./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/theatreSquare.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/theatreSquare.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL --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 90f363148c6ea94b18bb0ae0702d2476b109719554576ef0704192e7e62145c3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 04:46:16,134 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 04:46:16,136 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 04:46:16,170 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 04:46:16,171 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 04:46:16,172 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 04:46:16,174 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 04:46:16,176 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 04:46:16,179 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 04:46:16,180 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 04:46:16,182 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 04:46:16,183 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 04:46:16,184 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 04:46:16,185 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 04:46:16,187 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 04:46:16,189 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 04:46:16,190 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 04:46:16,192 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 04:46:16,194 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 04:46:16,197 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 04:46:16,200 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 04:46:16,202 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 04:46:16,203 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 04:46:16,205 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 04:46:16,209 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 04:46:16,209 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 04:46:16,210 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 04:46:16,211 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 04:46:16,212 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 04:46:16,213 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 04:46:16,214 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 04:46:16,215 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 04:46:16,216 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 04:46:16,217 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 04:46:16,218 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 04:46:16,219 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 04:46:16,220 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 04:46:16,220 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 04:46:16,221 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 04:46:16,222 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 04:46:16,223 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 04:46:16,225 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-19 04:46:16,253 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 04:46:16,254 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 04:46:16,255 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 04:46:16,255 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 04:46:16,256 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 04:46:16,256 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 04:46:16,257 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 04:46:16,258 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 04:46:16,258 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 04:46:16,259 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 04:46:16,259 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 04:46:16,260 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 04:46:16,260 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 04:46:16,260 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 04:46:16,261 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 04:46:16,261 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 04:46:16,261 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 04:46:16,262 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 04:46:16,262 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 04:46:16,263 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 04:46:16,263 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 04:46:16,264 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 04:46:16,264 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 04:46:16,264 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 04:46:16,265 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:46:16,265 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 04:46:16,266 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 04:46:16,266 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 04:46:16,267 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 04:46:16,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 04:46:16,267 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-19 04:46:16,268 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-19 04:46:16,268 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 04:46:16,269 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 04:46:16,269 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_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 90f363148c6ea94b18bb0ae0702d2476b109719554576ef0704192e7e62145c3 [2021-11-19 04:46:16,508 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 04:46:16,530 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 04:46:16,533 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 04:46:16,534 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 04:46:16,535 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 04:46:16,537 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/loops-crafted-1/theatreSquare.c [2021-11-19 04:46:16,625 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/data/21afc1cbf/fe39e3c5d1bc4316a9045b0b9135c640/FLAGaf764fcd5 [2021-11-19 04:46:17,111 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 04:46:17,112 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/sv-benchmarks/c/loops-crafted-1/theatreSquare.c [2021-11-19 04:46:17,119 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/data/21afc1cbf/fe39e3c5d1bc4316a9045b0b9135c640/FLAGaf764fcd5 [2021-11-19 04:46:17,472 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/data/21afc1cbf/fe39e3c5d1bc4316a9045b0b9135c640 [2021-11-19 04:46:17,475 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 04:46:17,476 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 04:46:17,478 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 04:46:17,481 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 04:46:17,484 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 04:46:17,485 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:46:17" (1/1) ... [2021-11-19 04:46:17,488 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@474e4eb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:17, skipping insertion in model container [2021-11-19 04:46:17,490 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:46:17" (1/1) ... [2021-11-19 04:46:17,497 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 04:46:17,515 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 04:46:17,654 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_ec59a602-875e-46fc-94de-720ce7a9b81c/sv-benchmarks/c/loops-crafted-1/theatreSquare.c[370,383] [2021-11-19 04:46:17,679 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:46:17,716 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 04:46:17,729 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_ec59a602-875e-46fc-94de-720ce7a9b81c/sv-benchmarks/c/loops-crafted-1/theatreSquare.c[370,383] [2021-11-19 04:46:17,739 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:46:17,756 INFO L208 MainTranslator]: Completed translation [2021-11-19 04:46:17,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:17 WrapperNode [2021-11-19 04:46:17,756 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 04:46:17,758 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 04:46:17,758 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 04:46:17,758 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 04:46:17,767 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:17" (1/1) ... [2021-11-19 04:46:17,775 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:17" (1/1) ... [2021-11-19 04:46:17,802 INFO L137 Inliner]: procedures = 15, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 100 [2021-11-19 04:46:17,802 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 04:46:17,803 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 04:46:17,803 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 04:46:17,804 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 04:46:17,813 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:17" (1/1) ... [2021-11-19 04:46:17,813 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:17" (1/1) ... [2021-11-19 04:46:17,815 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:17" (1/1) ... [2021-11-19 04:46:17,816 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:17" (1/1) ... [2021-11-19 04:46:17,820 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:17" (1/1) ... [2021-11-19 04:46:17,826 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:17" (1/1) ... [2021-11-19 04:46:17,827 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:17" (1/1) ... [2021-11-19 04:46:17,830 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 04:46:17,831 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 04:46:17,831 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 04:46:17,831 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 04:46:17,832 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:17" (1/1) ... [2021-11-19 04:46:17,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:46:17,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:46:17,876 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 04:46:17,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 04:46:17,918 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 04:46:17,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 04:46:17,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 04:46:17,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 04:46:17,983 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 04:46:17,984 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 04:46:18,136 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 04:46:18,144 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 04:46:18,144 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-19 04:46:18,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:46:18 BoogieIcfgContainer [2021-11-19 04:46:18,147 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 04:46:18,149 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 04:46:18,149 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 04:46:18,154 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 04:46:18,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:46:17" (1/3) ... [2021-11-19 04:46:18,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@495ecc5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:46:18, skipping insertion in model container [2021-11-19 04:46:18,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:17" (2/3) ... [2021-11-19 04:46:18,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@495ecc5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:46:18, skipping insertion in model container [2021-11-19 04:46:18,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:46:18" (3/3) ... [2021-11-19 04:46:18,157 INFO L111 eAbstractionObserver]: Analyzing ICFG theatreSquare.c [2021-11-19 04:46:18,163 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 04:46:18,164 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 04:46:18,218 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 04:46:18,227 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 [2021-11-19 04:46:18,228 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 04:46:18,261 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 22 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) [2021-11-19 04:46:18,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-19 04:46:18,267 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:46:18,268 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-19 04:46:18,269 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:46:18,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:46:18,276 INFO L85 PathProgramCache]: Analyzing trace with hash 891969447, now seen corresponding path program 1 times [2021-11-19 04:46:18,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:46:18,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513795063] [2021-11-19 04:46:18,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:46:18,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:46:18,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:46:18,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:46:18,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:46:18,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513795063] [2021-11-19 04:46:18,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513795063] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:46:18,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:46:18,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:46:18,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470362193] [2021-11-19 04:46:18,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:46:18,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:46:18,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:46:18,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:46:18,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:46:18,584 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 22 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) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:18,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:46:18,633 INFO L93 Difference]: Finished difference Result 48 states and 71 transitions. [2021-11-19 04:46:18,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:46:18,652 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-11-19 04:46:18,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:46:18,661 INFO L225 Difference]: With dead ends: 48 [2021-11-19 04:46:18,663 INFO L226 Difference]: Without dead ends: 19 [2021-11-19 04:46:18,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:46:18,676 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 21 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:46:18,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 65 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:46:18,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-19 04:46:18,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-19 04:46:18,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:18,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2021-11-19 04:46:18,725 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 6 [2021-11-19 04:46:18,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:46:18,725 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2021-11-19 04:46:18,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:18,726 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2021-11-19 04:46:18,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-19 04:46:18,727 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:46:18,727 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:46:18,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 04:46:18,729 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:46:18,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:46:18,735 INFO L85 PathProgramCache]: Analyzing trace with hash 535820783, now seen corresponding path program 1 times [2021-11-19 04:46:18,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:46:18,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073825966] [2021-11-19 04:46:18,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:46:18,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:46:18,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:46:18,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:46:18,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:46:18,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073825966] [2021-11-19 04:46:18,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073825966] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:46:18,962 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:46:18,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-19 04:46:18,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039505480] [2021-11-19 04:46:18,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:46:18,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 04:46:18,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:46:18,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 04:46:18,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:46:18,969 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 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) [2021-11-19 04:46:19,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:46:19,223 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2021-11-19 04:46:19,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 04:46:19,224 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 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 [2021-11-19 04:46:19,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:46:19,228 INFO L225 Difference]: With dead ends: 39 [2021-11-19 04:46:19,228 INFO L226 Difference]: Without dead ends: 33 [2021-11-19 04:46:19,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-11-19 04:46:19,239 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 64 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:46:19,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 133 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:46:19,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-19 04:46:19,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2021-11-19 04:46:19,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.36) internal successors, (34), 25 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) [2021-11-19 04:46:19,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2021-11-19 04:46:19,258 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 18 [2021-11-19 04:46:19,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:46:19,259 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2021-11-19 04:46:19,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 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) [2021-11-19 04:46:19,260 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2021-11-19 04:46:19,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-19 04:46:19,262 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:46:19,263 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:46:19,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 04:46:19,267 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:46:19,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:46:19,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1031838486, now seen corresponding path program 1 times [2021-11-19 04:46:19,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:46:19,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123972190] [2021-11-19 04:46:19,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:46:19,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:46:19,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:46:19,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:46:19,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:46:19,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123972190] [2021-11-19 04:46:19,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123972190] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:46:19,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:46:19,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:46:19,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137936683] [2021-11-19 04:46:19,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:46:19,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:46:19,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:46:19,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:46:19,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:46:19,405 INFO L87 Difference]: Start difference. First operand 26 states and 34 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) [2021-11-19 04:46:19,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:46:19,438 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2021-11-19 04:46:19,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:46:19,439 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 [2021-11-19 04:46:19,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:46:19,442 INFO L225 Difference]: With dead ends: 47 [2021-11-19 04:46:19,443 INFO L226 Difference]: Without dead ends: 37 [2021-11-19 04:46:19,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:46:19,445 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 14 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 45 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 [2021-11-19 04:46:19,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 45 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:46:19,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-19 04:46:19,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2021-11-19 04:46:19,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 30 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) [2021-11-19 04:46:19,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2021-11-19 04:46:19,469 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 19 [2021-11-19 04:46:19,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:46:19,470 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2021-11-19 04:46:19,470 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) [2021-11-19 04:46:19,470 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2021-11-19 04:46:19,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-19 04:46:19,472 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:46:19,472 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:46:19,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-19 04:46:19,473 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:46:19,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:46:19,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1782670069, now seen corresponding path program 1 times [2021-11-19 04:46:19,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:46:19,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292374520] [2021-11-19 04:46:19,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:46:19,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:46:19,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:46:19,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:46:19,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:46:19,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292374520] [2021-11-19 04:46:19,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292374520] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:46:19,582 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:46:19,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:46:19,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220417028] [2021-11-19 04:46:19,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:46:19,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:46:19,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:46:19,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:46:19,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:46:19,588 INFO L87 Difference]: Start difference. First operand 31 states and 41 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) [2021-11-19 04:46:19,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:46:19,618 INFO L93 Difference]: Finished difference Result 66 states and 86 transitions. [2021-11-19 04:46:19,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:46:19,619 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 [2021-11-19 04:46:19,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:46:19,621 INFO L225 Difference]: With dead ends: 66 [2021-11-19 04:46:19,621 INFO L226 Difference]: Without dead ends: 49 [2021-11-19 04:46:19,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:46:19,626 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 32 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 45 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 [2021-11-19 04:46:19,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 45 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:46:19,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-19 04:46:19,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 35. [2021-11-19 04:46:19,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:19,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 47 transitions. [2021-11-19 04:46:19,641 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 47 transitions. Word has length 19 [2021-11-19 04:46:19,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:46:19,641 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 47 transitions. [2021-11-19 04:46:19,642 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) [2021-11-19 04:46:19,642 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 47 transitions. [2021-11-19 04:46:19,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-19 04:46:19,643 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:46:19,643 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] [2021-11-19 04:46:19,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 04:46:19,644 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:46:19,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:46:19,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1545632287, now seen corresponding path program 1 times [2021-11-19 04:46:19,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:46:19,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623103137] [2021-11-19 04:46:19,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:46:19,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:46:19,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:46:19,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:46:19,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:46:19,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623103137] [2021-11-19 04:46:19,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623103137] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:46:19,708 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:46:19,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:46:19,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969582733] [2021-11-19 04:46:19,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:46:19,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:46:19,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:46:19,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:46:19,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:46:19,714 INFO L87 Difference]: Start difference. First operand 35 states and 47 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) [2021-11-19 04:46:19,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:46:19,733 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2021-11-19 04:46:19,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:46:19,734 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 [2021-11-19 04:46:19,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:46:19,736 INFO L225 Difference]: With dead ends: 49 [2021-11-19 04:46:19,736 INFO L226 Difference]: Without dead ends: 32 [2021-11-19 04:46:19,737 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 [2021-11-19 04:46:19,742 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:46:19,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:46:19,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-19 04:46:19,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-11-19 04:46:19,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:19,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-11-19 04:46:19,754 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 20 [2021-11-19 04:46:19,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:46:19,755 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-11-19 04:46:19,755 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) [2021-11-19 04:46:19,755 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-11-19 04:46:19,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-19 04:46:19,756 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:46:19,756 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] [2021-11-19 04:46:19,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-19 04:46:19,756 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:46:19,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:46:19,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1312537087, now seen corresponding path program 1 times [2021-11-19 04:46:19,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:46:19,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261244298] [2021-11-19 04:46:19,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:46:19,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:46:19,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:46:19,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:46:19,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:46:19,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261244298] [2021-11-19 04:46:19,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261244298] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:46:19,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:46:19,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:46:19,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820903102] [2021-11-19 04:46:19,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:46:19,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:46:19,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:46:19,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:46:19,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:46:19,812 INFO L87 Difference]: Start difference. First operand 32 states and 42 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) [2021-11-19 04:46:19,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:46:19,823 INFO L93 Difference]: Finished difference Result 59 states and 78 transitions. [2021-11-19 04:46:19,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:46:19,824 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 [2021-11-19 04:46:19,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:46:19,824 INFO L225 Difference]: With dead ends: 59 [2021-11-19 04:46:19,824 INFO L226 Difference]: Without dead ends: 33 [2021-11-19 04:46:19,825 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 [2021-11-19 04:46:19,826 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:46:19,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:46:19,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-19 04:46:19,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-11-19 04:46:19,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.34375) internal successors, (43), 32 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) [2021-11-19 04:46:19,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-11-19 04:46:19,832 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 20 [2021-11-19 04:46:19,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:46:19,832 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-11-19 04:46:19,832 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) [2021-11-19 04:46:19,832 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-11-19 04:46:19,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-19 04:46:19,833 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:46:19,833 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] [2021-11-19 04:46:19,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-19 04:46:19,833 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:46:19,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:46:19,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1130312570, now seen corresponding path program 1 times [2021-11-19 04:46:19,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:46:19,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13484621] [2021-11-19 04:46:19,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:46:19,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:46:19,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:46:19,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 04:46:19,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:46:19,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13484621] [2021-11-19 04:46:19,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13484621] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:46:19,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:46:19,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 04:46:19,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019749763] [2021-11-19 04:46:19,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:46:19,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:46:19,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:46:19,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:46:19,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:46:19,914 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:19,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:46:19,964 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2021-11-19 04:46:19,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:46:19,969 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2021-11-19 04:46:19,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:46:19,970 INFO L225 Difference]: With dead ends: 39 [2021-11-19 04:46:19,970 INFO L226 Difference]: Without dead ends: 30 [2021-11-19 04:46:19,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:46:19,972 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 21 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:46:19,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 41 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:46:19,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-19 04:46:19,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-11-19 04:46:19,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:19,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2021-11-19 04:46:19,979 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 21 [2021-11-19 04:46:19,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:46:19,979 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2021-11-19 04:46:19,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:19,980 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2021-11-19 04:46:19,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-19 04:46:19,980 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:46:19,981 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] [2021-11-19 04:46:19,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-19 04:46:19,981 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:46:19,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:46:19,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1437483694, now seen corresponding path program 1 times [2021-11-19 04:46:19,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:46:19,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855667197] [2021-11-19 04:46:19,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:46:19,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:46:20,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:46:20,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 04:46:20,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:46:20,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855667197] [2021-11-19 04:46:20,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855667197] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:46:20,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681748747] [2021-11-19 04:46:20,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:46:20,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:46:20,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:46:20,057 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:46:20,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 04:46:20,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:46:20,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 04:46:20,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:46:20,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 04:46:20,279 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:46:20,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681748747] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:46:20,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:46:20,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2021-11-19 04:46:20,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311631737] [2021-11-19 04:46:20,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:46:20,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:46:20,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:46:20,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:46:20,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:46:20,284 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:20,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:46:20,323 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2021-11-19 04:46:20,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:46:20,324 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2021-11-19 04:46:20,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:46:20,325 INFO L225 Difference]: With dead ends: 37 [2021-11-19 04:46:20,326 INFO L226 Difference]: Without dead ends: 23 [2021-11-19 04:46:20,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:46:20,328 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 37 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:46:20,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 40 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:46:20,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-19 04:46:20,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-19 04:46:20,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:20,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2021-11-19 04:46:20,356 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 22 [2021-11-19 04:46:20,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:46:20,356 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2021-11-19 04:46:20,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:20,357 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2021-11-19 04:46:20,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-19 04:46:20,359 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:46:20,359 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] [2021-11-19 04:46:20,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 04:46:20,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-19 04:46:20,575 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:46:20,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:46:20,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1965889039, now seen corresponding path program 1 times [2021-11-19 04:46:20,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:46:20,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431840617] [2021-11-19 04:46:20,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:46:20,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:46:20,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:46:20,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 04:46:20,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:46:20,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431840617] [2021-11-19 04:46:20,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431840617] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:46:20,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713271197] [2021-11-19 04:46:20,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:46:20,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:46:20,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:46:20,652 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:46:20,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 04:46:20,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:46:20,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 04:46:20,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:46:20,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:46:20,800 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:46:20,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713271197] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:46:20,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:46:20,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-11-19 04:46:20,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412575717] [2021-11-19 04:46:20,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:46:20,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:46:20,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:46:20,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:46:20,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:46:20,803 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:20,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:46:20,835 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2021-11-19 04:46:20,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:46:20,836 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2021-11-19 04:46:20,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:46:20,837 INFO L225 Difference]: With dead ends: 32 [2021-11-19 04:46:20,837 INFO L226 Difference]: Without dead ends: 24 [2021-11-19 04:46:20,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:46:20,838 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 13 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:46:20,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 42 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:46:20,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-19 04:46:20,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-19 04:46:20,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:20,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-11-19 04:46:20,844 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 22 [2021-11-19 04:46:20,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:46:20,845 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-11-19 04:46:20,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:20,845 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-11-19 04:46:20,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-19 04:46:20,846 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:46:20,847 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] [2021-11-19 04:46:20,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 04:46:21,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:46:21,074 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:46:21,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:46:21,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1829813877, now seen corresponding path program 1 times [2021-11-19 04:46:21,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:46:21,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047046096] [2021-11-19 04:46:21,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:46:21,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:46:21,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:46:21,125 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:46:21,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:46:21,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047046096] [2021-11-19 04:46:21,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047046096] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:46:21,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175366082] [2021-11-19 04:46:21,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:46:21,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:46:21,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:46:21,127 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:46:21,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 04:46:21,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:46:21,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 04:46:21,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:46:21,284 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:46:21,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:46:21,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175366082] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:46:21,285 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:46:21,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2021-11-19 04:46:21,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309432823] [2021-11-19 04:46:21,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:46:21,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:46:21,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:46:21,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:46:21,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:46:21,287 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:21,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:46:21,309 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2021-11-19 04:46:21,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:46:21,309 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2021-11-19 04:46:21,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:46:21,313 INFO L225 Difference]: With dead ends: 31 [2021-11-19 04:46:21,314 INFO L226 Difference]: Without dead ends: 25 [2021-11-19 04:46:21,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:46:21,315 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 19 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:46:21,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 51 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:46:21,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-19 04:46:21,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-19 04:46:21,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 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) [2021-11-19 04:46:21,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2021-11-19 04:46:21,330 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 23 [2021-11-19 04:46:21,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:46:21,334 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2021-11-19 04:46:21,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:21,335 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2021-11-19 04:46:21,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 04:46:21,337 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:46:21,337 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] [2021-11-19 04:46:21,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 04:46:21,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-19 04:46:21,538 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:46:21,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:46:21,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1804048560, now seen corresponding path program 1 times [2021-11-19 04:46:21,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:46:21,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470478741] [2021-11-19 04:46:21,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:46:21,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:46:21,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:46:21,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:46:21,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:46:21,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470478741] [2021-11-19 04:46:21,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470478741] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:46:21,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959223531] [2021-11-19 04:46:21,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:46:21,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:46:21,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:46:21,799 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:46:21,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 04:46:21,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:46:21,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-19 04:46:21,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:46:22,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:46:22,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:46:22,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:46:22,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959223531] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:46:22,502 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:46:22,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 23 [2021-11-19 04:46:22,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884056876] [2021-11-19 04:46:22,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:46:22,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-19 04:46:22,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:46:22,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-19 04:46:22,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-11-19 04:46:22,506 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:22,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:46:22,998 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2021-11-19 04:46:22,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 04:46:22,998 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 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 24 [2021-11-19 04:46:22,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:46:22,999 INFO L225 Difference]: With dead ends: 77 [2021-11-19 04:46:22,999 INFO L226 Difference]: Without dead ends: 71 [2021-11-19 04:46:23,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=188, Invalid=1072, Unknown=0, NotChecked=0, Total=1260 [2021-11-19 04:46:23,001 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 120 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:46:23,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 264 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:46:23,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-19 04:46:23,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 37. [2021-11-19 04:46:23,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 36 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:23,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-11-19 04:46:23,009 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 24 [2021-11-19 04:46:23,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:46:23,009 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-11-19 04:46:23,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:23,010 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-11-19 04:46:23,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-19 04:46:23,011 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:46:23,011 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:46:23,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 04:46:23,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:46:23,226 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:46:23,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:46:23,227 INFO L85 PathProgramCache]: Analyzing trace with hash 571706934, now seen corresponding path program 2 times [2021-11-19 04:46:23,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:46:23,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59926306] [2021-11-19 04:46:23,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:46:23,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:46:23,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:46:23,325 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:46:23,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:46:23,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59926306] [2021-11-19 04:46:23,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59926306] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:46:23,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761944035] [2021-11-19 04:46:23,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:46:23,326 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:46:23,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:46:23,328 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:46:23,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 04:46:23,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:46:23,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:46:23,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 04:46:23,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:46:23,523 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:46:23,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:46:23,658 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:46:23,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761944035] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:46:23,658 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:46:23,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-11-19 04:46:23,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256801961] [2021-11-19 04:46:23,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:46:23,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 04:46:23,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:46:23,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 04:46:23,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-19 04:46:23,666 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 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) [2021-11-19 04:46:23,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:46:23,770 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2021-11-19 04:46:23,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 04:46:23,771 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 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 25 [2021-11-19 04:46:23,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:46:23,775 INFO L225 Difference]: With dead ends: 63 [2021-11-19 04:46:23,775 INFO L226 Difference]: Without dead ends: 53 [2021-11-19 04:46:23,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-11-19 04:46:23,777 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 101 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:46:23,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 130 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:46:23,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-19 04:46:23,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2021-11-19 04:46:23,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.255813953488372) internal successors, (54), 43 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:23,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2021-11-19 04:46:23,803 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 25 [2021-11-19 04:46:23,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:46:23,805 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2021-11-19 04:46:23,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 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) [2021-11-19 04:46:23,806 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2021-11-19 04:46:23,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-19 04:46:23,810 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:46:23,811 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:46:23,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-19 04:46:24,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:46:24,028 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:46:24,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:46:24,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1510332885, now seen corresponding path program 3 times [2021-11-19 04:46:24,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:46:24,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238559760] [2021-11-19 04:46:24,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:46:24,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:46:24,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:46:24,077 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:46:24,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:46:24,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238559760] [2021-11-19 04:46:24,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238559760] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:46:24,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531435234] [2021-11-19 04:46:24,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:46:24,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:46:24,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:46:24,082 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:46:24,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-19 04:46:24,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 04:46:24,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:46:24,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 04:46:24,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:46:24,224 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:46:24,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:46:24,273 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:46:24,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531435234] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:46:24,273 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:46:24,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-11-19 04:46:24,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904471423] [2021-11-19 04:46:24,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:46:24,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 04:46:24,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:46:24,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 04:46:24,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-19 04:46:24,276 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 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) [2021-11-19 04:46:24,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:46:24,304 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2021-11-19 04:46:24,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 04:46:24,304 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 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 25 [2021-11-19 04:46:24,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:46:24,305 INFO L225 Difference]: With dead ends: 72 [2021-11-19 04:46:24,305 INFO L226 Difference]: Without dead ends: 60 [2021-11-19 04:46:24,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-19 04:46:24,307 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 24 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:46:24,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 127 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:46:24,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-19 04:46:24,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2021-11-19 04:46:24,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.2641509433962264) internal successors, (67), 53 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:24,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2021-11-19 04:46:24,320 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 25 [2021-11-19 04:46:24,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:46:24,321 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2021-11-19 04:46:24,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 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) [2021-11-19 04:46:24,321 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2021-11-19 04:46:24,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-19 04:46:24,325 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:46:24,326 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:46:24,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-19 04:46:24,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:46:24,554 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:46:24,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:46:24,555 INFO L85 PathProgramCache]: Analyzing trace with hash 595735960, now seen corresponding path program 4 times [2021-11-19 04:46:24,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:46:24,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650711950] [2021-11-19 04:46:24,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:46:24,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:46:24,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:46:24,600 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:46:24,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:46:24,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650711950] [2021-11-19 04:46:24,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650711950] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:46:24,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081960969] [2021-11-19 04:46:24,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 04:46:24,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:46:24,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:46:24,603 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:46:24,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-19 04:46:24,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 04:46:24,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:46:24,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 04:46:24,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:46:24,755 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:46:24,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:46:24,812 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:46:24,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081960969] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:46:24,812 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:46:24,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-11-19 04:46:24,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859856375] [2021-11-19 04:46:24,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:46:24,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 04:46:24,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:46:24,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 04:46:24,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-19 04:46:24,814 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 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) [2021-11-19 04:46:24,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:46:24,848 INFO L93 Difference]: Finished difference Result 126 states and 157 transitions. [2021-11-19 04:46:24,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 04:46:24,849 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 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 25 [2021-11-19 04:46:24,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:46:24,850 INFO L225 Difference]: With dead ends: 126 [2021-11-19 04:46:24,850 INFO L226 Difference]: Without dead ends: 94 [2021-11-19 04:46:24,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-19 04:46:24,851 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 45 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:46:24,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 92 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:46:24,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-19 04:46:24,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 64. [2021-11-19 04:46:24,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.2698412698412698) internal successors, (80), 63 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:24,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2021-11-19 04:46:24,871 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 25 [2021-11-19 04:46:24,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:46:24,871 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2021-11-19 04:46:24,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 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) [2021-11-19 04:46:24,872 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2021-11-19 04:46:24,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-19 04:46:24,872 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:46:24,872 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:46:24,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-19 04:46:25,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-19 04:46:25,098 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:46:25,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:46:25,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1299373655, now seen corresponding path program 5 times [2021-11-19 04:46:25,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:46:25,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67633075] [2021-11-19 04:46:25,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:46:25,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:46:25,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:46:25,195 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:46:25,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:46:25,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67633075] [2021-11-19 04:46:25,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67633075] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:46:25,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166711510] [2021-11-19 04:46:25,197 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 04:46:25,197 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:46:25,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:46:25,198 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:46:25,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-19 04:46:25,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:46:25,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:46:25,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 04:46:25,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:46:25,422 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:46:25,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:46:25,553 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:46:25,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166711510] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:46:25,554 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:46:25,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2021-11-19 04:46:25,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501722460] [2021-11-19 04:46:25,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:46:25,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 04:46:25,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:46:25,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 04:46:25,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:46:25,556 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:25,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:46:25,677 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2021-11-19 04:46:25,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 04:46:25,678 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 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 25 [2021-11-19 04:46:25,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:46:25,679 INFO L225 Difference]: With dead ends: 90 [2021-11-19 04:46:25,679 INFO L226 Difference]: Without dead ends: 78 [2021-11-19 04:46:25,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-11-19 04:46:25,684 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 107 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:46:25,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 173 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:46:25,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-19 04:46:25,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 66. [2021-11-19 04:46:25,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 65 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) [2021-11-19 04:46:25,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2021-11-19 04:46:25,707 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 25 [2021-11-19 04:46:25,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:46:25,707 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2021-11-19 04:46:25,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:25,708 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2021-11-19 04:46:25,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-19 04:46:25,710 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:46:25,710 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:46:25,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-19 04:46:25,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-19 04:46:25,926 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:46:25,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:46:25,926 INFO L85 PathProgramCache]: Analyzing trace with hash -120572194, now seen corresponding path program 6 times [2021-11-19 04:46:25,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:46:25,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167944743] [2021-11-19 04:46:25,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:46:25,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:46:25,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:46:25,991 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:46:25,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:46:25,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167944743] [2021-11-19 04:46:25,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167944743] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:46:25,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706496936] [2021-11-19 04:46:25,993 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 04:46:25,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:46:25,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:46:25,994 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:46:26,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-19 04:46:26,058 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-19 04:46:26,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:46:26,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 04:46:26,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:46:26,189 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:46:26,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:46:26,305 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:46:26,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706496936] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:46:26,305 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:46:26,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-11-19 04:46:26,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709897732] [2021-11-19 04:46:26,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:46:26,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 04:46:26,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:46:26,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 04:46:26,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-19 04:46:26,307 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:26,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:46:26,408 INFO L93 Difference]: Finished difference Result 104 states and 124 transitions. [2021-11-19 04:46:26,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 04:46:26,409 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 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 [2021-11-19 04:46:26,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:46:26,409 INFO L225 Difference]: With dead ends: 104 [2021-11-19 04:46:26,410 INFO L226 Difference]: Without dead ends: 79 [2021-11-19 04:46:26,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-11-19 04:46:26,411 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 81 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:46:26,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 151 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:46:26,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-19 04:46:26,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 67. [2021-11-19 04:46:26,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.2424242424242424) internal successors, (82), 66 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) [2021-11-19 04:46:26,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 82 transitions. [2021-11-19 04:46:26,423 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 82 transitions. Word has length 26 [2021-11-19 04:46:26,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:46:26,423 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 82 transitions. [2021-11-19 04:46:26,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:26,424 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 82 transitions. [2021-11-19 04:46:26,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-19 04:46:26,424 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:46:26,425 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:46:26,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-19 04:46:26,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-19 04:46:26,640 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:46:26,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:46:26,641 INFO L85 PathProgramCache]: Analyzing trace with hash -2006452209, now seen corresponding path program 7 times [2021-11-19 04:46:26,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:46:26,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441645172] [2021-11-19 04:46:26,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:46:26,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:46:26,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:46:26,872 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:46:26,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:46:26,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441645172] [2021-11-19 04:46:26,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441645172] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:46:26,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013167602] [2021-11-19 04:46:26,873 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 04:46:26,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:46:26,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:46:26,874 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:46:26,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-19 04:46:26,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:46:26,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-19 04:46:26,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:46:27,278 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:46:27,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:46:27,525 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:46:27,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013167602] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:46:27,526 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:46:27,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 26 [2021-11-19 04:46:27,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663192910] [2021-11-19 04:46:27,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:46:27,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-19 04:46:27,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:46:27,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-19 04:46:27,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-11-19 04:46:27,527 INFO L87 Difference]: Start difference. First operand 67 states and 82 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:28,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:46:28,119 INFO L93 Difference]: Finished difference Result 159 states and 188 transitions. [2021-11-19 04:46:28,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-19 04:46:28,120 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 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 [2021-11-19 04:46:28,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:46:28,121 INFO L225 Difference]: With dead ends: 159 [2021-11-19 04:46:28,121 INFO L226 Difference]: Without dead ends: 150 [2021-11-19 04:46:28,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=207, Invalid=1433, Unknown=0, NotChecked=0, Total=1640 [2021-11-19 04:46:28,123 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 143 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:46:28,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 523 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:46:28,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-19 04:46:28,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 88. [2021-11-19 04:46:28,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.2528735632183907) internal successors, (109), 87 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:28,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2021-11-19 04:46:28,142 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 26 [2021-11-19 04:46:28,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:46:28,142 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2021-11-19 04:46:28,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:28,142 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2021-11-19 04:46:28,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-19 04:46:28,144 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:46:28,144 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:46:28,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-19 04:46:28,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-19 04:46:28,360 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:46:28,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:46:28,361 INFO L85 PathProgramCache]: Analyzing trace with hash -216163038, now seen corresponding path program 8 times [2021-11-19 04:46:28,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:46:28,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090675050] [2021-11-19 04:46:28,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:46:28,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:46:28,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:46:28,432 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:46:28,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:46:28,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090675050] [2021-11-19 04:46:28,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090675050] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:46:28,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586216464] [2021-11-19 04:46:28,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:46:28,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:46:28,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:46:28,435 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:46:28,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-19 04:46:28,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:46:28,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:46:28,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 04:46:28,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:46:28,655 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:46:28,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:46:28,766 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:46:28,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586216464] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:46:28,767 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:46:28,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2021-11-19 04:46:28,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986234175] [2021-11-19 04:46:28,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:46:28,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 04:46:28,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:46:28,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 04:46:28,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:46:28,770 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 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) [2021-11-19 04:46:28,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:46:28,881 INFO L93 Difference]: Finished difference Result 107 states and 127 transitions. [2021-11-19 04:46:28,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 04:46:28,881 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 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 26 [2021-11-19 04:46:28,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:46:28,883 INFO L225 Difference]: With dead ends: 107 [2021-11-19 04:46:28,883 INFO L226 Difference]: Without dead ends: 92 [2021-11-19 04:46:28,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-11-19 04:46:28,887 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 89 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:46:28,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 190 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:46:28,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-19 04:46:28,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 86. [2021-11-19 04:46:28,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.223529411764706) internal successors, (104), 85 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:28,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 104 transitions. [2021-11-19 04:46:28,902 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 104 transitions. Word has length 26 [2021-11-19 04:46:28,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:46:28,902 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 104 transitions. [2021-11-19 04:46:28,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 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) [2021-11-19 04:46:28,902 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 104 transitions. [2021-11-19 04:46:28,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-19 04:46:28,903 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:46:28,903 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:46:28,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-19 04:46:29,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-19 04:46:29,123 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:46:29,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:46:29,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1407838889, now seen corresponding path program 9 times [2021-11-19 04:46:29,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:46:29,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346816476] [2021-11-19 04:46:29,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:46:29,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:46:29,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:46:29,220 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:46:29,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:46:29,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346816476] [2021-11-19 04:46:29,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346816476] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:46:29,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656069732] [2021-11-19 04:46:29,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:46:29,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:46:29,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:46:29,222 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:46:29,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-19 04:46:29,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-19 04:46:29,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:46:29,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 04:46:29,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:46:29,562 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:46:29,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:46:29,728 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:46:29,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656069732] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:46:29,729 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:46:29,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2021-11-19 04:46:29,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001979278] [2021-11-19 04:46:29,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:46:29,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 04:46:29,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:46:29,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 04:46:29,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-11-19 04:46:29,731 INFO L87 Difference]: Start difference. First operand 86 states and 104 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:30,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:46:30,110 INFO L93 Difference]: Finished difference Result 131 states and 154 transitions. [2021-11-19 04:46:30,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 04:46:30,110 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 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 27 [2021-11-19 04:46:30,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:46:30,111 INFO L225 Difference]: With dead ends: 131 [2021-11-19 04:46:30,112 INFO L226 Difference]: Without dead ends: 107 [2021-11-19 04:46:30,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=187, Invalid=625, Unknown=0, NotChecked=0, Total=812 [2021-11-19 04:46:30,113 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 157 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:46:30,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 341 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:46:30,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-19 04:46:30,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 83. [2021-11-19 04:46:30,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.2317073170731707) internal successors, (101), 82 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:30,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2021-11-19 04:46:30,130 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 27 [2021-11-19 04:46:30,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:46:30,130 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2021-11-19 04:46:30,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:30,131 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2021-11-19 04:46:30,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-19 04:46:30,131 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:46:30,131 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:46:30,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-19 04:46:30,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:46:30,358 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:46:30,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:46:30,359 INFO L85 PathProgramCache]: Analyzing trace with hash -325007018, now seen corresponding path program 10 times [2021-11-19 04:46:30,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:46:30,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921296885] [2021-11-19 04:46:30,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:46:30,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:46:30,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:46:30,468 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:46:30,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:46:30,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921296885] [2021-11-19 04:46:30,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921296885] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:46:30,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226519949] [2021-11-19 04:46:30,469 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 04:46:30,470 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:46:30,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:46:30,471 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:46:30,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-19 04:46:30,527 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 04:46:30,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:46:30,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 04:46:30,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:46:30,797 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:46:30,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:46:30,994 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:46:30,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226519949] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:46:30,995 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:46:30,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2021-11-19 04:46:30,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308697949] [2021-11-19 04:46:30,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:46:30,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 04:46:30,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:46:30,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 04:46:30,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-11-19 04:46:30,997 INFO L87 Difference]: Start difference. First operand 83 states and 101 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:31,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:46:31,320 INFO L93 Difference]: Finished difference Result 121 states and 141 transitions. [2021-11-19 04:46:31,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 04:46:31,322 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 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 27 [2021-11-19 04:46:31,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:46:31,323 INFO L225 Difference]: With dead ends: 121 [2021-11-19 04:46:31,323 INFO L226 Difference]: Without dead ends: 109 [2021-11-19 04:46:31,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-11-19 04:46:31,325 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 208 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:46:31,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 314 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:46:31,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-19 04:46:31,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2021-11-19 04:46:31,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.2261904761904763) internal successors, (103), 84 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:31,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 103 transitions. [2021-11-19 04:46:31,342 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 103 transitions. Word has length 27 [2021-11-19 04:46:31,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:46:31,343 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 103 transitions. [2021-11-19 04:46:31,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:31,343 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 103 transitions. [2021-11-19 04:46:31,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-19 04:46:31,344 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:46:31,344 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:46:31,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-19 04:46:31,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:46:31,558 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:46:31,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:46:31,559 INFO L85 PathProgramCache]: Analyzing trace with hash 480362644, now seen corresponding path program 11 times [2021-11-19 04:46:31,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:46:31,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977512301] [2021-11-19 04:46:31,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:46:31,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:46:31,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:46:31,619 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 04:46:31,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:46:31,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977512301] [2021-11-19 04:46:31,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977512301] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:46:31,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354165773] [2021-11-19 04:46:31,619 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 04:46:31,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:46:31,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:46:31,620 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:46:31,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-19 04:46:31,673 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:46:31,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:46:31,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 04:46:31,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:46:31,763 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 04:46:31,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:46:31,844 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 04:46:31,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354165773] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:46:31,845 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:46:31,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-11-19 04:46:31,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067242046] [2021-11-19 04:46:31,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:46:31,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 04:46:31,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:46:31,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 04:46:31,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-19 04:46:31,847 INFO L87 Difference]: Start difference. First operand 85 states and 103 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-11-19 04:46:31,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:46:31,906 INFO L93 Difference]: Finished difference Result 110 states and 130 transitions. [2021-11-19 04:46:31,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 04:46:31,909 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 27 [2021-11-19 04:46:31,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:46:31,910 INFO L225 Difference]: With dead ends: 110 [2021-11-19 04:46:31,910 INFO L226 Difference]: Without dead ends: 77 [2021-11-19 04:46:31,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:46:31,912 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 47 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:46:31,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 153 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:46:31,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-19 04:46:31,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2021-11-19 04:46:31,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 70 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) [2021-11-19 04:46:31,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2021-11-19 04:46:31,928 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 27 [2021-11-19 04:46:31,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:46:31,929 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2021-11-19 04:46:31,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-11-19 04:46:31,929 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2021-11-19 04:46:31,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-19 04:46:31,930 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:46:31,930 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:46:31,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-19 04:46:32,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-19 04:46:32,143 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:46:32,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:46:32,143 INFO L85 PathProgramCache]: Analyzing trace with hash 400247189, now seen corresponding path program 12 times [2021-11-19 04:46:32,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:46:32,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833760049] [2021-11-19 04:46:32,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:46:32,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:46:32,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:46:32,208 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 04:46:32,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:46:32,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833760049] [2021-11-19 04:46:32,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833760049] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:46:32,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554798927] [2021-11-19 04:46:32,209 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 04:46:32,209 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:46:32,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:46:32,210 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:46:32,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-19 04:46:32,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-19 04:46:32,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:46:32,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 04:46:32,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:46:32,363 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 04:46:32,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:46:32,453 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 04:46:32,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554798927] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:46:32,454 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:46:32,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-11-19 04:46:32,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453676292] [2021-11-19 04:46:32,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:46:32,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 04:46:32,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:46:32,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 04:46:32,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-19 04:46:32,456 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-11-19 04:46:32,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:46:32,513 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2021-11-19 04:46:32,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 04:46:32,514 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 27 [2021-11-19 04:46:32,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:46:32,515 INFO L225 Difference]: With dead ends: 84 [2021-11-19 04:46:32,515 INFO L226 Difference]: Without dead ends: 78 [2021-11-19 04:46:32,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:46:32,518 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 32 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:46:32,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 150 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:46:32,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-19 04:46:32,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2021-11-19 04:46:32,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 71 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:32,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2021-11-19 04:46:32,534 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 27 [2021-11-19 04:46:32,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:46:32,536 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2021-11-19 04:46:32,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-11-19 04:46:32,536 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2021-11-19 04:46:32,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-19 04:46:32,537 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:46:32,537 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:46:32,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-19 04:46:32,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-19 04:46:32,742 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:46:32,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:46:32,743 INFO L85 PathProgramCache]: Analyzing trace with hash -822645520, now seen corresponding path program 13 times [2021-11-19 04:46:32,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:46:32,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130454463] [2021-11-19 04:46:32,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:46:32,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:46:32,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:46:33,011 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:46:33,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:46:33,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130454463] [2021-11-19 04:46:33,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130454463] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:46:33,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017871455] [2021-11-19 04:46:33,011 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 04:46:33,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:46:33,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:46:33,012 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:46:33,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-19 04:46:33,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:46:33,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-19 04:46:33,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:46:33,393 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:46:33,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:46:33,660 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:46:33,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017871455] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:46:33,660 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:46:33,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 29 [2021-11-19 04:46:33,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438090995] [2021-11-19 04:46:33,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:46:33,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-19 04:46:33,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:46:33,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-19 04:46:33,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=741, Unknown=0, NotChecked=0, Total=812 [2021-11-19 04:46:33,662 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 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) [2021-11-19 04:46:34,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:46:34,384 INFO L93 Difference]: Finished difference Result 149 states and 168 transitions. [2021-11-19 04:46:34,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-19 04:46:34,384 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 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 28 [2021-11-19 04:46:34,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:46:34,386 INFO L225 Difference]: With dead ends: 149 [2021-11-19 04:46:34,386 INFO L226 Difference]: Without dead ends: 140 [2021-11-19 04:46:34,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=226, Invalid=1844, Unknown=0, NotChecked=0, Total=2070 [2021-11-19 04:46:34,389 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 147 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 906 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:46:34,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 906 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:46:34,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-19 04:46:34,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 81. [2021-11-19 04:46:34,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.2) internal successors, (96), 80 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:34,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 96 transitions. [2021-11-19 04:46:34,407 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 96 transitions. Word has length 28 [2021-11-19 04:46:34,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:46:34,407 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 96 transitions. [2021-11-19 04:46:34,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 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) [2021-11-19 04:46:34,408 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 96 transitions. [2021-11-19 04:46:34,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-19 04:46:34,408 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:46:34,408 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] [2021-11-19 04:46:34,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-19 04:46:34,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-19 04:46:34,630 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:46:34,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:46:34,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1124024368, now seen corresponding path program 14 times [2021-11-19 04:46:34,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:46:34,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137046221] [2021-11-19 04:46:34,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:46:34,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:46:34,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:46:34,852 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:46:34,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:46:34,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137046221] [2021-11-19 04:46:34,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137046221] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:46:34,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806072480] [2021-11-19 04:46:34,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:46:34,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:46:34,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:46:34,855 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:46:34,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-19 04:46:34,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:46:34,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:46:34,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-19 04:46:34,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:46:35,341 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:46:35,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:46:35,591 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:46:35,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806072480] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:46:35,591 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:46:35,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 27 [2021-11-19 04:46:35,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319781230] [2021-11-19 04:46:35,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:46:35,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-19 04:46:35,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:46:35,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-19 04:46:35,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2021-11-19 04:46:35,593 INFO L87 Difference]: Start difference. First operand 81 states and 96 transitions. Second operand has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 27 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:36,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:46:36,041 INFO L93 Difference]: Finished difference Result 118 states and 135 transitions. [2021-11-19 04:46:36,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-19 04:46:36,041 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 27 states have internal predecessors, (47), 0 states have call successors, (0), 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 [2021-11-19 04:46:36,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:46:36,042 INFO L225 Difference]: With dead ends: 118 [2021-11-19 04:46:36,042 INFO L226 Difference]: Without dead ends: 112 [2021-11-19 04:46:36,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=205, Invalid=1435, Unknown=0, NotChecked=0, Total=1640 [2021-11-19 04:46:36,044 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 107 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:46:36,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 393 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:46:36,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-19 04:46:36,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 91. [2021-11-19 04:46:36,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.2) internal successors, (108), 90 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:36,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 108 transitions. [2021-11-19 04:46:36,061 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 108 transitions. Word has length 28 [2021-11-19 04:46:36,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:46:36,062 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 108 transitions. [2021-11-19 04:46:36,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 27 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:36,062 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 108 transitions. [2021-11-19 04:46:36,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-19 04:46:36,063 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:46:36,063 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:46:36,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-19 04:46:36,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-19 04:46:36,277 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:46:36,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:46:36,277 INFO L85 PathProgramCache]: Analyzing trace with hash 930430102, now seen corresponding path program 15 times [2021-11-19 04:46:36,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:46:36,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667803833] [2021-11-19 04:46:36,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:46:36,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:46:36,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:46:36,402 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:46:36,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:46:36,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667803833] [2021-11-19 04:46:36,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667803833] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:46:36,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474714456] [2021-11-19 04:46:36,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:46:36,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:46:36,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:46:36,404 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:46:36,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-19 04:46:36,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-19 04:46:36,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:46:36,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 04:46:36,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:46:36,794 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:46:36,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:46:37,022 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:46:37,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474714456] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:46:37,022 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:46:37,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2021-11-19 04:46:37,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704766461] [2021-11-19 04:46:37,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:46:37,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-19 04:46:37,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:46:37,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-19 04:46:37,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-11-19 04:46:37,027 INFO L87 Difference]: Start difference. First operand 91 states and 108 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:37,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:46:37,696 INFO L93 Difference]: Finished difference Result 155 states and 178 transitions. [2021-11-19 04:46:37,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 04:46:37,696 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-19 04:46:37,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:46:37,697 INFO L225 Difference]: With dead ends: 155 [2021-11-19 04:46:37,697 INFO L226 Difference]: Without dead ends: 129 [2021-11-19 04:46:37,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=363, Invalid=1277, Unknown=0, NotChecked=0, Total=1640 [2021-11-19 04:46:37,699 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 390 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:46:37,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 432 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:46:37,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-19 04:46:37,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 94. [2021-11-19 04:46:37,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.2150537634408602) internal successors, (113), 93 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:37,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 113 transitions. [2021-11-19 04:46:37,719 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 113 transitions. Word has length 29 [2021-11-19 04:46:37,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:46:37,719 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 113 transitions. [2021-11-19 04:46:37,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:37,719 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 113 transitions. [2021-11-19 04:46:37,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-19 04:46:37,720 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:46:37,720 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:46:37,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-19 04:46:37,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:46:37,938 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:46:37,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:46:37,939 INFO L85 PathProgramCache]: Analyzing trace with hash 138479735, now seen corresponding path program 16 times [2021-11-19 04:46:37,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:46:37,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778177579] [2021-11-19 04:46:37,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:46:37,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:46:37,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:46:38,089 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:46:38,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:46:38,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778177579] [2021-11-19 04:46:38,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778177579] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:46:38,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111226789] [2021-11-19 04:46:38,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 04:46:38,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:46:38,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:46:38,094 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:46:38,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-19 04:46:38,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 04:46:38,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:46:38,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 04:46:38,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:46:38,472 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:46:38,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:46:38,724 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:46:38,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111226789] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:46:38,724 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:46:38,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 25 [2021-11-19 04:46:38,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949502412] [2021-11-19 04:46:38,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:46:38,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-19 04:46:38,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:46:38,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-19 04:46:38,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-11-19 04:46:38,727 INFO L87 Difference]: Start difference. First operand 94 states and 113 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:39,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:46:39,200 INFO L93 Difference]: Finished difference Result 144 states and 165 transitions. [2021-11-19 04:46:39,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 04:46:39,209 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-19 04:46:39,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:46:39,211 INFO L225 Difference]: With dead ends: 144 [2021-11-19 04:46:39,211 INFO L226 Difference]: Without dead ends: 131 [2021-11-19 04:46:39,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=186, Invalid=1004, Unknown=0, NotChecked=0, Total=1190 [2021-11-19 04:46:39,215 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 378 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:46:39,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [378 Valid, 701 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:46:39,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-19 04:46:39,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 96. [2021-11-19 04:46:39,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.2105263157894737) internal successors, (115), 95 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:39,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 115 transitions. [2021-11-19 04:46:39,239 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 115 transitions. Word has length 29 [2021-11-19 04:46:39,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:46:39,240 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 115 transitions. [2021-11-19 04:46:39,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:39,240 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 115 transitions. [2021-11-19 04:46:39,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-19 04:46:39,241 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:46:39,241 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:46:39,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-19 04:46:39,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-19 04:46:39,458 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:46:39,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:46:39,459 INFO L85 PathProgramCache]: Analyzing trace with hash 2086280437, now seen corresponding path program 17 times [2021-11-19 04:46:39,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:46:39,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370326636] [2021-11-19 04:46:39,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:46:39,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:46:39,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:46:39,526 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 04:46:39,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:46:39,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370326636] [2021-11-19 04:46:39,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370326636] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:46:39,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59809798] [2021-11-19 04:46:39,527 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 04:46:39,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:46:39,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:46:39,535 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:46:39,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-19 04:46:39,595 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-19 04:46:39,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:46:39,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 04:46:39,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:46:39,695 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 04:46:39,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:46:39,765 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 04:46:39,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59809798] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:46:39,766 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:46:39,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2021-11-19 04:46:39,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644984281] [2021-11-19 04:46:39,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:46:39,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 04:46:39,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:46:39,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 04:46:39,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-11-19 04:46:39,769 INFO L87 Difference]: Start difference. First operand 96 states and 115 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:39,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:46:39,847 INFO L93 Difference]: Finished difference Result 139 states and 163 transitions. [2021-11-19 04:46:39,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 04:46:39,848 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 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 29 [2021-11-19 04:46:39,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:46:39,849 INFO L225 Difference]: With dead ends: 139 [2021-11-19 04:46:39,849 INFO L226 Difference]: Without dead ends: 126 [2021-11-19 04:46:39,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-11-19 04:46:39,850 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 46 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:46:39,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 134 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:46:39,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-19 04:46:39,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 112. [2021-11-19 04:46:39,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.2252252252252251) internal successors, (136), 111 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:39,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 136 transitions. [2021-11-19 04:46:39,887 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 136 transitions. Word has length 29 [2021-11-19 04:46:39,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:46:39,887 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 136 transitions. [2021-11-19 04:46:39,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:39,887 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 136 transitions. [2021-11-19 04:46:39,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-19 04:46:39,888 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:46:39,888 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:46:39,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-19 04:46:40,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-19 04:46:40,098 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:46:40,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:46:40,099 INFO L85 PathProgramCache]: Analyzing trace with hash -397298668, now seen corresponding path program 18 times [2021-11-19 04:46:40,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:46:40,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406231086] [2021-11-19 04:46:40,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:46:40,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:46:40,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:46:40,168 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 04:46:40,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:46:40,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406231086] [2021-11-19 04:46:40,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406231086] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:46:40,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481642917] [2021-11-19 04:46:40,169 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 04:46:40,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:46:40,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:46:40,170 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:46:40,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-19 04:46:40,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-19 04:46:40,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:46:40,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 04:46:40,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:46:40,347 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 04:46:40,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:46:40,413 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 04:46:40,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481642917] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:46:40,414 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:46:40,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2021-11-19 04:46:40,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941967154] [2021-11-19 04:46:40,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:46:40,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 04:46:40,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:46:40,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 04:46:40,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-11-19 04:46:40,416 INFO L87 Difference]: Start difference. First operand 112 states and 136 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:40,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:46:40,521 INFO L93 Difference]: Finished difference Result 262 states and 317 transitions. [2021-11-19 04:46:40,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 04:46:40,522 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 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 29 [2021-11-19 04:46:40,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:46:40,524 INFO L225 Difference]: With dead ends: 262 [2021-11-19 04:46:40,524 INFO L226 Difference]: Without dead ends: 202 [2021-11-19 04:46:40,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-11-19 04:46:40,525 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 117 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:46:40,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 180 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:46:40,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-11-19 04:46:40,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 134. [2021-11-19 04:46:40,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.2255639097744362) internal successors, (163), 133 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:40,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 163 transitions. [2021-11-19 04:46:40,561 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 163 transitions. Word has length 29 [2021-11-19 04:46:40,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:46:40,561 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 163 transitions. [2021-11-19 04:46:40,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:40,561 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 163 transitions. [2021-11-19 04:46:40,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-19 04:46:40,562 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:46:40,562 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:46:40,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-19 04:46:40,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:46:40,778 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:46:40,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:46:40,779 INFO L85 PathProgramCache]: Analyzing trace with hash 660541935, now seen corresponding path program 19 times [2021-11-19 04:46:40,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:46:40,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257783798] [2021-11-19 04:46:40,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:46:40,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:46:40,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:46:41,059 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:46:41,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:46:41,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257783798] [2021-11-19 04:46:41,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257783798] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:46:41,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824059318] [2021-11-19 04:46:41,060 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 04:46:41,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:46:41,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:46:41,068 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:46:41,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-19 04:46:41,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:46:41,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-19 04:46:41,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:46:41,487 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:46:41,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:46:41,744 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:46:41,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824059318] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:46:41,744 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:46:41,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 32 [2021-11-19 04:46:41,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474121876] [2021-11-19 04:46:41,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:46:41,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-19 04:46:41,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:46:41,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-19 04:46:41,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=914, Unknown=0, NotChecked=0, Total=992 [2021-11-19 04:46:41,746 INFO L87 Difference]: Start difference. First operand 134 states and 163 transitions. Second operand has 32 states, 32 states have (on average 1.59375) internal successors, (51), 32 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:42,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:46:42,534 INFO L93 Difference]: Finished difference Result 258 states and 295 transitions. [2021-11-19 04:46:42,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-19 04:46:42,534 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.59375) internal successors, (51), 32 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-19 04:46:42,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:46:42,536 INFO L225 Difference]: With dead ends: 258 [2021-11-19 04:46:42,536 INFO L226 Difference]: Without dead ends: 249 [2021-11-19 04:46:42,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=245, Invalid=2305, Unknown=0, NotChecked=0, Total=2550 [2021-11-19 04:46:42,538 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 164 mSDsluCounter, 1182 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 1248 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:46:42,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 1248 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:46:42,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-11-19 04:46:42,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 143. [2021-11-19 04:46:42,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.2183098591549295) internal successors, (173), 142 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:42,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 173 transitions. [2021-11-19 04:46:42,570 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 173 transitions. Word has length 30 [2021-11-19 04:46:42,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:46:42,571 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 173 transitions. [2021-11-19 04:46:42,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.59375) internal successors, (51), 32 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:42,571 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 173 transitions. [2021-11-19 04:46:42,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-19 04:46:42,571 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:46:42,572 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:46:42,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-19 04:46:42,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-19 04:46:42,772 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:46:42,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:46:42,772 INFO L85 PathProgramCache]: Analyzing trace with hash 283195298, now seen corresponding path program 20 times [2021-11-19 04:46:42,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:46:42,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903477581] [2021-11-19 04:46:42,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:46:42,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:46:42,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:46:42,857 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 04:46:42,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:46:42,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903477581] [2021-11-19 04:46:42,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903477581] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:46:42,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147548965] [2021-11-19 04:46:42,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:46:42,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:46:42,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:46:42,859 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:46:42,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-19 04:46:42,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:46:42,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:46:42,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 04:46:42,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:46:43,092 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 04:46:43,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:46:43,242 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 04:46:43,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147548965] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:46:43,243 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:46:43,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2021-11-19 04:46:43,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648057320] [2021-11-19 04:46:43,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:46:43,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 04:46:43,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:46:43,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 04:46:43,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-11-19 04:46:43,244 INFO L87 Difference]: Start difference. First operand 143 states and 173 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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) [2021-11-19 04:46:43,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:46:43,542 INFO L93 Difference]: Finished difference Result 217 states and 254 transitions. [2021-11-19 04:46:43,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 04:46:43,543 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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 30 [2021-11-19 04:46:43,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:46:43,544 INFO L225 Difference]: With dead ends: 217 [2021-11-19 04:46:43,545 INFO L226 Difference]: Without dead ends: 181 [2021-11-19 04:46:43,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=187, Invalid=625, Unknown=0, NotChecked=0, Total=812 [2021-11-19 04:46:43,546 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 208 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:46:43,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 347 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:46:43,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-19 04:46:43,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 154. [2021-11-19 04:46:43,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.196078431372549) internal successors, (183), 153 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) [2021-11-19 04:46:43,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 183 transitions. [2021-11-19 04:46:43,584 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 183 transitions. Word has length 30 [2021-11-19 04:46:43,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:46:43,584 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 183 transitions. [2021-11-19 04:46:43,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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) [2021-11-19 04:46:43,585 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 183 transitions. [2021-11-19 04:46:43,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-19 04:46:43,586 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:46:43,586 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:46:43,614 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-19 04:46:43,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:46:43,802 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:46:43,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:46:43,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1226887537, now seen corresponding path program 21 times [2021-11-19 04:46:43,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:46:43,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796922741] [2021-11-19 04:46:43,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:46:43,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:46:43,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:46:44,036 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:46:44,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:46:44,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796922741] [2021-11-19 04:46:44,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796922741] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:46:44,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790810561] [2021-11-19 04:46:44,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:46:44,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:46:44,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:46:44,038 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:46:44,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-19 04:46:44,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 04:46:44,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:46:44,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-19 04:46:44,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:46:44,446 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:46:44,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:46:44,706 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:46:44,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790810561] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:46:44,707 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:46:44,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 30 [2021-11-19 04:46:44,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800039060] [2021-11-19 04:46:44,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:46:44,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-19 04:46:44,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:46:44,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-19 04:46:44,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=793, Unknown=0, NotChecked=0, Total=870 [2021-11-19 04:46:44,708 INFO L87 Difference]: Start difference. First operand 154 states and 183 transitions. Second operand has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:45,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:46:45,235 INFO L93 Difference]: Finished difference Result 226 states and 258 transitions. [2021-11-19 04:46:45,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 04:46:45,235 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-19 04:46:45,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:46:45,237 INFO L225 Difference]: With dead ends: 226 [2021-11-19 04:46:45,237 INFO L226 Difference]: Without dead ends: 204 [2021-11-19 04:46:45,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=223, Invalid=1847, Unknown=0, NotChecked=0, Total=2070 [2021-11-19 04:46:45,238 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 123 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:46:45,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 666 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:46:45,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-11-19 04:46:45,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 153. [2021-11-19 04:46:45,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.2039473684210527) internal successors, (183), 152 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) [2021-11-19 04:46:45,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 183 transitions. [2021-11-19 04:46:45,274 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 183 transitions. Word has length 30 [2021-11-19 04:46:45,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:46:45,274 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 183 transitions. [2021-11-19 04:46:45,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:45,274 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 183 transitions. [2021-11-19 04:46:45,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-19 04:46:45,275 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:46:45,275 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:46:45,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-19 04:46:45,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-19 04:46:45,478 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:46:45,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:46:45,479 INFO L85 PathProgramCache]: Analyzing trace with hash 628770462, now seen corresponding path program 22 times [2021-11-19 04:46:45,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:46:45,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276774762] [2021-11-19 04:46:45,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:46:45,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:46:45,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:46:45,594 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 04:46:45,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:46:45,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276774762] [2021-11-19 04:46:45,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276774762] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:46:45,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214128472] [2021-11-19 04:46:45,595 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 04:46:45,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:46:45,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:46:45,598 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:46:45,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-19 04:46:45,657 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 04:46:45,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:46:45,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 04:46:45,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:46:45,889 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 04:46:45,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:46:46,054 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 04:46:46,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214128472] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:46:46,054 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:46:46,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2021-11-19 04:46:46,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875974978] [2021-11-19 04:46:46,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:46:46,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 04:46:46,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:46:46,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 04:46:46,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-11-19 04:46:46,055 INFO L87 Difference]: Start difference. First operand 153 states and 183 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:46,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:46:46,318 INFO L93 Difference]: Finished difference Result 186 states and 214 transitions. [2021-11-19 04:46:46,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 04:46:46,319 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-19 04:46:46,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:46:46,320 INFO L225 Difference]: With dead ends: 186 [2021-11-19 04:46:46,320 INFO L226 Difference]: Without dead ends: 167 [2021-11-19 04:46:46,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-11-19 04:46:46,322 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 226 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:46:46,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 465 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:46:46,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-19 04:46:46,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 153. [2021-11-19 04:46:46,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.1776315789473684) internal successors, (179), 152 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:46,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 179 transitions. [2021-11-19 04:46:46,365 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 179 transitions. Word has length 30 [2021-11-19 04:46:46,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:46:46,366 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 179 transitions. [2021-11-19 04:46:46,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:46,366 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 179 transitions. [2021-11-19 04:46:46,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-19 04:46:46,367 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:46:46,367 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:46:46,392 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-11-19 04:46:46,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:46:46,578 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:46:46,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:46:46,579 INFO L85 PathProgramCache]: Analyzing trace with hash -335399049, now seen corresponding path program 23 times [2021-11-19 04:46:46,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:46:46,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895495468] [2021-11-19 04:46:46,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:46:46,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:46:46,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:46:46,719 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:46:46,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:46:46,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895495468] [2021-11-19 04:46:46,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895495468] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:46:46,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540507455] [2021-11-19 04:46:46,720 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 04:46:46,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:46:46,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:46:46,730 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:46:46,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-19 04:46:46,786 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-19 04:46:46,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:46:46,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-19 04:46:46,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:46:47,217 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:46:47,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:46:47,473 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:46:47,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540507455] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:46:47,473 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:46:47,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2021-11-19 04:46:47,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488009020] [2021-11-19 04:46:47,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:46:47,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-19 04:46:47,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:46:47,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-19 04:46:47,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2021-11-19 04:46:47,475 INFO L87 Difference]: Start difference. First operand 153 states and 179 transitions. Second operand has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:48,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:46:48,494 INFO L93 Difference]: Finished difference Result 263 states and 298 transitions. [2021-11-19 04:46:48,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-19 04:46:48,495 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 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 31 [2021-11-19 04:46:48,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:46:48,496 INFO L225 Difference]: With dead ends: 263 [2021-11-19 04:46:48,496 INFO L226 Difference]: Without dead ends: 233 [2021-11-19 04:46:48,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=617, Invalid=2245, Unknown=0, NotChecked=0, Total=2862 [2021-11-19 04:46:48,498 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 600 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:46:48,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 618 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:46:48,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-11-19 04:46:48,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 168. [2021-11-19 04:46:48,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.1796407185628743) internal successors, (197), 167 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:48,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 197 transitions. [2021-11-19 04:46:48,545 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 197 transitions. Word has length 31 [2021-11-19 04:46:48,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:46:48,546 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 197 transitions. [2021-11-19 04:46:48,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:48,546 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 197 transitions. [2021-11-19 04:46:48,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-19 04:46:48,547 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:46:48,547 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:46:48,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-11-19 04:46:48,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:46:48,770 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:46:48,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:46:48,771 INFO L85 PathProgramCache]: Analyzing trace with hash 883943350, now seen corresponding path program 24 times [2021-11-19 04:46:48,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:46:48,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916372166] [2021-11-19 04:46:48,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:46:48,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:46:48,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:46:48,946 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:46:48,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:46:48,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916372166] [2021-11-19 04:46:48,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916372166] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:46:48,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000037038] [2021-11-19 04:46:48,947 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 04:46:48,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:46:48,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:46:48,948 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:46:48,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-19 04:46:48,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-19 04:46:48,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:46:48,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-19 04:46:48,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:46:49,338 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:46:49,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:46:49,595 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:46:49,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000037038] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:46:49,596 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:46:49,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2021-11-19 04:46:49,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832336505] [2021-11-19 04:46:49,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:46:49,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-19 04:46:49,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:46:49,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-19 04:46:49,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-11-19 04:46:49,598 INFO L87 Difference]: Start difference. First operand 168 states and 197 transitions. Second operand has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:50,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:46:50,308 INFO L93 Difference]: Finished difference Result 251 states and 283 transitions. [2021-11-19 04:46:50,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 04:46:50,309 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 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 31 [2021-11-19 04:46:50,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:46:50,310 INFO L225 Difference]: With dead ends: 251 [2021-11-19 04:46:50,310 INFO L226 Difference]: Without dead ends: 236 [2021-11-19 04:46:50,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=247, Invalid=1559, Unknown=0, NotChecked=0, Total=1806 [2021-11-19 04:46:50,311 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 531 mSDsluCounter, 1032 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 1098 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:46:50,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [531 Valid, 1098 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:46:50,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-11-19 04:46:50,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 171. [2021-11-19 04:46:50,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.1764705882352942) internal successors, (200), 170 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:50,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 200 transitions. [2021-11-19 04:46:50,348 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 200 transitions. Word has length 31 [2021-11-19 04:46:50,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:46:50,349 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 200 transitions. [2021-11-19 04:46:50,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:50,349 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 200 transitions. [2021-11-19 04:46:50,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-19 04:46:50,350 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:46:50,350 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:46:50,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-19 04:46:50,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:46:50,566 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:46:50,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:46:50,567 INFO L85 PathProgramCache]: Analyzing trace with hash 2026567256, now seen corresponding path program 25 times [2021-11-19 04:46:50,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:46:50,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878667472] [2021-11-19 04:46:50,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:46:50,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:46:50,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:46:50,629 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 04:46:50,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:46:50,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878667472] [2021-11-19 04:46:50,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878667472] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:46:50,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685332815] [2021-11-19 04:46:50,630 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 04:46:50,630 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:46:50,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:46:50,639 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:46:50,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-19 04:46:50,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:46:50,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 04:46:50,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:46:50,800 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 04:46:50,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:46:50,885 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 04:46:50,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685332815] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:46:50,886 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:46:50,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-11-19 04:46:50,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674639132] [2021-11-19 04:46:50,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:46:50,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 04:46:50,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:46:50,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 04:46:50,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:46:50,888 INFO L87 Difference]: Start difference. First operand 171 states and 200 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:51,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:46:51,005 INFO L93 Difference]: Finished difference Result 227 states and 261 transitions. [2021-11-19 04:46:51,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 04:46:51,005 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 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 31 [2021-11-19 04:46:51,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:46:51,007 INFO L225 Difference]: With dead ends: 227 [2021-11-19 04:46:51,007 INFO L226 Difference]: Without dead ends: 171 [2021-11-19 04:46:51,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-11-19 04:46:51,008 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 83 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:46:51,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 206 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:46:51,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-19 04:46:51,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 157. [2021-11-19 04:46:51,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.1666666666666667) internal successors, (182), 156 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:51,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 182 transitions. [2021-11-19 04:46:51,056 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 182 transitions. Word has length 31 [2021-11-19 04:46:51,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:46:51,057 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 182 transitions. [2021-11-19 04:46:51,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:51,057 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 182 transitions. [2021-11-19 04:46:51,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-19 04:46:51,058 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:46:51,058 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:46:51,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-19 04:46:51,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:46:51,274 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:46:51,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:46:51,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1679203531, now seen corresponding path program 26 times [2021-11-19 04:46:51,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:46:51,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435642755] [2021-11-19 04:46:51,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:46:51,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:46:51,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:46:51,366 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 04:46:51,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:46:51,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435642755] [2021-11-19 04:46:51,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435642755] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:46:51,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282415736] [2021-11-19 04:46:51,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:46:51,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:46:51,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:46:51,368 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:46:51,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-19 04:46:51,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:46:51,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:46:51,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 04:46:51,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:46:51,534 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 04:46:51,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:46:51,589 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 04:46:51,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282415736] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:46:51,589 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:46:51,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-11-19 04:46:51,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427089202] [2021-11-19 04:46:51,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:46:51,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 04:46:51,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:46:51,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 04:46:51,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:46:51,590 INFO L87 Difference]: Start difference. First operand 157 states and 182 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:51,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:46:51,674 INFO L93 Difference]: Finished difference Result 178 states and 201 transitions. [2021-11-19 04:46:51,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 04:46:51,674 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 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 31 [2021-11-19 04:46:51,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:46:51,675 INFO L225 Difference]: With dead ends: 178 [2021-11-19 04:46:51,675 INFO L226 Difference]: Without dead ends: 172 [2021-11-19 04:46:51,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-11-19 04:46:51,677 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 30 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:46:51,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 216 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:46:51,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-19 04:46:51,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 158. [2021-11-19 04:46:51,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.1656050955414012) internal successors, (183), 157 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) [2021-11-19 04:46:51,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 183 transitions. [2021-11-19 04:46:51,714 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 183 transitions. Word has length 31 [2021-11-19 04:46:51,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:46:51,715 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 183 transitions. [2021-11-19 04:46:51,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:51,715 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 183 transitions. [2021-11-19 04:46:51,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-19 04:46:51,715 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:46:51,715 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:46:51,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-11-19 04:46:51,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:46:51,916 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:46:51,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:46:51,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1999889776, now seen corresponding path program 27 times [2021-11-19 04:46:51,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:46:51,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317179557] [2021-11-19 04:46:51,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:46:51,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:46:51,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:46:52,290 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:46:52,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:46:52,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317179557] [2021-11-19 04:46:52,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317179557] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:46:52,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990407207] [2021-11-19 04:46:52,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:46:52,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:46:52,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:46:52,294 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:46:52,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-19 04:46:52,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-19 04:46:52,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:46:52,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-19 04:46:52,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:46:52,799 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:46:52,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:46:53,052 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:46:53,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990407207] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:46:53,053 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:46:53,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 35 [2021-11-19 04:46:53,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281870614] [2021-11-19 04:46:53,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:46:53,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-19 04:46:53,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:46:53,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-19 04:46:53,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1105, Unknown=0, NotChecked=0, Total=1190 [2021-11-19 04:46:53,055 INFO L87 Difference]: Start difference. First operand 158 states and 183 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 35 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:54,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:46:54,215 INFO L93 Difference]: Finished difference Result 305 states and 337 transitions. [2021-11-19 04:46:54,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-19 04:46:54,215 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 35 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-19 04:46:54,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:46:54,217 INFO L225 Difference]: With dead ends: 305 [2021-11-19 04:46:54,218 INFO L226 Difference]: Without dead ends: 296 [2021-11-19 04:46:54,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=264, Invalid=2816, Unknown=0, NotChecked=0, Total=3080 [2021-11-19 04:46:54,220 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 196 mSDsluCounter, 1791 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 1874 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:46:54,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 1874 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 04:46:54,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-11-19 04:46:54,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 167. [2021-11-19 04:46:54,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.1626506024096386) internal successors, (193), 166 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:54,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 193 transitions. [2021-11-19 04:46:54,267 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 193 transitions. Word has length 32 [2021-11-19 04:46:54,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:46:54,267 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 193 transitions. [2021-11-19 04:46:54,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 35 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:54,268 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 193 transitions. [2021-11-19 04:46:54,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-19 04:46:54,268 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:46:54,269 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:46:54,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-19 04:46:54,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:46:54,479 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:46:54,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:46:54,480 INFO L85 PathProgramCache]: Analyzing trace with hash -120192688, now seen corresponding path program 28 times [2021-11-19 04:46:54,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:46:54,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276881580] [2021-11-19 04:46:54,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:46:54,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:46:54,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:46:54,780 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:46:54,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:46:54,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276881580] [2021-11-19 04:46:54,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276881580] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:46:54,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599435594] [2021-11-19 04:46:54,781 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 04:46:54,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:46:54,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:46:54,784 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:46:54,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-19 04:46:54,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 04:46:54,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:46:54,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-19 04:46:54,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:46:55,231 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:46:55,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:46:55,460 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:46:55,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599435594] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:46:55,461 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:46:55,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 33 [2021-11-19 04:46:55,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919736568] [2021-11-19 04:46:55,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:46:55,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-19 04:46:55,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:46:55,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-19 04:46:55,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=972, Unknown=0, NotChecked=0, Total=1056 [2021-11-19 04:46:55,462 INFO L87 Difference]: Start difference. First operand 167 states and 193 transitions. Second operand has 33 states, 33 states have (on average 1.606060606060606) internal successors, (53), 33 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:56,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:46:56,169 INFO L93 Difference]: Finished difference Result 223 states and 248 transitions. [2021-11-19 04:46:56,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-19 04:46:56,170 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.606060606060606) internal successors, (53), 33 states have internal predecessors, (53), 0 states have call successors, (0), 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 [2021-11-19 04:46:56,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:46:56,171 INFO L225 Difference]: With dead ends: 223 [2021-11-19 04:46:56,171 INFO L226 Difference]: Without dead ends: 200 [2021-11-19 04:46:56,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 44 SyntacticMatches, 7 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=241, Invalid=2309, Unknown=0, NotChecked=0, Total=2550 [2021-11-19 04:46:56,172 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 111 mSDsluCounter, 1075 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 1130 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:46:56,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 1130 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:46:56,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-11-19 04:46:56,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 158. [2021-11-19 04:46:56,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.1656050955414012) internal successors, (183), 157 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) [2021-11-19 04:46:56,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 183 transitions. [2021-11-19 04:46:56,213 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 183 transitions. Word has length 32 [2021-11-19 04:46:56,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:46:56,214 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 183 transitions. [2021-11-19 04:46:56,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.606060606060606) internal successors, (53), 33 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:56,214 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 183 transitions. [2021-11-19 04:46:56,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-19 04:46:56,215 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:46:56,215 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:46:56,237 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-11-19 04:46:56,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-19 04:46:56,419 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:46:56,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:46:56,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1085561488, now seen corresponding path program 29 times [2021-11-19 04:46:56,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:46:56,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887594272] [2021-11-19 04:46:56,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:46:56,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:46:56,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:46:56,678 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 04:46:56,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:46:56,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887594272] [2021-11-19 04:46:56,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887594272] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:46:56,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455078516] [2021-11-19 04:46:56,679 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 04:46:56,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:46:56,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:46:56,686 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:46:56,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-19 04:46:56,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-19 04:46:56,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:46:56,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-19 04:46:56,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:46:57,125 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 04:46:57,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:46:57,349 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 04:46:57,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455078516] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:46:57,349 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:46:57,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 31 [2021-11-19 04:46:57,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94493961] [2021-11-19 04:46:57,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:46:57,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-19 04:46:57,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:46:57,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-19 04:46:57,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=847, Unknown=0, NotChecked=0, Total=930 [2021-11-19 04:46:57,352 INFO L87 Difference]: Start difference. First operand 158 states and 183 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 31 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:57,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:46:57,863 INFO L93 Difference]: Finished difference Result 198 states and 225 transitions. [2021-11-19 04:46:57,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-19 04:46:57,864 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 31 states have internal predecessors, (51), 0 states have call successors, (0), 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 [2021-11-19 04:46:57,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:46:57,865 INFO L225 Difference]: With dead ends: 198 [2021-11-19 04:46:57,865 INFO L226 Difference]: Without dead ends: 192 [2021-11-19 04:46:57,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 44 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=235, Invalid=1927, Unknown=0, NotChecked=0, Total=2162 [2021-11-19 04:46:57,866 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 108 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:46:57,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 448 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:46:57,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-19 04:46:57,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 169. [2021-11-19 04:46:57,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.1666666666666667) internal successors, (196), 168 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:57,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 196 transitions. [2021-11-19 04:46:57,908 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 196 transitions. Word has length 32 [2021-11-19 04:46:57,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:46:57,908 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 196 transitions. [2021-11-19 04:46:57,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 31 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:46:57,909 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 196 transitions. [2021-11-19 04:46:57,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-19 04:46:57,909 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:46:57,909 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:46:57,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-19 04:46:58,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-19 04:46:58,110 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:46:58,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:46:58,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1204403466, now seen corresponding path program 30 times [2021-11-19 04:46:58,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:46:58,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951350790] [2021-11-19 04:46:58,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:46:58,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:46:58,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:46:58,306 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:46:58,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:46:58,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951350790] [2021-11-19 04:46:58,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951350790] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:46:58,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238834061] [2021-11-19 04:46:58,306 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 04:46:58,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:46:58,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:46:58,308 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:46:58,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-19 04:46:58,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-19 04:46:58,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:46:58,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-19 04:46:58,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:46:58,860 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:46:58,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:46:59,189 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:46:59,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238834061] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:46:59,189 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:46:59,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 34 [2021-11-19 04:46:59,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393298561] [2021-11-19 04:46:59,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:46:59,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-19 04:46:59,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:46:59,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-19 04:46:59,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1029, Unknown=0, NotChecked=0, Total=1122 [2021-11-19 04:46:59,192 INFO L87 Difference]: Start difference. First operand 169 states and 196 transitions. Second operand has 34 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 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) [2021-11-19 04:47:00,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:47:00,789 INFO L93 Difference]: Finished difference Result 299 states and 335 transitions. [2021-11-19 04:47:00,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-19 04:47:00,790 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 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) Word has length 33 [2021-11-19 04:47:00,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:47:00,791 INFO L225 Difference]: With dead ends: 299 [2021-11-19 04:47:00,791 INFO L226 Difference]: Without dead ends: 267 [2021-11-19 04:47:00,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=964, Invalid=3592, Unknown=0, NotChecked=0, Total=4556 [2021-11-19 04:47:00,793 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 946 mSDsluCounter, 783 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 946 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:47:00,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [946 Valid, 842 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:47:00,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-11-19 04:47:00,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 185. [2021-11-19 04:47:00,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.1684782608695652) internal successors, (215), 184 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:00,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 215 transitions. [2021-11-19 04:47:00,834 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 215 transitions. Word has length 33 [2021-11-19 04:47:00,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:47:00,834 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 215 transitions. [2021-11-19 04:47:00,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 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) [2021-11-19 04:47:00,835 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 215 transitions. [2021-11-19 04:47:00,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-19 04:47:00,836 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:47:00,836 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:47:00,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-19 04:47:01,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-19 04:47:01,050 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:47:01,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:47:01,051 INFO L85 PathProgramCache]: Analyzing trace with hash -2059494761, now seen corresponding path program 31 times [2021-11-19 04:47:01,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:47:01,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763994551] [2021-11-19 04:47:01,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:47:01,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:47:01,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:47:01,302 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:47:01,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:47:01,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763994551] [2021-11-19 04:47:01,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763994551] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:47:01,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331436702] [2021-11-19 04:47:01,303 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 04:47:01,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:47:01,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:47:01,310 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:47:01,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-19 04:47:01,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:47:01,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-19 04:47:01,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:47:01,872 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:47:01,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:47:02,267 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:47:02,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331436702] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:47:02,268 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:47:02,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 35 [2021-11-19 04:47:02,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348640567] [2021-11-19 04:47:02,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:47:02,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-19 04:47:02,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:47:02,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-19 04:47:02,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1088, Unknown=0, NotChecked=0, Total=1190 [2021-11-19 04:47:02,270 INFO L87 Difference]: Start difference. First operand 185 states and 215 transitions. Second operand has 35 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 35 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:03,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:47:03,418 INFO L93 Difference]: Finished difference Result 286 states and 319 transitions. [2021-11-19 04:47:03,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-19 04:47:03,419 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 35 states have internal predecessors, (65), 0 states have call successors, (0), 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 33 [2021-11-19 04:47:03,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:47:03,420 INFO L225 Difference]: With dead ends: 286 [2021-11-19 04:47:03,421 INFO L226 Difference]: Without dead ends: 270 [2021-11-19 04:47:03,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=314, Invalid=2236, Unknown=0, NotChecked=0, Total=2550 [2021-11-19 04:47:03,423 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 671 mSDsluCounter, 1530 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 1612 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:47:03,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [671 Valid, 1612 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:47:03,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-11-19 04:47:03,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 188. [2021-11-19 04:47:03,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.1657754010695187) internal successors, (218), 187 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:03,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 218 transitions. [2021-11-19 04:47:03,484 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 218 transitions. Word has length 33 [2021-11-19 04:47:03,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:47:03,484 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 218 transitions. [2021-11-19 04:47:03,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 35 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:03,484 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 218 transitions. [2021-11-19 04:47:03,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-19 04:47:03,485 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:47:03,485 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:47:03,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-19 04:47:03,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:47:03,706 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:47:03,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:47:03,707 INFO L85 PathProgramCache]: Analyzing trace with hash 893931157, now seen corresponding path program 32 times [2021-11-19 04:47:03,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:47:03,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655647147] [2021-11-19 04:47:03,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:47:03,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:47:03,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:47:03,774 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 04:47:03,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:47:03,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655647147] [2021-11-19 04:47:03,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655647147] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:47:03,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269172791] [2021-11-19 04:47:03,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:47:03,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:47:03,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:47:03,782 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:47:03,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-19 04:47:03,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:47:03,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:47:03,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 04:47:03,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:47:03,958 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 04:47:03,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:47:04,033 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 04:47:04,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269172791] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:47:04,034 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:47:04,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2021-11-19 04:47:04,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148675223] [2021-11-19 04:47:04,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:47:04,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-19 04:47:04,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:47:04,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-19 04:47:04,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-11-19 04:47:04,036 INFO L87 Difference]: Start difference. First operand 188 states and 218 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:04,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:47:04,235 INFO L93 Difference]: Finished difference Result 247 states and 283 transitions. [2021-11-19 04:47:04,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 04:47:04,235 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 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 33 [2021-11-19 04:47:04,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:47:04,237 INFO L225 Difference]: With dead ends: 247 [2021-11-19 04:47:04,237 INFO L226 Difference]: Without dead ends: 233 [2021-11-19 04:47:04,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2021-11-19 04:47:04,241 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 86 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:47:04,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 217 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:47:04,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-11-19 04:47:04,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 210. [2021-11-19 04:47:04,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 1.1818181818181819) internal successors, (247), 209 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:04,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 247 transitions. [2021-11-19 04:47:04,310 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 247 transitions. Word has length 33 [2021-11-19 04:47:04,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:47:04,310 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 247 transitions. [2021-11-19 04:47:04,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:04,311 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 247 transitions. [2021-11-19 04:47:04,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-19 04:47:04,311 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:47:04,311 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:47:04,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-19 04:47:04,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:47:04,530 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:47:04,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:47:04,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1979153752, now seen corresponding path program 33 times [2021-11-19 04:47:04,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:47:04,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258750224] [2021-11-19 04:47:04,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:47:04,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:47:04,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:47:04,588 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 04:47:04,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:47:04,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258750224] [2021-11-19 04:47:04,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258750224] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:47:04,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363528880] [2021-11-19 04:47:04,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:47:04,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:47:04,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:47:04,591 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:47:04,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-19 04:47:04,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-19 04:47:04,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:47:04,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 04:47:04,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:47:04,768 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 04:47:04,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:47:04,840 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 04:47:04,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363528880] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:47:04,840 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:47:04,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2021-11-19 04:47:04,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300706941] [2021-11-19 04:47:04,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:47:04,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-19 04:47:04,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:47:04,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-19 04:47:04,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-11-19 04:47:04,843 INFO L87 Difference]: Start difference. First operand 210 states and 247 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:05,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:47:05,054 INFO L93 Difference]: Finished difference Result 443 states and 524 transitions. [2021-11-19 04:47:05,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 04:47:05,055 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 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 33 [2021-11-19 04:47:05,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:47:05,056 INFO L225 Difference]: With dead ends: 443 [2021-11-19 04:47:05,056 INFO L226 Difference]: Without dead ends: 353 [2021-11-19 04:47:05,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2021-11-19 04:47:05,057 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 198 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:47:05,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 312 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:47:05,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-11-19 04:47:05,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 248. [2021-11-19 04:47:05,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.1821862348178138) internal successors, (292), 247 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:05,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 292 transitions. [2021-11-19 04:47:05,143 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 292 transitions. Word has length 33 [2021-11-19 04:47:05,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:47:05,144 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 292 transitions. [2021-11-19 04:47:05,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:05,144 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 292 transitions. [2021-11-19 04:47:05,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-19 04:47:05,145 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:47:05,145 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:47:05,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-19 04:47:05,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-11-19 04:47:05,365 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:47:05,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:47:05,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1242809295, now seen corresponding path program 34 times [2021-11-19 04:47:05,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:47:05,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791402871] [2021-11-19 04:47:05,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:47:05,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:47:05,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:47:05,779 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:47:05,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:47:05,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791402871] [2021-11-19 04:47:05,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791402871] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:47:05,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90336194] [2021-11-19 04:47:05,779 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 04:47:05,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:47:05,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:47:05,786 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:47:05,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-19 04:47:05,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 04:47:05,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:47:05,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-19 04:47:05,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:47:06,426 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:47:06,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:47:06,696 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:47:06,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90336194] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:47:06,696 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:47:06,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 38 [2021-11-19 04:47:06,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712691835] [2021-11-19 04:47:06,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:47:06,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-19 04:47:06,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:47:06,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-19 04:47:06,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1314, Unknown=0, NotChecked=0, Total=1406 [2021-11-19 04:47:06,697 INFO L87 Difference]: Start difference. First operand 248 states and 292 transitions. Second operand has 38 states, 38 states have (on average 1.5) internal successors, (57), 38 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:07,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:47:07,894 INFO L93 Difference]: Finished difference Result 464 states and 518 transitions. [2021-11-19 04:47:07,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-19 04:47:07,894 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.5) internal successors, (57), 38 states have internal predecessors, (57), 0 states have call successors, (0), 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 34 [2021-11-19 04:47:07,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:47:07,896 INFO L225 Difference]: With dead ends: 464 [2021-11-19 04:47:07,896 INFO L226 Difference]: Without dead ends: 455 [2021-11-19 04:47:07,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=283, Invalid=3377, Unknown=0, NotChecked=0, Total=3660 [2021-11-19 04:47:07,898 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 216 mSDsluCounter, 2217 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 2317 SdHoareTripleChecker+Invalid, 1137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:47:07,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 2317 Invalid, 1137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1100 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 04:47:07,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-11-19 04:47:07,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 257. [2021-11-19 04:47:07,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.1796875) internal successors, (302), 256 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:07,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 302 transitions. [2021-11-19 04:47:07,971 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 302 transitions. Word has length 34 [2021-11-19 04:47:07,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:47:07,971 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 302 transitions. [2021-11-19 04:47:07,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.5) internal successors, (57), 38 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:07,972 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 302 transitions. [2021-11-19 04:47:07,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-19 04:47:07,973 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:47:07,973 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:47:08,004 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-11-19 04:47:08,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-11-19 04:47:08,198 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:47:08,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:47:08,199 INFO L85 PathProgramCache]: Analyzing trace with hash 489303023, now seen corresponding path program 35 times [2021-11-19 04:47:08,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:47:08,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651801981] [2021-11-19 04:47:08,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:47:08,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:47:08,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:47:08,558 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:47:08,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:47:08,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651801981] [2021-11-19 04:47:08,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651801981] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:47:08,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809207103] [2021-11-19 04:47:08,559 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 04:47:08,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:47:08,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:47:08,560 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:47:08,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-19 04:47:08,626 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-19 04:47:08,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:47:08,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-19 04:47:08,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:47:09,114 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:47:09,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:47:09,453 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:47:09,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809207103] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:47:09,453 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:47:09,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 36 [2021-11-19 04:47:09,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764665339] [2021-11-19 04:47:09,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:47:09,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-19 04:47:09,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:47:09,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-19 04:47:09,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1169, Unknown=0, NotChecked=0, Total=1260 [2021-11-19 04:47:09,455 INFO L87 Difference]: Start difference. First operand 257 states and 302 transitions. Second operand has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 36 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:10,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:47:10,439 INFO L93 Difference]: Finished difference Result 364 states and 408 transitions. [2021-11-19 04:47:10,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-19 04:47:10,440 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 36 states have internal predecessors, (56), 0 states have call successors, (0), 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 34 [2021-11-19 04:47:10,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:47:10,442 INFO L225 Difference]: With dead ends: 364 [2021-11-19 04:47:10,442 INFO L226 Difference]: Without dead ends: 340 [2021-11-19 04:47:10,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 47 SyntacticMatches, 7 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=259, Invalid=2821, Unknown=0, NotChecked=0, Total=3080 [2021-11-19 04:47:10,443 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 139 mSDsluCounter, 1239 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 1307 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:47:10,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 1307 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:47:10,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-11-19 04:47:10,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 248. [2021-11-19 04:47:10,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.1821862348178138) internal successors, (292), 247 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:10,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 292 transitions. [2021-11-19 04:47:10,496 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 292 transitions. Word has length 34 [2021-11-19 04:47:10,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:47:10,496 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 292 transitions. [2021-11-19 04:47:10,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 36 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:10,496 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 292 transitions. [2021-11-19 04:47:10,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-19 04:47:10,497 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:47:10,497 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:47:10,536 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-11-19 04:47:10,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-11-19 04:47:10,710 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:47:10,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:47:10,711 INFO L85 PathProgramCache]: Analyzing trace with hash -2122819938, now seen corresponding path program 36 times [2021-11-19 04:47:10,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:47:10,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469180035] [2021-11-19 04:47:10,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:47:10,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:47:10,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:47:10,825 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 04:47:10,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:47:10,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469180035] [2021-11-19 04:47:10,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469180035] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:47:10,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426873172] [2021-11-19 04:47:10,826 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 04:47:10,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:47:10,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:47:10,827 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:47:10,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-19 04:47:10,878 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-19 04:47:10,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:47:10,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 04:47:10,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:47:11,184 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 04:47:11,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:47:11,400 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 04:47:11,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426873172] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:47:11,400 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:47:11,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2021-11-19 04:47:11,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465252975] [2021-11-19 04:47:11,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:47:11,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-19 04:47:11,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:47:11,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-19 04:47:11,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-11-19 04:47:11,402 INFO L87 Difference]: Start difference. First operand 248 states and 292 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:12,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:47:12,207 INFO L93 Difference]: Finished difference Result 359 states and 413 transitions. [2021-11-19 04:47:12,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 04:47:12,207 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 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 34 [2021-11-19 04:47:12,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:47:12,209 INFO L225 Difference]: With dead ends: 359 [2021-11-19 04:47:12,209 INFO L226 Difference]: Without dead ends: 314 [2021-11-19 04:47:12,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=363, Invalid=1277, Unknown=0, NotChecked=0, Total=1640 [2021-11-19 04:47:12,210 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 439 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:47:12,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [439 Valid, 419 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:47:12,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-11-19 04:47:12,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 273. [2021-11-19 04:47:12,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 1.161764705882353) internal successors, (316), 272 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:12,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 316 transitions. [2021-11-19 04:47:12,302 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 316 transitions. Word has length 34 [2021-11-19 04:47:12,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:47:12,302 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 316 transitions. [2021-11-19 04:47:12,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:12,302 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 316 transitions. [2021-11-19 04:47:12,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-19 04:47:12,304 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:47:12,304 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:47:12,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-19 04:47:12,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-11-19 04:47:12,518 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:47:12,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:47:12,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1302431921, now seen corresponding path program 37 times [2021-11-19 04:47:12,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:47:12,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257440721] [2021-11-19 04:47:12,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:47:12,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:47:12,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:47:12,838 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 04:47:12,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:47:12,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257440721] [2021-11-19 04:47:12,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257440721] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:47:12,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652045844] [2021-11-19 04:47:12,838 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 04:47:12,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:47:12,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:47:12,846 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:47:12,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-19 04:47:12,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:47:12,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-19 04:47:12,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:47:13,380 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 04:47:13,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:47:13,627 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 04:47:13,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652045844] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:47:13,628 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:47:13,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 34 [2021-11-19 04:47:13,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223817513] [2021-11-19 04:47:13,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:47:13,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-19 04:47:13,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:47:13,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-19 04:47:13,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1032, Unknown=0, NotChecked=0, Total=1122 [2021-11-19 04:47:13,629 INFO L87 Difference]: Start difference. First operand 273 states and 316 transitions. Second operand has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:14,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:47:14,327 INFO L93 Difference]: Finished difference Result 352 states and 398 transitions. [2021-11-19 04:47:14,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-19 04:47:14,327 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-19 04:47:14,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:47:14,329 INFO L225 Difference]: With dead ends: 352 [2021-11-19 04:47:14,329 INFO L226 Difference]: Without dead ends: 327 [2021-11-19 04:47:14,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 47 SyntacticMatches, 7 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=253, Invalid=2399, Unknown=0, NotChecked=0, Total=2652 [2021-11-19 04:47:14,330 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 123 mSDsluCounter, 790 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:47:14,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 830 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:47:14,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-11-19 04:47:14,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 271. [2021-11-19 04:47:14,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.1666666666666667) internal successors, (315), 270 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:14,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 315 transitions. [2021-11-19 04:47:14,402 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 315 transitions. Word has length 34 [2021-11-19 04:47:14,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:47:14,402 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 315 transitions. [2021-11-19 04:47:14,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:14,403 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 315 transitions. [2021-11-19 04:47:14,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-19 04:47:14,404 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:47:14,404 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:47:14,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-19 04:47:14,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-19 04:47:14,610 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:47:14,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:47:14,611 INFO L85 PathProgramCache]: Analyzing trace with hash -266355998, now seen corresponding path program 38 times [2021-11-19 04:47:14,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:47:14,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963444269] [2021-11-19 04:47:14,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:47:14,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:47:14,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:47:14,746 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 04:47:14,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:47:14,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963444269] [2021-11-19 04:47:14,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963444269] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:47:14,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846552553] [2021-11-19 04:47:14,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:47:14,747 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:47:14,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:47:14,753 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:47:14,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-19 04:47:14,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:47:14,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:47:14,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 04:47:14,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:47:15,044 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 04:47:15,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:47:15,291 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 04:47:15,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846552553] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:47:15,291 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:47:15,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 25 [2021-11-19 04:47:15,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742675057] [2021-11-19 04:47:15,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:47:15,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-19 04:47:15,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:47:15,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-19 04:47:15,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-11-19 04:47:15,293 INFO L87 Difference]: Start difference. First operand 271 states and 315 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:15,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:47:15,861 INFO L93 Difference]: Finished difference Result 318 states and 359 transitions. [2021-11-19 04:47:15,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 04:47:15,862 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 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 34 [2021-11-19 04:47:15,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:47:15,863 INFO L225 Difference]: With dead ends: 318 [2021-11-19 04:47:15,863 INFO L226 Difference]: Without dead ends: 294 [2021-11-19 04:47:15,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=186, Invalid=1004, Unknown=0, NotChecked=0, Total=1190 [2021-11-19 04:47:15,864 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 384 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:47:15,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 681 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:47:15,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-11-19 04:47:15,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 271. [2021-11-19 04:47:15,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.1444444444444444) internal successors, (309), 270 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:15,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 309 transitions. [2021-11-19 04:47:15,953 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 309 transitions. Word has length 34 [2021-11-19 04:47:15,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:47:15,954 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 309 transitions. [2021-11-19 04:47:15,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:15,954 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 309 transitions. [2021-11-19 04:47:15,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-19 04:47:15,955 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:47:15,955 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:47:15,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-19 04:47:16,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-19 04:47:16,170 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:47:16,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:47:16,171 INFO L85 PathProgramCache]: Analyzing trace with hash 535019927, now seen corresponding path program 39 times [2021-11-19 04:47:16,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:47:16,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830633063] [2021-11-19 04:47:16,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:47:16,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:47:16,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:47:16,407 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:47:16,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:47:16,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830633063] [2021-11-19 04:47:16,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830633063] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:47:16,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573025046] [2021-11-19 04:47:16,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:47:16,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:47:16,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:47:16,409 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:47:16,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-19 04:47:16,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-19 04:47:16,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:47:16,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-19 04:47:16,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:47:17,150 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:47:17,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:47:17,507 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:47:17,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573025046] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:47:17,508 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:47:17,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 39 [2021-11-19 04:47:17,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231625342] [2021-11-19 04:47:17,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:47:17,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-19 04:47:17,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:47:17,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-19 04:47:17,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-11-19 04:47:17,510 INFO L87 Difference]: Start difference. First operand 271 states and 309 transitions. Second operand has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 39 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:19,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:47:19,738 INFO L93 Difference]: Finished difference Result 470 states and 520 transitions. [2021-11-19 04:47:19,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-19 04:47:19,738 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 39 states have internal predecessors, (69), 0 states have call successors, (0), 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 35 [2021-11-19 04:47:19,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:47:19,740 INFO L225 Difference]: With dead ends: 470 [2021-11-19 04:47:19,741 INFO L226 Difference]: Without dead ends: 434 [2021-11-19 04:47:19,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1420, Invalid=5386, Unknown=0, NotChecked=0, Total=6806 [2021-11-19 04:47:19,742 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 1435 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1435 SdHoareTripleChecker+Valid, 1016 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:47:19,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1435 Valid, 1016 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:47:19,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-11-19 04:47:19,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 301. [2021-11-19 04:47:19,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 1.1433333333333333) internal successors, (343), 300 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:19,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 343 transitions. [2021-11-19 04:47:19,863 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 343 transitions. Word has length 35 [2021-11-19 04:47:19,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:47:19,863 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 343 transitions. [2021-11-19 04:47:19,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 39 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:19,863 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 343 transitions. [2021-11-19 04:47:19,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-19 04:47:19,864 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:47:19,864 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:47:19,885 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-11-19 04:47:20,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-19 04:47:20,066 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:47:20,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:47:20,067 INFO L85 PathProgramCache]: Analyzing trace with hash -203006442, now seen corresponding path program 40 times [2021-11-19 04:47:20,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:47:20,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598587732] [2021-11-19 04:47:20,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:47:20,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:47:20,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:47:20,315 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:47:20,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:47:20,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598587732] [2021-11-19 04:47:20,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598587732] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:47:20,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427220965] [2021-11-19 04:47:20,316 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 04:47:20,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:47:20,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:47:20,317 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:47:20,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-19 04:47:20,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 04:47:20,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:47:20,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-19 04:47:20,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:47:20,958 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:47:20,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:47:21,341 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:47:21,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427220965] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:47:21,342 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:47:21,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 40 [2021-11-19 04:47:21,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531259384] [2021-11-19 04:47:21,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:47:21,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-19 04:47:21,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:47:21,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-19 04:47:21,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1443, Unknown=0, NotChecked=0, Total=1560 [2021-11-19 04:47:21,344 INFO L87 Difference]: Start difference. First operand 301 states and 343 transitions. Second operand has 40 states, 40 states have (on average 1.75) internal successors, (70), 40 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:22,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:47:22,649 INFO L93 Difference]: Finished difference Result 456 states and 502 transitions. [2021-11-19 04:47:22,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-19 04:47:22,649 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.75) internal successors, (70), 40 states have internal predecessors, (70), 0 states have call successors, (0), 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 35 [2021-11-19 04:47:22,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:47:22,651 INFO L225 Difference]: With dead ends: 456 [2021-11-19 04:47:22,651 INFO L226 Difference]: Without dead ends: 438 [2021-11-19 04:47:22,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=387, Invalid=3035, Unknown=0, NotChecked=0, Total=3422 [2021-11-19 04:47:22,652 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 962 mSDsluCounter, 1991 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 962 SdHoareTripleChecker+Valid, 2089 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:47:22,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [962 Valid, 2089 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:47:22,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-11-19 04:47:22,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 305. [2021-11-19 04:47:22,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 1.1414473684210527) internal successors, (347), 304 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:22,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 347 transitions. [2021-11-19 04:47:22,746 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 347 transitions. Word has length 35 [2021-11-19 04:47:22,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:47:22,746 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 347 transitions. [2021-11-19 04:47:22,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.75) internal successors, (70), 40 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:22,746 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 347 transitions. [2021-11-19 04:47:22,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-19 04:47:22,747 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:47:22,748 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:47:22,769 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-11-19 04:47:22,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:47:22,950 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:47:22,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:47:22,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1280821844, now seen corresponding path program 41 times [2021-11-19 04:47:22,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:47:22,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426559831] [2021-11-19 04:47:22,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:47:22,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:47:22,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:47:23,019 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 04:47:23,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:47:23,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426559831] [2021-11-19 04:47:23,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426559831] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:47:23,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896308723] [2021-11-19 04:47:23,020 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 04:47:23,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:47:23,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:47:23,032 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:47:23,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-19 04:47:23,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-19 04:47:23,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:47:23,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 04:47:23,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:47:23,216 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 04:47:23,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:47:23,293 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 04:47:23,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896308723] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:47:23,293 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:47:23,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-11-19 04:47:23,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617005570] [2021-11-19 04:47:23,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:47:23,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-19 04:47:23,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:47:23,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-19 04:47:23,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-11-19 04:47:23,295 INFO L87 Difference]: Start difference. First operand 305 states and 347 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:23,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:47:23,514 INFO L93 Difference]: Finished difference Result 394 states and 444 transitions. [2021-11-19 04:47:23,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 04:47:23,515 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 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 35 [2021-11-19 04:47:23,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:47:23,517 INFO L225 Difference]: With dead ends: 394 [2021-11-19 04:47:23,517 INFO L226 Difference]: Without dead ends: 314 [2021-11-19 04:47:23,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2021-11-19 04:47:23,519 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 101 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:47:23,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 221 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:47:23,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-11-19 04:47:23,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 291. [2021-11-19 04:47:23,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 1.1344827586206896) internal successors, (329), 290 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:23,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 329 transitions. [2021-11-19 04:47:23,615 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 329 transitions. Word has length 35 [2021-11-19 04:47:23,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:47:23,616 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 329 transitions. [2021-11-19 04:47:23,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:23,616 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 329 transitions. [2021-11-19 04:47:23,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-19 04:47:23,617 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:47:23,617 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:47:23,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-19 04:47:23,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:47:23,830 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:47:23,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:47:23,830 INFO L85 PathProgramCache]: Analyzing trace with hash 365909845, now seen corresponding path program 42 times [2021-11-19 04:47:23,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:47:23,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307871064] [2021-11-19 04:47:23,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:47:23,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:47:23,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:47:23,909 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 04:47:23,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:47:23,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307871064] [2021-11-19 04:47:23,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307871064] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:47:23,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62874081] [2021-11-19 04:47:23,910 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 04:47:23,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:47:23,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:47:23,911 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:47:23,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-19 04:47:23,963 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-19 04:47:23,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:47:23,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 04:47:23,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:47:24,098 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 04:47:24,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:47:24,176 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 04:47:24,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62874081] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:47:24,176 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:47:24,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-11-19 04:47:24,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380525281] [2021-11-19 04:47:24,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:47:24,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-19 04:47:24,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:47:24,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-19 04:47:24,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-11-19 04:47:24,177 INFO L87 Difference]: Start difference. First operand 291 states and 329 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:24,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:47:24,388 INFO L93 Difference]: Finished difference Result 321 states and 356 transitions. [2021-11-19 04:47:24,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 04:47:24,389 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 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 35 [2021-11-19 04:47:24,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:47:24,390 INFO L225 Difference]: With dead ends: 321 [2021-11-19 04:47:24,390 INFO L226 Difference]: Without dead ends: 315 [2021-11-19 04:47:24,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2021-11-19 04:47:24,391 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 46 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:47:24,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 245 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:47:24,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-11-19 04:47:24,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 292. [2021-11-19 04:47:24,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 1.134020618556701) internal successors, (330), 291 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:24,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 330 transitions. [2021-11-19 04:47:24,488 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 330 transitions. Word has length 35 [2021-11-19 04:47:24,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:47:24,488 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 330 transitions. [2021-11-19 04:47:24,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:24,488 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 330 transitions. [2021-11-19 04:47:24,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-19 04:47:24,489 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:47:24,489 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:47:24,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-19 04:47:24,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-11-19 04:47:24,690 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:47:24,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:47:24,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1335594960, now seen corresponding path program 43 times [2021-11-19 04:47:24,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:47:24,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611826046] [2021-11-19 04:47:24,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:47:24,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:47:24,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:47:25,069 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:47:25,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:47:25,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611826046] [2021-11-19 04:47:25,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611826046] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:47:25,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871645555] [2021-11-19 04:47:25,070 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 04:47:25,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:47:25,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:47:25,071 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:47:25,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-19 04:47:25,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:47:25,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-19 04:47:25,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:47:25,589 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:47:25,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:47:25,871 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:47:25,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871645555] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:47:25,872 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:47:25,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 41 [2021-11-19 04:47:25,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048366457] [2021-11-19 04:47:25,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:47:25,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-19 04:47:25,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:47:25,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-19 04:47:25,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1541, Unknown=0, NotChecked=0, Total=1640 [2021-11-19 04:47:25,873 INFO L87 Difference]: Start difference. First operand 292 states and 330 transitions. Second operand has 41 states, 41 states have (on average 1.4634146341463414) internal successors, (60), 41 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:27,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:47:27,152 INFO L93 Difference]: Finished difference Result 540 states and 587 transitions. [2021-11-19 04:47:27,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-19 04:47:27,152 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.4634146341463414) internal successors, (60), 41 states have internal predecessors, (60), 0 states have call successors, (0), 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 36 [2021-11-19 04:47:27,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:47:27,155 INFO L225 Difference]: With dead ends: 540 [2021-11-19 04:47:27,155 INFO L226 Difference]: Without dead ends: 531 [2021-11-19 04:47:27,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=302, Invalid=3988, Unknown=0, NotChecked=0, Total=4290 [2021-11-19 04:47:27,156 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 234 mSDsluCounter, 2884 mSDsCounter, 0 mSdLazyCounter, 1353 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 3001 SdHoareTripleChecker+Invalid, 1392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:47:27,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 3001 Invalid, 1392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1353 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 04:47:27,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-11-19 04:47:27,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 301. [2021-11-19 04:47:27,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 1.1333333333333333) internal successors, (340), 300 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:27,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 340 transitions. [2021-11-19 04:47:27,269 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 340 transitions. Word has length 36 [2021-11-19 04:47:27,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:47:27,269 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 340 transitions. [2021-11-19 04:47:27,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.4634146341463414) internal successors, (60), 41 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:27,269 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 340 transitions. [2021-11-19 04:47:27,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-19 04:47:27,270 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:47:27,271 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:47:27,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-19 04:47:27,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:47:27,501 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:47:27,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:47:27,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1858622864, now seen corresponding path program 44 times [2021-11-19 04:47:27,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:47:27,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551845386] [2021-11-19 04:47:27,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:47:27,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:47:27,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:47:27,825 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:47:27,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:47:27,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551845386] [2021-11-19 04:47:27,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551845386] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:47:27,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186937969] [2021-11-19 04:47:27,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:47:27,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:47:27,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:47:27,827 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:47:27,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-19 04:47:27,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:47:27,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:47:27,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-19 04:47:27,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:47:28,341 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:47:28,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:47:28,620 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:47:28,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186937969] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:47:28,621 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:47:28,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 39 [2021-11-19 04:47:28,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532163825] [2021-11-19 04:47:28,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:47:28,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-19 04:47:28,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:47:28,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-19 04:47:28,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1384, Unknown=0, NotChecked=0, Total=1482 [2021-11-19 04:47:28,622 INFO L87 Difference]: Start difference. First operand 301 states and 340 transitions. Second operand has 39 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 39 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:29,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:47:29,662 INFO L93 Difference]: Finished difference Result 427 states and 465 transitions. [2021-11-19 04:47:29,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-19 04:47:29,662 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 39 states have internal predecessors, (59), 0 states have call successors, (0), 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 36 [2021-11-19 04:47:29,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:47:29,665 INFO L225 Difference]: With dead ends: 427 [2021-11-19 04:47:29,665 INFO L226 Difference]: Without dead ends: 402 [2021-11-19 04:47:29,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 50 SyntacticMatches, 7 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=277, Invalid=3383, Unknown=0, NotChecked=0, Total=3660 [2021-11-19 04:47:29,666 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 158 mSDsluCounter, 2298 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 2387 SdHoareTripleChecker+Invalid, 1244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:47:29,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 2387 Invalid, 1244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1206 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:47:29,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-11-19 04:47:29,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 292. [2021-11-19 04:47:29,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 1.134020618556701) internal successors, (330), 291 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:29,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 330 transitions. [2021-11-19 04:47:29,754 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 330 transitions. Word has length 36 [2021-11-19 04:47:29,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:47:29,754 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 330 transitions. [2021-11-19 04:47:29,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 39 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:29,755 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 330 transitions. [2021-11-19 04:47:29,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-19 04:47:29,755 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:47:29,756 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:47:29,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-11-19 04:47:29,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:47:29,982 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:47:29,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:47:29,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1659359184, now seen corresponding path program 45 times [2021-11-19 04:47:29,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:47:29,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918457577] [2021-11-19 04:47:29,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:47:29,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:47:29,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:47:30,327 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 04:47:30,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:47:30,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918457577] [2021-11-19 04:47:30,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918457577] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:47:30,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803106395] [2021-11-19 04:47:30,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:47:30,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:47:30,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:47:30,334 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:47:30,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-19 04:47:30,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-19 04:47:30,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:47:30,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-19 04:47:30,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:47:30,903 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 04:47:30,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:47:31,149 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 04:47:31,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803106395] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:47:31,149 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:47:31,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 37 [2021-11-19 04:47:31,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883311591] [2021-11-19 04:47:31,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:47:31,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-19 04:47:31,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:47:31,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-19 04:47:31,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1235, Unknown=0, NotChecked=0, Total=1332 [2021-11-19 04:47:31,151 INFO L87 Difference]: Start difference. First operand 292 states and 330 transitions. Second operand has 37 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 37 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:31,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:47:31,942 INFO L93 Difference]: Finished difference Result 352 states and 389 transitions. [2021-11-19 04:47:31,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-19 04:47:31,943 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 37 states have internal predecessors, (57), 0 states have call successors, (0), 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 36 [2021-11-19 04:47:31,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:47:31,944 INFO L225 Difference]: With dead ends: 352 [2021-11-19 04:47:31,944 INFO L226 Difference]: Without dead ends: 326 [2021-11-19 04:47:31,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 50 SyntacticMatches, 7 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=271, Invalid=2921, Unknown=0, NotChecked=0, Total=3192 [2021-11-19 04:47:31,945 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 111 mSDsluCounter, 1176 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 1231 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:47:31,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 1231 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:47:31,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-11-19 04:47:32,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 281. [2021-11-19 04:47:32,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 1.1357142857142857) internal successors, (318), 280 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:32,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 318 transitions. [2021-11-19 04:47:32,018 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 318 transitions. Word has length 36 [2021-11-19 04:47:32,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:47:32,019 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 318 transitions. [2021-11-19 04:47:32,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 37 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:32,019 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 318 transitions. [2021-11-19 04:47:32,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-19 04:47:32,019 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:47:32,020 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:47:32,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-19 04:47:32,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:47:32,226 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:47:32,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:47:32,227 INFO L85 PathProgramCache]: Analyzing trace with hash 59566704, now seen corresponding path program 46 times [2021-11-19 04:47:32,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:47:32,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084588375] [2021-11-19 04:47:32,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:47:32,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:47:32,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:47:32,505 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 04:47:32,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:47:32,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084588375] [2021-11-19 04:47:32,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084588375] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:47:32,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80325502] [2021-11-19 04:47:32,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 04:47:32,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:47:32,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:47:32,506 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:47:32,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-19 04:47:32,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 04:47:32,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:47:32,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-19 04:47:32,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:47:33,003 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 04:47:33,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:47:33,240 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 04:47:33,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80325502] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:47:33,241 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:47:33,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 35 [2021-11-19 04:47:33,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024578064] [2021-11-19 04:47:33,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:47:33,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-19 04:47:33,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:47:33,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-19 04:47:33,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1094, Unknown=0, NotChecked=0, Total=1190 [2021-11-19 04:47:33,242 INFO L87 Difference]: Start difference. First operand 281 states and 318 transitions. Second operand has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 35 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:33,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:47:33,876 INFO L93 Difference]: Finished difference Result 324 states and 363 transitions. [2021-11-19 04:47:33,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-19 04:47:33,876 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 35 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-19 04:47:33,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:47:33,877 INFO L225 Difference]: With dead ends: 324 [2021-11-19 04:47:33,877 INFO L226 Difference]: Without dead ends: 318 [2021-11-19 04:47:33,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 50 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=265, Invalid=2491, Unknown=0, NotChecked=0, Total=2756 [2021-11-19 04:47:33,878 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 109 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:47:33,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 472 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:47:33,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-11-19 04:47:33,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 293. [2021-11-19 04:47:33,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 1.1369863013698631) internal successors, (332), 292 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:33,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 332 transitions. [2021-11-19 04:47:33,962 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 332 transitions. Word has length 36 [2021-11-19 04:47:33,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:47:33,962 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 332 transitions. [2021-11-19 04:47:33,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 35 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:33,962 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 332 transitions. [2021-11-19 04:47:33,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-19 04:47:33,963 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:47:33,963 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:47:33,988 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-11-19 04:47:34,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-11-19 04:47:34,173 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:47:34,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:47:34,173 INFO L85 PathProgramCache]: Analyzing trace with hash -2086100650, now seen corresponding path program 47 times [2021-11-19 04:47:34,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:47:34,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768563507] [2021-11-19 04:47:34,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:47:34,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:47:34,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:47:34,425 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:47:34,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:47:34,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768563507] [2021-11-19 04:47:34,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768563507] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:47:34,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001479221] [2021-11-19 04:47:34,426 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 04:47:34,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:47:34,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:47:34,429 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:47:34,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-19 04:47:34,470 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-19 04:47:34,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:47:34,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-19 04:47:34,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:47:35,093 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:47:35,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:47:35,529 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:47:35,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001479221] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:47:35,529 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:47:35,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 44 [2021-11-19 04:47:35,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117924501] [2021-11-19 04:47:35,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:47:35,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-19 04:47:35,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:47:35,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-19 04:47:35,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1771, Unknown=0, NotChecked=0, Total=1892 [2021-11-19 04:47:35,531 INFO L87 Difference]: Start difference. First operand 293 states and 332 transitions. Second operand has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 44 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:38,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:47:38,496 INFO L93 Difference]: Finished difference Result 520 states and 571 transitions. [2021-11-19 04:47:38,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-19 04:47:38,496 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 44 states have internal predecessors, (74), 0 states have call successors, (0), 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 37 [2021-11-19 04:47:38,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:47:38,498 INFO L225 Difference]: With dead ends: 520 [2021-11-19 04:47:38,498 INFO L226 Difference]: Without dead ends: 482 [2021-11-19 04:47:38,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1593 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2002, Invalid=7700, Unknown=0, NotChecked=0, Total=9702 [2021-11-19 04:47:38,499 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 1626 mSDsluCounter, 1324 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1626 SdHoareTripleChecker+Valid, 1400 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:47:38,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1626 Valid, 1400 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:47:38,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-11-19 04:47:38,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 324. [2021-11-19 04:47:38,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 1.1362229102167183) internal successors, (367), 323 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) [2021-11-19 04:47:38,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 367 transitions. [2021-11-19 04:47:38,626 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 367 transitions. Word has length 37 [2021-11-19 04:47:38,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:47:38,627 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 367 transitions. [2021-11-19 04:47:38,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 44 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:38,627 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 367 transitions. [2021-11-19 04:47:38,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-19 04:47:38,628 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:47:38,628 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:47:38,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-11-19 04:47:38,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:47:38,846 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:47:38,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:47:38,846 INFO L85 PathProgramCache]: Analyzing trace with hash 804885687, now seen corresponding path program 48 times [2021-11-19 04:47:38,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:47:38,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109763427] [2021-11-19 04:47:38,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:47:38,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:47:38,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:47:39,105 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:47:39,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:47:39,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109763427] [2021-11-19 04:47:39,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109763427] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:47:39,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569765828] [2021-11-19 04:47:39,106 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 04:47:39,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:47:39,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:47:39,106 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:47:39,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-19 04:47:39,149 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-19 04:47:39,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:47:39,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-19 04:47:39,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:47:39,765 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:47:39,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:47:40,169 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:47:40,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569765828] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:47:40,170 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:47:40,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 45 [2021-11-19 04:47:40,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351534474] [2021-11-19 04:47:40,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:47:40,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-19 04:47:40,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:47:40,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-19 04:47:40,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1848, Unknown=0, NotChecked=0, Total=1980 [2021-11-19 04:47:40,171 INFO L87 Difference]: Start difference. First operand 324 states and 367 transitions. Second operand has 45 states, 45 states have (on average 1.6666666666666667) internal successors, (75), 45 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:41,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:47:41,777 INFO L93 Difference]: Finished difference Result 505 states and 552 transitions. [2021-11-19 04:47:41,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-19 04:47:41,778 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.6666666666666667) internal successors, (75), 45 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-19 04:47:41,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:47:41,780 INFO L225 Difference]: With dead ends: 505 [2021-11-19 04:47:41,780 INFO L226 Difference]: Without dead ends: 486 [2021-11-19 04:47:41,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=466, Invalid=3956, Unknown=0, NotChecked=0, Total=4422 [2021-11-19 04:47:41,781 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 1299 mSDsluCounter, 3007 mSDsCounter, 0 mSdLazyCounter, 1248 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1299 SdHoareTripleChecker+Valid, 3121 SdHoareTripleChecker+Invalid, 1320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:47:41,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1299 Valid, 3121 Invalid, 1320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1248 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 04:47:41,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-11-19 04:47:41,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 328. [2021-11-19 04:47:41,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 1.1345565749235473) internal successors, (371), 327 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:41,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 371 transitions. [2021-11-19 04:47:41,914 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 371 transitions. Word has length 37 [2021-11-19 04:47:41,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:47:41,914 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 371 transitions. [2021-11-19 04:47:41,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.6666666666666667) internal successors, (75), 45 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:41,915 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 371 transitions. [2021-11-19 04:47:41,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-19 04:47:41,915 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:47:41,916 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:47:41,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-11-19 04:47:42,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:47:42,134 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:47:42,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:47:42,135 INFO L85 PathProgramCache]: Analyzing trace with hash -847136075, now seen corresponding path program 49 times [2021-11-19 04:47:42,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:47:42,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671745674] [2021-11-19 04:47:42,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:47:42,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:47:42,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:47:42,208 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 04:47:42,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:47:42,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671745674] [2021-11-19 04:47:42,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671745674] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:47:42,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060770275] [2021-11-19 04:47:42,209 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 04:47:42,209 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:47:42,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:47:42,218 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:47:42,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-19 04:47:42,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:47:42,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 04:47:42,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:47:42,389 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 04:47:42,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:47:42,460 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 04:47:42,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060770275] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:47:42,460 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:47:42,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 19 [2021-11-19 04:47:42,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421769255] [2021-11-19 04:47:42,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:47:42,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 04:47:42,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:47:42,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 04:47:42,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-11-19 04:47:42,461 INFO L87 Difference]: Start difference. First operand 328 states and 371 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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) [2021-11-19 04:47:42,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:47:42,802 INFO L93 Difference]: Finished difference Result 404 states and 454 transitions. [2021-11-19 04:47:42,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-19 04:47:42,803 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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 37 [2021-11-19 04:47:42,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:47:42,805 INFO L225 Difference]: With dead ends: 404 [2021-11-19 04:47:42,805 INFO L226 Difference]: Without dead ends: 389 [2021-11-19 04:47:42,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=551, Unknown=0, NotChecked=0, Total=756 [2021-11-19 04:47:42,806 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 152 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:47:42,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 213 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:47:42,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-11-19 04:47:42,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 356. [2021-11-19 04:47:42,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 1.1492957746478873) internal successors, (408), 355 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:42,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 408 transitions. [2021-11-19 04:47:42,952 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 408 transitions. Word has length 37 [2021-11-19 04:47:42,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:47:42,952 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 408 transitions. [2021-11-19 04:47:42,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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) [2021-11-19 04:47:42,953 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 408 transitions. [2021-11-19 04:47:42,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-19 04:47:42,954 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:47:42,954 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:47:42,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-11-19 04:47:43,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:47:43,170 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:47:43,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:47:43,170 INFO L85 PathProgramCache]: Analyzing trace with hash 855363028, now seen corresponding path program 50 times [2021-11-19 04:47:43,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:47:43,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769276351] [2021-11-19 04:47:43,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:47:43,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:47:43,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:47:43,246 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 04:47:43,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:47:43,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769276351] [2021-11-19 04:47:43,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769276351] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:47:43,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784312910] [2021-11-19 04:47:43,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:47:43,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:47:43,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:47:43,248 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:47:43,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-19 04:47:43,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:47:43,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:47:43,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 04:47:43,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:47:43,427 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 04:47:43,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:47:43,490 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 04:47:43,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784312910] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:47:43,491 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:47:43,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 19 [2021-11-19 04:47:43,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442126533] [2021-11-19 04:47:43,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:47:43,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 04:47:43,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:47:43,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 04:47:43,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-11-19 04:47:43,492 INFO L87 Difference]: Start difference. First operand 356 states and 408 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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) [2021-11-19 04:47:43,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:47:43,840 INFO L93 Difference]: Finished difference Result 685 states and 794 transitions. [2021-11-19 04:47:43,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-19 04:47:43,840 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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 37 [2021-11-19 04:47:43,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:47:43,842 INFO L225 Difference]: With dead ends: 685 [2021-11-19 04:47:43,843 INFO L226 Difference]: Without dead ends: 561 [2021-11-19 04:47:43,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=551, Unknown=0, NotChecked=0, Total=756 [2021-11-19 04:47:43,843 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 307 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:47:43,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 400 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:47:43,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-11-19 04:47:43,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 414. [2021-11-19 04:47:43,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 1.1501210653753027) internal successors, (475), 413 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:43,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 475 transitions. [2021-11-19 04:47:43,991 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 475 transitions. Word has length 37 [2021-11-19 04:47:43,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:47:43,991 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 475 transitions. [2021-11-19 04:47:43,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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) [2021-11-19 04:47:43,992 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 475 transitions. [2021-11-19 04:47:43,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-19 04:47:43,993 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:47:43,993 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:47:44,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-11-19 04:47:44,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-11-19 04:47:44,218 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:47:44,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:47:44,219 INFO L85 PathProgramCache]: Analyzing trace with hash -155710033, now seen corresponding path program 51 times [2021-11-19 04:47:44,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:47:44,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340234482] [2021-11-19 04:47:44,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:47:44,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:47:44,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:47:44,657 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:47:44,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:47:44,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340234482] [2021-11-19 04:47:44,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340234482] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:47:44,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026680790] [2021-11-19 04:47:44,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:47:44,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:47:44,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:47:44,658 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:47:44,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-19 04:47:44,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-19 04:47:44,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:47:44,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-19 04:47:44,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:47:45,232 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:47:45,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:47:45,512 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:47:45,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026680790] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:47:45,513 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:47:45,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 44 [2021-11-19 04:47:45,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261401460] [2021-11-19 04:47:45,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:47:45,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-19 04:47:45,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:47:45,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-19 04:47:45,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1786, Unknown=0, NotChecked=0, Total=1892 [2021-11-19 04:47:45,514 INFO L87 Difference]: Start difference. First operand 414 states and 475 transitions. Second operand has 44 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 44 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:47,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:47:47,134 INFO L93 Difference]: Finished difference Result 761 states and 834 transitions. [2021-11-19 04:47:47,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-19 04:47:47,135 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 44 states have internal predecessors, (63), 0 states have call successors, (0), 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 [2021-11-19 04:47:47,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:47:47,138 INFO L225 Difference]: With dead ends: 761 [2021-11-19 04:47:47,138 INFO L226 Difference]: Without dead ends: 752 [2021-11-19 04:47:47,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=321, Invalid=4649, Unknown=0, NotChecked=0, Total=4970 [2021-11-19 04:47:47,138 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 260 mSDsluCounter, 3918 mSDsCounter, 0 mSdLazyCounter, 1887 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 4052 SdHoareTripleChecker+Invalid, 1930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:47:47,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 4052 Invalid, 1930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1887 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 04:47:47,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2021-11-19 04:47:47,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 423. [2021-11-19 04:47:47,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 1.1492890995260663) internal successors, (485), 422 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:47,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 485 transitions. [2021-11-19 04:47:47,279 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 485 transitions. Word has length 38 [2021-11-19 04:47:47,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:47:47,279 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 485 transitions. [2021-11-19 04:47:47,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 44 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:47,279 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 485 transitions. [2021-11-19 04:47:47,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-19 04:47:47,280 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:47:47,281 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:47:47,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-11-19 04:47:47,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:47:47,482 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:47:47,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:47:47,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1493827249, now seen corresponding path program 52 times [2021-11-19 04:47:47,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:47:47,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456330503] [2021-11-19 04:47:47,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:47:47,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:47:47,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:47:47,923 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:47:47,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:47:47,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456330503] [2021-11-19 04:47:47,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456330503] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:47:47,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488143736] [2021-11-19 04:47:47,923 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 04:47:47,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:47:47,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:47:47,925 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:47:47,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-19 04:47:47,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 04:47:47,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:47:47,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-19 04:47:47,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:47:48,640 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:47:48,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:47:48,942 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:47:48,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488143736] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:47:48,943 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:47:48,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 42 [2021-11-19 04:47:48,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737452368] [2021-11-19 04:47:48,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:47:48,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-19 04:47:48,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:47:48,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-19 04:47:48,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1617, Unknown=0, NotChecked=0, Total=1722 [2021-11-19 04:47:48,944 INFO L87 Difference]: Start difference. First operand 423 states and 485 transitions. Second operand has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 42 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:50,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:47:50,243 INFO L93 Difference]: Finished difference Result 623 states and 684 transitions. [2021-11-19 04:47:50,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-19 04:47:50,243 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 42 states have internal predecessors, (62), 0 states have call successors, (0), 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 [2021-11-19 04:47:50,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:47:50,245 INFO L225 Difference]: With dead ends: 623 [2021-11-19 04:47:50,245 INFO L226 Difference]: Without dead ends: 597 [2021-11-19 04:47:50,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=295, Invalid=3995, Unknown=0, NotChecked=0, Total=4290 [2021-11-19 04:47:50,246 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 173 mSDsluCounter, 2729 mSDsCounter, 0 mSdLazyCounter, 1395 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 2831 SdHoareTripleChecker+Invalid, 1434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:47:50,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 2831 Invalid, 1434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1395 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 04:47:50,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-11-19 04:47:50,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 414. [2021-11-19 04:47:50,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 1.1501210653753027) internal successors, (475), 413 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:50,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 475 transitions. [2021-11-19 04:47:50,387 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 475 transitions. Word has length 38 [2021-11-19 04:47:50,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:47:50,387 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 475 transitions. [2021-11-19 04:47:50,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 42 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:50,388 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 475 transitions. [2021-11-19 04:47:50,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-19 04:47:50,389 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:47:50,389 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:47:50,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-11-19 04:47:50,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-11-19 04:47:50,590 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:47:50,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:47:50,591 INFO L85 PathProgramCache]: Analyzing trace with hash -375561937, now seen corresponding path program 53 times [2021-11-19 04:47:50,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:47:50,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935105128] [2021-11-19 04:47:50,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:47:50,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:47:50,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:47:50,990 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 04:47:50,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:47:50,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935105128] [2021-11-19 04:47:50,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935105128] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:47:50,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014990685] [2021-11-19 04:47:50,991 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 04:47:50,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:47:50,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:47:50,992 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:47:51,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-11-19 04:47:51,045 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-19 04:47:51,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:47:51,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-19 04:47:51,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:47:51,622 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 04:47:51,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:47:51,887 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 04:47:51,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014990685] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:47:51,887 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:47:51,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 40 [2021-11-19 04:47:51,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294891047] [2021-11-19 04:47:51,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:47:51,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-19 04:47:51,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:47:51,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-19 04:47:51,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1456, Unknown=0, NotChecked=0, Total=1560 [2021-11-19 04:47:51,889 INFO L87 Difference]: Start difference. First operand 414 states and 475 transitions. Second operand has 40 states, 40 states have (on average 1.5) internal successors, (60), 40 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:52,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:47:52,901 INFO L93 Difference]: Finished difference Result 530 states and 590 transitions. [2021-11-19 04:47:52,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-19 04:47:52,901 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.5) internal successors, (60), 40 states have internal predecessors, (60), 0 states have call successors, (0), 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 [2021-11-19 04:47:52,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:47:52,903 INFO L225 Difference]: With dead ends: 530 [2021-11-19 04:47:52,903 INFO L226 Difference]: Without dead ends: 503 [2021-11-19 04:47:52,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=289, Invalid=3493, Unknown=0, NotChecked=0, Total=3782 [2021-11-19 04:47:52,904 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 142 mSDsluCounter, 1455 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 1523 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:47:52,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 1523 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:47:52,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-11-19 04:47:53,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 403. [2021-11-19 04:47:53,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 1.1517412935323383) internal successors, (463), 402 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:53,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 463 transitions. [2021-11-19 04:47:53,038 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 463 transitions. Word has length 38 [2021-11-19 04:47:53,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:47:53,038 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 463 transitions. [2021-11-19 04:47:53,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.5) internal successors, (60), 40 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:53,039 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 463 transitions. [2021-11-19 04:47:53,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-19 04:47:53,039 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:47:53,040 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:47:53,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-11-19 04:47:53,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:47:53,250 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:47:53,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:47:53,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1552999778, now seen corresponding path program 54 times [2021-11-19 04:47:53,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:47:53,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146278941] [2021-11-19 04:47:53,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:47:53,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:47:53,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:47:53,396 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 04:47:53,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:47:53,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146278941] [2021-11-19 04:47:53,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146278941] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:47:53,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196464109] [2021-11-19 04:47:53,396 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 04:47:53,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:47:53,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:47:53,397 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:47:53,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-11-19 04:47:53,441 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-19 04:47:53,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:47:53,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-19 04:47:53,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:47:53,727 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 04:47:53,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:47:53,932 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 04:47:53,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196464109] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:47:53,932 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:47:53,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2021-11-19 04:47:53,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875105936] [2021-11-19 04:47:53,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:47:53,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-19 04:47:53,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:47:53,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-19 04:47:53,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2021-11-19 04:47:53,934 INFO L87 Difference]: Start difference. First operand 403 states and 463 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:54,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:47:54,952 INFO L93 Difference]: Finished difference Result 556 states and 629 transitions. [2021-11-19 04:47:54,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-19 04:47:54,953 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 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 [2021-11-19 04:47:54,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:47:54,955 INFO L225 Difference]: With dead ends: 556 [2021-11-19 04:47:54,955 INFO L226 Difference]: Without dead ends: 502 [2021-11-19 04:47:54,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=617, Invalid=2245, Unknown=0, NotChecked=0, Total=2862 [2021-11-19 04:47:54,956 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 714 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 714 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:47:54,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [714 Valid, 706 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:47:54,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-11-19 04:47:55,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 446. [2021-11-19 04:47:55,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 1.1348314606741574) internal successors, (505), 445 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:55,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 505 transitions. [2021-11-19 04:47:55,094 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 505 transitions. Word has length 38 [2021-11-19 04:47:55,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:47:55,094 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 505 transitions. [2021-11-19 04:47:55,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:55,095 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 505 transitions. [2021-11-19 04:47:55,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-19 04:47:55,095 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:47:55,096 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:47:55,116 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-11-19 04:47:55,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:47:55,296 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:47:55,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:47:55,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1465831985, now seen corresponding path program 55 times [2021-11-19 04:47:55,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:47:55,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782075061] [2021-11-19 04:47:55,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:47:55,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:47:55,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:47:55,574 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 04:47:55,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:47:55,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782075061] [2021-11-19 04:47:55,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782075061] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:47:55,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821073247] [2021-11-19 04:47:55,575 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 04:47:55,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:47:55,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:47:55,575 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:47:55,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-11-19 04:47:55,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:47:55,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-19 04:47:55,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:47:56,153 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 04:47:56,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:47:56,503 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 04:47:56,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821073247] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:47:56,504 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:47:56,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 38 [2021-11-19 04:47:56,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236032061] [2021-11-19 04:47:56,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:47:56,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-19 04:47:56,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:47:56,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-19 04:47:56,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1303, Unknown=0, NotChecked=0, Total=1406 [2021-11-19 04:47:56,505 INFO L87 Difference]: Start difference. First operand 446 states and 505 transitions. Second operand has 38 states, 38 states have (on average 1.5263157894736843) internal successors, (58), 38 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:57,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:47:57,440 INFO L93 Difference]: Finished difference Result 532 states and 594 transitions. [2021-11-19 04:47:57,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-19 04:47:57,440 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.5263157894736843) internal successors, (58), 38 states have internal predecessors, (58), 0 states have call successors, (0), 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 [2021-11-19 04:47:57,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:47:57,442 INFO L225 Difference]: With dead ends: 532 [2021-11-19 04:47:57,442 INFO L226 Difference]: Without dead ends: 504 [2021-11-19 04:47:57,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=283, Invalid=3023, Unknown=0, NotChecked=0, Total=3306 [2021-11-19 04:47:57,443 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 124 mSDsluCounter, 832 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 872 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:47:57,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 872 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:47:57,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-11-19 04:47:57,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 443. [2021-11-19 04:47:57,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 1.1380090497737556) internal successors, (503), 442 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:57,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 503 transitions. [2021-11-19 04:47:57,586 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 503 transitions. Word has length 38 [2021-11-19 04:47:57,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:47:57,586 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 503 transitions. [2021-11-19 04:47:57,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.5263157894736843) internal successors, (58), 38 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:57,586 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 503 transitions. [2021-11-19 04:47:57,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-19 04:47:57,587 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:47:57,587 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:47:57,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-11-19 04:47:57,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-11-19 04:47:57,790 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:47:57,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:47:57,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1135200674, now seen corresponding path program 56 times [2021-11-19 04:47:57,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:47:57,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350502812] [2021-11-19 04:47:57,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:47:57,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:47:57,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:47:57,928 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 04:47:57,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:47:57,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350502812] [2021-11-19 04:47:57,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350502812] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:47:57,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606876023] [2021-11-19 04:47:57,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:47:57,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:47:57,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:47:57,929 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:47:57,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-11-19 04:47:57,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:47:57,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:47:57,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-19 04:47:57,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:47:58,286 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 04:47:58,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:47:58,528 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 04:47:58,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606876023] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:47:58,529 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:47:58,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2021-11-19 04:47:58,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360754586] [2021-11-19 04:47:58,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:47:58,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-19 04:47:58,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:47:58,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-19 04:47:58,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-11-19 04:47:58,530 INFO L87 Difference]: Start difference. First operand 443 states and 503 transitions. Second operand has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:59,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:47:59,399 INFO L93 Difference]: Finished difference Result 505 states and 561 transitions. [2021-11-19 04:47:59,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 04:47:59,399 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-19 04:47:59,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:47:59,401 INFO L225 Difference]: With dead ends: 505 [2021-11-19 04:47:59,401 INFO L226 Difference]: Without dead ends: 476 [2021-11-19 04:47:59,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=247, Invalid=1559, Unknown=0, NotChecked=0, Total=1806 [2021-11-19 04:47:59,401 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 490 mSDsluCounter, 1120 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 1193 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:47:59,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [490 Valid, 1193 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:47:59,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-11-19 04:47:59,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 443. [2021-11-19 04:47:59,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 1.1199095022624435) internal successors, (495), 442 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:59,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 495 transitions. [2021-11-19 04:47:59,542 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 495 transitions. Word has length 38 [2021-11-19 04:47:59,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:47:59,542 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 495 transitions. [2021-11-19 04:47:59,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:47:59,542 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 495 transitions. [2021-11-19 04:47:59,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-19 04:47:59,543 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:47:59,543 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:47:59,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-11-19 04:47:59,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:47:59,758 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:47:59,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:47:59,759 INFO L85 PathProgramCache]: Analyzing trace with hash 130593719, now seen corresponding path program 57 times [2021-11-19 04:47:59,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:47:59,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245932200] [2021-11-19 04:47:59,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:47:59,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:47:59,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:48:00,063 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:48:00,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:48:00,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245932200] [2021-11-19 04:48:00,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245932200] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:48:00,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519595595] [2021-11-19 04:48:00,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:48:00,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:48:00,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:48:00,064 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:48:00,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-11-19 04:48:00,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-19 04:48:00,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:48:00,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-19 04:48:00,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:48:00,798 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:48:00,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:48:01,245 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:48:01,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519595595] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:48:01,245 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:48:01,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 49 [2021-11-19 04:48:01,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340114143] [2021-11-19 04:48:01,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:48:01,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-19 04:48:01,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:48:01,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-19 04:48:01,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2217, Unknown=0, NotChecked=0, Total=2352 [2021-11-19 04:48:01,247 INFO L87 Difference]: Start difference. First operand 443 states and 495 transitions. Second operand has 49 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 49 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:05,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:48:05,285 INFO L93 Difference]: Finished difference Result 768 states and 835 transitions. [2021-11-19 04:48:05,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-11-19 04:48:05,286 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 49 states have internal predecessors, (79), 0 states have call successors, (0), 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 39 [2021-11-19 04:48:05,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:48:05,288 INFO L225 Difference]: With dead ends: 768 [2021-11-19 04:48:05,288 INFO L226 Difference]: Without dead ends: 726 [2021-11-19 04:48:05,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2317 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2728, Invalid=10612, Unknown=0, NotChecked=0, Total=13340 [2021-11-19 04:48:05,289 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 2266 mSDsluCounter, 1483 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2266 SdHoareTripleChecker+Valid, 1568 SdHoareTripleChecker+Invalid, 1048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:48:05,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2266 Valid, 1568 Invalid, 1048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 929 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:48:05,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2021-11-19 04:48:05,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 490. [2021-11-19 04:48:05,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 1.1186094069529653) internal successors, (547), 489 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:05,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 547 transitions. [2021-11-19 04:48:05,469 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 547 transitions. Word has length 39 [2021-11-19 04:48:05,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:48:05,470 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 547 transitions. [2021-11-19 04:48:05,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 49 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:05,470 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 547 transitions. [2021-11-19 04:48:05,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-19 04:48:05,471 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:48:05,471 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:48:05,503 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-11-19 04:48:05,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:48:05,686 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:48:05,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:48:05,686 INFO L85 PathProgramCache]: Analyzing trace with hash -443143050, now seen corresponding path program 58 times [2021-11-19 04:48:05,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:48:05,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046047395] [2021-11-19 04:48:05,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:48:05,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:48:05,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:48:05,968 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:48:05,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:48:05,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046047395] [2021-11-19 04:48:05,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046047395] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:48:05,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282117289] [2021-11-19 04:48:05,969 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 04:48:05,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:48:05,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:48:05,970 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:48:05,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-11-19 04:48:06,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 04:48:06,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:48:06,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-19 04:48:06,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:48:06,696 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:48:06,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:48:07,225 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:48:07,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282117289] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:48:07,225 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:48:07,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 50 [2021-11-19 04:48:07,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832483375] [2021-11-19 04:48:07,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:48:07,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-19 04:48:07,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:48:07,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-19 04:48:07,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2303, Unknown=0, NotChecked=0, Total=2450 [2021-11-19 04:48:07,227 INFO L87 Difference]: Start difference. First operand 490 states and 547 transitions. Second operand has 50 states, 50 states have (on average 1.6) internal successors, (80), 50 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:09,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:48:09,352 INFO L93 Difference]: Finished difference Result 752 states and 814 transitions. [2021-11-19 04:48:09,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-19 04:48:09,353 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.6) internal successors, (80), 50 states have internal predecessors, (80), 0 states have call successors, (0), 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 39 [2021-11-19 04:48:09,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:48:09,355 INFO L225 Difference]: With dead ends: 752 [2021-11-19 04:48:09,355 INFO L226 Difference]: Without dead ends: 731 [2021-11-19 04:48:09,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=551, Invalid=4999, Unknown=0, NotChecked=0, Total=5550 [2021-11-19 04:48:09,356 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 1534 mSDsluCounter, 3487 mSDsCounter, 0 mSdLazyCounter, 1326 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1534 SdHoareTripleChecker+Valid, 3617 SdHoareTripleChecker+Invalid, 1398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:48:09,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1534 Valid, 3617 Invalid, 1398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1326 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 04:48:09,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2021-11-19 04:48:09,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 495. [2021-11-19 04:48:09,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 1.1174089068825912) internal successors, (552), 494 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:09,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 552 transitions. [2021-11-19 04:48:09,520 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 552 transitions. Word has length 39 [2021-11-19 04:48:09,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:48:09,521 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 552 transitions. [2021-11-19 04:48:09,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.6) internal successors, (80), 50 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:09,521 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 552 transitions. [2021-11-19 04:48:09,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-19 04:48:09,521 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:48:09,522 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:48:09,542 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-11-19 04:48:09,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-11-19 04:48:09,722 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:48:09,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:48:09,722 INFO L85 PathProgramCache]: Analyzing trace with hash -24932840, now seen corresponding path program 59 times [2021-11-19 04:48:09,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:48:09,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721349697] [2021-11-19 04:48:09,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:48:09,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:48:09,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:48:09,804 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-19 04:48:09,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:48:09,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721349697] [2021-11-19 04:48:09,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721349697] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:48:09,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267060276] [2021-11-19 04:48:09,804 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 04:48:09,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:48:09,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:48:09,806 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:48:09,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-11-19 04:48:09,848 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-19 04:48:09,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:48:09,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 04:48:09,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:48:09,968 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-19 04:48:09,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:48:10,054 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-19 04:48:10,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267060276] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:48:10,054 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:48:10,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2021-11-19 04:48:10,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047919734] [2021-11-19 04:48:10,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:48:10,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 04:48:10,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:48:10,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 04:48:10,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2021-11-19 04:48:10,056 INFO L87 Difference]: Start difference. First operand 495 states and 552 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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) [2021-11-19 04:48:10,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:48:10,394 INFO L93 Difference]: Finished difference Result 622 states and 690 transitions. [2021-11-19 04:48:10,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-19 04:48:10,394 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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 39 [2021-11-19 04:48:10,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:48:10,396 INFO L225 Difference]: With dead ends: 622 [2021-11-19 04:48:10,396 INFO L226 Difference]: Without dead ends: 514 [2021-11-19 04:48:10,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=304, Invalid=566, Unknown=0, NotChecked=0, Total=870 [2021-11-19 04:48:10,397 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 140 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:48:10,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 525 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:48:10,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-11-19 04:48:10,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 481. [2021-11-19 04:48:10,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 1.1125) internal successors, (534), 480 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:10,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 534 transitions. [2021-11-19 04:48:10,561 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 534 transitions. Word has length 39 [2021-11-19 04:48:10,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:48:10,562 INFO L470 AbstractCegarLoop]: Abstraction has 481 states and 534 transitions. [2021-11-19 04:48:10,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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) [2021-11-19 04:48:10,562 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 534 transitions. [2021-11-19 04:48:10,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-19 04:48:10,562 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:48:10,563 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:48:10,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-11-19 04:48:10,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-11-19 04:48:10,763 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:48:10,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:48:10,763 INFO L85 PathProgramCache]: Analyzing trace with hash -601397259, now seen corresponding path program 60 times [2021-11-19 04:48:10,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:48:10,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824828979] [2021-11-19 04:48:10,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:48:10,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:48:10,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:48:10,856 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-19 04:48:10,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:48:10,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824828979] [2021-11-19 04:48:10,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824828979] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:48:10,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586290117] [2021-11-19 04:48:10,857 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 04:48:10,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:48:10,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:48:10,862 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:48:10,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-11-19 04:48:10,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-19 04:48:10,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:48:10,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 04:48:10,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:48:11,080 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-19 04:48:11,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:48:11,164 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-19 04:48:11,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586290117] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:48:11,165 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:48:11,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2021-11-19 04:48:11,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036727412] [2021-11-19 04:48:11,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:48:11,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 04:48:11,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:48:11,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 04:48:11,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2021-11-19 04:48:11,166 INFO L87 Difference]: Start difference. First operand 481 states and 534 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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) [2021-11-19 04:48:11,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:48:11,586 INFO L93 Difference]: Finished difference Result 521 states and 570 transitions. [2021-11-19 04:48:11,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-19 04:48:11,590 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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 39 [2021-11-19 04:48:11,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:48:11,593 INFO L225 Difference]: With dead ends: 521 [2021-11-19 04:48:11,593 INFO L226 Difference]: Without dead ends: 515 [2021-11-19 04:48:11,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=304, Invalid=566, Unknown=0, NotChecked=0, Total=870 [2021-11-19 04:48:11,594 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 71 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:48:11,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 261 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:48:11,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-11-19 04:48:11,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 482. [2021-11-19 04:48:11,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 1.1122661122661122) internal successors, (535), 481 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:11,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 535 transitions. [2021-11-19 04:48:11,757 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 535 transitions. Word has length 39 [2021-11-19 04:48:11,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:48:11,757 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 535 transitions. [2021-11-19 04:48:11,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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) [2021-11-19 04:48:11,757 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 535 transitions. [2021-11-19 04:48:11,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-19 04:48:11,758 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:48:11,758 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:48:11,779 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-11-19 04:48:11,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-11-19 04:48:11,958 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:48:11,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:48:11,959 INFO L85 PathProgramCache]: Analyzing trace with hash -189895216, now seen corresponding path program 61 times [2021-11-19 04:48:11,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:48:11,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353494922] [2021-11-19 04:48:11,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:48:11,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:48:11,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:48:12,464 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:48:12,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:48:12,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353494922] [2021-11-19 04:48:12,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353494922] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:48:12,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142969073] [2021-11-19 04:48:12,464 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 04:48:12,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:48:12,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:48:12,465 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:48:12,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-11-19 04:48:12,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:48:12,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-19 04:48:12,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:48:13,078 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:48:13,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:48:13,376 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:48:13,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142969073] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:48:13,377 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:48:13,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 47 [2021-11-19 04:48:13,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221845743] [2021-11-19 04:48:13,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:48:13,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-19 04:48:13,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:48:13,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-19 04:48:13,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=2049, Unknown=0, NotChecked=0, Total=2162 [2021-11-19 04:48:13,378 INFO L87 Difference]: Start difference. First operand 482 states and 535 transitions. Second operand has 47 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 47 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:15,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:48:15,356 INFO L93 Difference]: Finished difference Result 872 states and 936 transitions. [2021-11-19 04:48:15,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-19 04:48:15,357 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 47 states have internal predecessors, (66), 0 states have call successors, (0), 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 40 [2021-11-19 04:48:15,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:48:15,361 INFO L225 Difference]: With dead ends: 872 [2021-11-19 04:48:15,361 INFO L226 Difference]: Without dead ends: 863 [2021-11-19 04:48:15,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 58 SyntacticMatches, 5 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1018 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=340, Invalid=5360, Unknown=0, NotChecked=0, Total=5700 [2021-11-19 04:48:15,362 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 274 mSDsluCounter, 4729 mSDsCounter, 0 mSdLazyCounter, 2201 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 4880 SdHoareTripleChecker+Invalid, 2246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 2201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 04:48:15,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 4880 Invalid, 2246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 2201 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 04:48:15,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2021-11-19 04:48:15,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 491. [2021-11-19 04:48:15,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 1.1122448979591837) internal successors, (545), 490 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:15,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 545 transitions. [2021-11-19 04:48:15,522 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 545 transitions. Word has length 40 [2021-11-19 04:48:15,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:48:15,522 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 545 transitions. [2021-11-19 04:48:15,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 47 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:15,522 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 545 transitions. [2021-11-19 04:48:15,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-19 04:48:15,523 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:48:15,523 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:48:15,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-11-19 04:48:15,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:48:15,724 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:48:15,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:48:15,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1171113072, now seen corresponding path program 62 times [2021-11-19 04:48:15,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:48:15,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386842740] [2021-11-19 04:48:15,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:48:15,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:48:15,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:48:16,137 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:48:16,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:48:16,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386842740] [2021-11-19 04:48:16,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386842740] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:48:16,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442639667] [2021-11-19 04:48:16,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:48:16,137 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:48:16,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:48:16,138 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:48:16,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-11-19 04:48:16,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:48:16,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:48:16,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-19 04:48:16,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:48:16,776 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:48:16,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:48:17,073 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:48:17,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442639667] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:48:17,074 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:48:17,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 45 [2021-11-19 04:48:17,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238437937] [2021-11-19 04:48:17,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:48:17,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-19 04:48:17,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:48:17,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-19 04:48:17,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1868, Unknown=0, NotChecked=0, Total=1980 [2021-11-19 04:48:17,075 INFO L87 Difference]: Start difference. First operand 491 states and 545 transitions. Second operand has 45 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 45 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:18,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:48:18,731 INFO L93 Difference]: Finished difference Result 719 states and 772 transitions. [2021-11-19 04:48:18,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-19 04:48:18,732 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 45 states have internal predecessors, (65), 0 states have call successors, (0), 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 40 [2021-11-19 04:48:18,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:48:18,734 INFO L225 Difference]: With dead ends: 719 [2021-11-19 04:48:18,734 INFO L226 Difference]: Without dead ends: 692 [2021-11-19 04:48:18,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 56 SyntacticMatches, 7 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=313, Invalid=4657, Unknown=0, NotChecked=0, Total=4970 [2021-11-19 04:48:18,735 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 194 mSDsluCounter, 3565 mSDsCounter, 0 mSdLazyCounter, 1795 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 3688 SdHoareTripleChecker+Invalid, 1837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:48:18,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 3688 Invalid, 1837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1795 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 04:48:18,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-11-19 04:48:18,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 482. [2021-11-19 04:48:18,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 1.1122661122661122) internal successors, (535), 481 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:18,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 535 transitions. [2021-11-19 04:48:18,910 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 535 transitions. Word has length 40 [2021-11-19 04:48:18,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:48:18,911 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 535 transitions. [2021-11-19 04:48:18,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 45 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:18,911 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 535 transitions. [2021-11-19 04:48:18,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-19 04:48:18,911 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:48:18,911 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:48:18,932 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-11-19 04:48:19,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:48:19,114 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:48:19,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:48:19,115 INFO L85 PathProgramCache]: Analyzing trace with hash 722054608, now seen corresponding path program 63 times [2021-11-19 04:48:19,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:48:19,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957751778] [2021-11-19 04:48:19,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:48:19,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:48:19,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:48:19,529 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 04:48:19,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:48:19,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957751778] [2021-11-19 04:48:19,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957751778] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:48:19,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354753693] [2021-11-19 04:48:19,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:48:19,530 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:48:19,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:48:19,531 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:48:19,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-11-19 04:48:19,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-19 04:48:19,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:48:19,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-19 04:48:19,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:48:20,141 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 04:48:20,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:48:20,428 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 04:48:20,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354753693] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:48:20,428 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:48:20,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 43 [2021-11-19 04:48:20,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516435476] [2021-11-19 04:48:20,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:48:20,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-19 04:48:20,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:48:20,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-19 04:48:20,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1695, Unknown=0, NotChecked=0, Total=1806 [2021-11-19 04:48:20,430 INFO L87 Difference]: Start difference. First operand 482 states and 535 transitions. Second operand has 43 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 43 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:21,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:48:21,725 INFO L93 Difference]: Finished difference Result 617 states and 669 transitions. [2021-11-19 04:48:21,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-19 04:48:21,726 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 43 states have internal predecessors, (63), 0 states have call successors, (0), 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 40 [2021-11-19 04:48:21,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:48:21,728 INFO L225 Difference]: With dead ends: 617 [2021-11-19 04:48:21,728 INFO L226 Difference]: Without dead ends: 589 [2021-11-19 04:48:21,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 56 SyntacticMatches, 7 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=307, Invalid=4115, Unknown=0, NotChecked=0, Total=4422 [2021-11-19 04:48:21,729 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 160 mSDsluCounter, 2279 mSDsCounter, 0 mSdLazyCounter, 1282 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 2368 SdHoareTripleChecker+Invalid, 1327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:48:21,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 2368 Invalid, 1327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1282 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 04:48:21,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-11-19 04:48:21,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 471. [2021-11-19 04:48:21,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 1.1127659574468085) internal successors, (523), 470 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:21,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 523 transitions. [2021-11-19 04:48:21,889 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 523 transitions. Word has length 40 [2021-11-19 04:48:21,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:48:21,889 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 523 transitions. [2021-11-19 04:48:21,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 43 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:21,889 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 523 transitions. [2021-11-19 04:48:21,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-19 04:48:21,890 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:48:21,890 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:48:21,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-11-19 04:48:22,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:48:22,090 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:48:22,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:48:22,091 INFO L85 PathProgramCache]: Analyzing trace with hash -923927664, now seen corresponding path program 64 times [2021-11-19 04:48:22,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:48:22,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708050389] [2021-11-19 04:48:22,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:48:22,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:48:22,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:48:22,449 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 04:48:22,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:48:22,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708050389] [2021-11-19 04:48:22,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708050389] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:48:22,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635721403] [2021-11-19 04:48:22,450 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 04:48:22,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:48:22,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:48:22,450 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:48:22,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-11-19 04:48:22,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 04:48:22,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:48:22,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-19 04:48:22,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:48:23,041 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 04:48:23,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:48:23,314 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 04:48:23,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635721403] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:48:23,314 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:48:23,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 41 [2021-11-19 04:48:23,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14583317] [2021-11-19 04:48:23,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:48:23,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-19 04:48:23,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:48:23,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-19 04:48:23,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1530, Unknown=0, NotChecked=0, Total=1640 [2021-11-19 04:48:23,315 INFO L87 Difference]: Start difference. First operand 471 states and 523 transitions. Second operand has 41 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 41 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:24,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:48:24,339 INFO L93 Difference]: Finished difference Result 535 states and 586 transitions. [2021-11-19 04:48:24,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-19 04:48:24,339 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 41 states have internal predecessors, (61), 0 states have call successors, (0), 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 40 [2021-11-19 04:48:24,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:48:24,341 INFO L225 Difference]: With dead ends: 535 [2021-11-19 04:48:24,341 INFO L226 Difference]: Without dead ends: 506 [2021-11-19 04:48:24,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 56 SyntacticMatches, 7 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=301, Invalid=3605, Unknown=0, NotChecked=0, Total=3906 [2021-11-19 04:48:24,342 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 111 mSDsluCounter, 1349 mSDsCounter, 0 mSdLazyCounter, 923 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 1404 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:48:24,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 1404 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 923 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:48:24,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-11-19 04:48:24,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 458. [2021-11-19 04:48:24,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 1.113785557986871) internal successors, (509), 457 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:24,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 509 transitions. [2021-11-19 04:48:24,498 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 509 transitions. Word has length 40 [2021-11-19 04:48:24,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:48:24,498 INFO L470 AbstractCegarLoop]: Abstraction has 458 states and 509 transitions. [2021-11-19 04:48:24,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 41 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:24,498 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 509 transitions. [2021-11-19 04:48:24,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-19 04:48:24,499 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:48:24,500 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:48:24,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-11-19 04:48:24,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-11-19 04:48:24,714 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:48:24,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:48:24,715 INFO L85 PathProgramCache]: Analyzing trace with hash 137817552, now seen corresponding path program 65 times [2021-11-19 04:48:24,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:48:24,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916394552] [2021-11-19 04:48:24,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:48:24,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:48:24,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:48:25,063 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 04:48:25,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:48:25,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916394552] [2021-11-19 04:48:25,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916394552] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:48:25,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260583897] [2021-11-19 04:48:25,063 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 04:48:25,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:48:25,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:48:25,066 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:48:25,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-11-19 04:48:25,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-19 04:48:25,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:48:25,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-19 04:48:25,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:48:25,817 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 04:48:25,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:48:26,139 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 04:48:26,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260583897] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:48:26,139 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:48:26,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 39 [2021-11-19 04:48:26,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674664689] [2021-11-19 04:48:26,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:48:26,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-19 04:48:26,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:48:26,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-19 04:48:26,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-11-19 04:48:26,141 INFO L87 Difference]: Start difference. First operand 458 states and 509 transitions. Second operand has 39 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 39 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:26,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:48:26,973 INFO L93 Difference]: Finished difference Result 504 states and 557 transitions. [2021-11-19 04:48:26,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-19 04:48:26,973 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 39 states have internal predecessors, (59), 0 states have call successors, (0), 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 40 [2021-11-19 04:48:26,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:48:26,975 INFO L225 Difference]: With dead ends: 504 [2021-11-19 04:48:26,975 INFO L226 Difference]: Without dead ends: 498 [2021-11-19 04:48:26,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 56 SyntacticMatches, 7 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=295, Invalid=3127, Unknown=0, NotChecked=0, Total=3422 [2021-11-19 04:48:26,976 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 99 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:48:26,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 553 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:48:26,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-11-19 04:48:27,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 471. [2021-11-19 04:48:27,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 1.1148936170212767) internal successors, (524), 470 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:27,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 524 transitions. [2021-11-19 04:48:27,135 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 524 transitions. Word has length 40 [2021-11-19 04:48:27,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:48:27,135 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 524 transitions. [2021-11-19 04:48:27,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 39 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:27,136 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 524 transitions. [2021-11-19 04:48:27,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-19 04:48:27,136 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:48:27,136 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:48:27,157 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2021-11-19 04:48:27,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:48:27,337 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:48:27,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:48:27,337 INFO L85 PathProgramCache]: Analyzing trace with hash -929146954, now seen corresponding path program 66 times [2021-11-19 04:48:27,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:48:27,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881950607] [2021-11-19 04:48:27,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:48:27,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:48:27,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:48:27,618 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:48:27,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:48:27,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881950607] [2021-11-19 04:48:27,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881950607] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:48:27,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474834210] [2021-11-19 04:48:27,619 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 04:48:27,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:48:27,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:48:27,620 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:48:27,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-11-19 04:48:27,677 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-19 04:48:27,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:48:27,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-19 04:48:27,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:48:28,451 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:48:28,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:48:28,984 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:48:28,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474834210] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:48:28,984 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:48:28,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 54 [2021-11-19 04:48:28,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985660973] [2021-11-19 04:48:28,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:48:28,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-19 04:48:28,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:48:28,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-19 04:48:28,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2713, Unknown=0, NotChecked=0, Total=2862 [2021-11-19 04:48:28,985 INFO L87 Difference]: Start difference. First operand 471 states and 524 transitions. Second operand has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:34,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:48:34,289 INFO L93 Difference]: Finished difference Result 834 states and 902 transitions. [2021-11-19 04:48:34,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-11-19 04:48:34,289 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 0 states have call successors, (0), 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 41 [2021-11-19 04:48:34,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:48:34,292 INFO L225 Difference]: With dead ends: 834 [2021-11-19 04:48:34,292 INFO L226 Difference]: Without dead ends: 790 [2021-11-19 04:48:34,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3257 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=3617, Invalid=14205, Unknown=0, NotChecked=0, Total=17822 [2021-11-19 04:48:34,293 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 2604 mSDsluCounter, 1881 mSDsCounter, 0 mSdLazyCounter, 1209 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2604 SdHoareTripleChecker+Valid, 1974 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:48:34,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2604 Valid, 1974 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1209 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 04:48:34,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2021-11-19 04:48:34,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 519. [2021-11-19 04:48:34,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 518 states have (on average 1.113899613899614) internal successors, (577), 518 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:34,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 577 transitions. [2021-11-19 04:48:34,478 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 577 transitions. Word has length 41 [2021-11-19 04:48:34,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:48:34,479 INFO L470 AbstractCegarLoop]: Abstraction has 519 states and 577 transitions. [2021-11-19 04:48:34,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:34,479 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 577 transitions. [2021-11-19 04:48:34,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-19 04:48:34,479 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:48:34,480 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:48:34,500 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-11-19 04:48:34,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:48:34,680 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:48:34,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:48:34,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1535117609, now seen corresponding path program 67 times [2021-11-19 04:48:34,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:48:34,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391769959] [2021-11-19 04:48:34,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:48:34,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:48:34,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:48:35,041 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:48:35,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:48:35,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391769959] [2021-11-19 04:48:35,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391769959] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:48:35,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414583417] [2021-11-19 04:48:35,041 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 04:48:35,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:48:35,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:48:35,042 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:48:35,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-11-19 04:48:35,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:48:35,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-19 04:48:35,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:48:35,909 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:48:35,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:48:36,487 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:48:36,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414583417] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:48:36,487 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:48:36,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 55 [2021-11-19 04:48:36,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927459885] [2021-11-19 04:48:36,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:48:36,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-19 04:48:36,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:48:36,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-19 04:48:36,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2808, Unknown=0, NotChecked=0, Total=2970 [2021-11-19 04:48:36,488 INFO L87 Difference]: Start difference. First operand 519 states and 577 transitions. Second operand has 55 states, 55 states have (on average 1.5454545454545454) internal successors, (85), 55 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) [2021-11-19 04:48:39,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:48:39,097 INFO L93 Difference]: Finished difference Result 817 states and 880 transitions. [2021-11-19 04:48:39,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-19 04:48:39,098 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.5454545454545454) internal successors, (85), 55 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) Word has length 41 [2021-11-19 04:48:39,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:48:39,100 INFO L225 Difference]: With dead ends: 817 [2021-11-19 04:48:39,101 INFO L226 Difference]: Without dead ends: 795 [2021-11-19 04:48:39,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=642, Invalid=6164, Unknown=0, NotChecked=0, Total=6806 [2021-11-19 04:48:39,101 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 1835 mSDsluCounter, 4586 mSDsCounter, 0 mSdLazyCounter, 1758 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1835 SdHoareTripleChecker+Valid, 4732 SdHoareTripleChecker+Invalid, 1834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:48:39,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1835 Valid, 4732 Invalid, 1834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1758 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 04:48:39,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2021-11-19 04:48:39,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 524. [2021-11-19 04:48:39,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 1.112810707456979) internal successors, (582), 523 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:39,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 582 transitions. [2021-11-19 04:48:39,295 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 582 transitions. Word has length 41 [2021-11-19 04:48:39,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:48:39,295 INFO L470 AbstractCegarLoop]: Abstraction has 524 states and 582 transitions. [2021-11-19 04:48:39,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.5454545454545454) internal successors, (85), 55 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) [2021-11-19 04:48:39,295 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 582 transitions. [2021-11-19 04:48:39,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-19 04:48:39,296 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:48:39,296 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:48:39,318 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-11-19 04:48:39,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-11-19 04:48:39,496 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:48:39,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:48:39,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1578640213, now seen corresponding path program 68 times [2021-11-19 04:48:39,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:48:39,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882873438] [2021-11-19 04:48:39,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:48:39,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:48:39,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:48:39,577 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-19 04:48:39,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:48:39,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882873438] [2021-11-19 04:48:39,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882873438] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:48:39,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438098855] [2021-11-19 04:48:39,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:48:39,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:48:39,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:48:39,578 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:48:39,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-11-19 04:48:39,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:48:39,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:48:39,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 04:48:39,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:48:39,764 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-19 04:48:39,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:48:39,837 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-19 04:48:39,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438098855] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:48:39,837 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:48:39,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 22 [2021-11-19 04:48:39,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890056281] [2021-11-19 04:48:39,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:48:39,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-19 04:48:39,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:48:39,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-19 04:48:39,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-11-19 04:48:39,838 INFO L87 Difference]: Start difference. First operand 524 states and 582 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:40,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:48:40,322 INFO L93 Difference]: Finished difference Result 618 states and 684 transitions. [2021-11-19 04:48:40,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-19 04:48:40,322 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 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 41 [2021-11-19 04:48:40,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:48:40,324 INFO L225 Difference]: With dead ends: 618 [2021-11-19 04:48:40,325 INFO L226 Difference]: Without dead ends: 602 [2021-11-19 04:48:40,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=933, Unknown=0, NotChecked=0, Total=1260 [2021-11-19 04:48:40,325 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 190 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:48:40,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 309 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:48:40,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-11-19 04:48:40,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 558. [2021-11-19 04:48:40,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 1.125673249551167) internal successors, (627), 557 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:40,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 627 transitions. [2021-11-19 04:48:40,530 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 627 transitions. Word has length 41 [2021-11-19 04:48:40,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:48:40,530 INFO L470 AbstractCegarLoop]: Abstraction has 558 states and 627 transitions. [2021-11-19 04:48:40,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:40,531 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 627 transitions. [2021-11-19 04:48:40,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-19 04:48:40,531 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:48:40,531 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:48:40,552 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2021-11-19 04:48:40,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-11-19 04:48:40,732 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:48:40,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:48:40,732 INFO L85 PathProgramCache]: Analyzing trace with hash 888112408, now seen corresponding path program 69 times [2021-11-19 04:48:40,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:48:40,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650614809] [2021-11-19 04:48:40,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:48:40,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:48:40,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:48:40,832 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-19 04:48:40,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:48:40,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650614809] [2021-11-19 04:48:40,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650614809] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:48:40,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650404500] [2021-11-19 04:48:40,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:48:40,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:48:40,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:48:40,833 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:48:40,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-11-19 04:48:40,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-19 04:48:40,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:48:40,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 04:48:40,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:48:41,030 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-19 04:48:41,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:48:41,124 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-19 04:48:41,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650404500] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:48:41,124 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:48:41,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 22 [2021-11-19 04:48:41,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402712180] [2021-11-19 04:48:41,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:48:41,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-19 04:48:41,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:48:41,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-19 04:48:41,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-11-19 04:48:41,126 INFO L87 Difference]: Start difference. First operand 558 states and 627 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:41,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:48:41,797 INFO L93 Difference]: Finished difference Result 996 states and 1135 transitions. [2021-11-19 04:48:41,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-19 04:48:41,798 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 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 41 [2021-11-19 04:48:41,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:48:41,801 INFO L225 Difference]: With dead ends: 996 [2021-11-19 04:48:41,801 INFO L226 Difference]: Without dead ends: 834 [2021-11-19 04:48:41,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=933, Unknown=0, NotChecked=0, Total=1260 [2021-11-19 04:48:41,802 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 321 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:48:41,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 465 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:48:41,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2021-11-19 04:48:42,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 640. [2021-11-19 04:48:42,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 1.1267605633802817) internal successors, (720), 639 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:42,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 720 transitions. [2021-11-19 04:48:42,046 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 720 transitions. Word has length 41 [2021-11-19 04:48:42,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:48:42,046 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 720 transitions. [2021-11-19 04:48:42,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:42,046 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 720 transitions. [2021-11-19 04:48:42,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-19 04:48:42,047 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:48:42,047 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:48:42,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-11-19 04:48:42,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:48:42,248 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:48:42,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:48:42,248 INFO L85 PathProgramCache]: Analyzing trace with hash 318631823, now seen corresponding path program 70 times [2021-11-19 04:48:42,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:48:42,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747852145] [2021-11-19 04:48:42,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:48:42,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:48:42,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:48:42,791 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:48:42,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:48:42,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747852145] [2021-11-19 04:48:42,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747852145] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:48:42,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809463183] [2021-11-19 04:48:42,792 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 04:48:42,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:48:42,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:48:42,793 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:48:42,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-11-19 04:48:42,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 04:48:42,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:48:42,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-19 04:48:42,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:48:43,488 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:48:43,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:48:43,805 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:48:43,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809463183] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:48:43,805 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:48:43,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 50 [2021-11-19 04:48:43,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386627766] [2021-11-19 04:48:43,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:48:43,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-19 04:48:43,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:48:43,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-19 04:48:43,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=2330, Unknown=0, NotChecked=0, Total=2450 [2021-11-19 04:48:43,806 INFO L87 Difference]: Start difference. First operand 640 states and 720 transitions. Second operand has 50 states, 50 states have (on average 1.38) internal successors, (69), 50 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:46,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:48:46,113 INFO L93 Difference]: Finished difference Result 1165 states and 1259 transitions. [2021-11-19 04:48:46,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-19 04:48:46,113 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.38) internal successors, (69), 50 states have internal predecessors, (69), 0 states have call successors, (0), 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 42 [2021-11-19 04:48:46,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:48:46,117 INFO L225 Difference]: With dead ends: 1165 [2021-11-19 04:48:46,117 INFO L226 Difference]: Without dead ends: 1156 [2021-11-19 04:48:46,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 61 SyntacticMatches, 5 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=359, Invalid=6121, Unknown=0, NotChecked=0, Total=6480 [2021-11-19 04:48:46,118 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 301 mSDsluCounter, 5128 mSDsCounter, 0 mSdLazyCounter, 2281 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 5296 SdHoareTripleChecker+Invalid, 2330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 2281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 04:48:46,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 5296 Invalid, 2330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 2281 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 04:48:46,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2021-11-19 04:48:46,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 649. [2021-11-19 04:48:46,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 1.126543209876543) internal successors, (730), 648 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:46,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 730 transitions. [2021-11-19 04:48:46,394 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 730 transitions. Word has length 42 [2021-11-19 04:48:46,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:48:46,394 INFO L470 AbstractCegarLoop]: Abstraction has 649 states and 730 transitions. [2021-11-19 04:48:46,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.38) internal successors, (69), 50 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:46,395 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 730 transitions. [2021-11-19 04:48:46,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-19 04:48:46,396 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:48:46,396 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:48:46,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-11-19 04:48:46,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:48:46,610 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:48:46,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:48:46,611 INFO L85 PathProgramCache]: Analyzing trace with hash -225136977, now seen corresponding path program 71 times [2021-11-19 04:48:46,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:48:46,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967911039] [2021-11-19 04:48:46,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:48:46,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:48:46,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:48:47,171 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:48:47,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:48:47,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967911039] [2021-11-19 04:48:47,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967911039] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:48:47,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145502113] [2021-11-19 04:48:47,172 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 04:48:47,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:48:47,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:48:47,173 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:48:47,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-11-19 04:48:47,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-19 04:48:47,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:48:47,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-19 04:48:47,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:48:47,860 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:48:47,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:48:48,177 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:48:48,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145502113] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:48:48,177 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:48:48,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 48 [2021-11-19 04:48:48,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061409385] [2021-11-19 04:48:48,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:48:48,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-19 04:48:48,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:48:48,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-19 04:48:48,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=2137, Unknown=0, NotChecked=0, Total=2256 [2021-11-19 04:48:48,180 INFO L87 Difference]: Start difference. First operand 649 states and 730 transitions. Second operand has 48 states, 48 states have (on average 1.4166666666666667) internal successors, (68), 48 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:50,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:48:50,289 INFO L93 Difference]: Finished difference Result 983 states and 1063 transitions. [2021-11-19 04:48:50,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-19 04:48:50,289 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.4166666666666667) internal successors, (68), 48 states have internal predecessors, (68), 0 states have call successors, (0), 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 42 [2021-11-19 04:48:50,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:48:50,293 INFO L225 Difference]: With dead ends: 983 [2021-11-19 04:48:50,293 INFO L226 Difference]: Without dead ends: 955 [2021-11-19 04:48:50,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 59 SyntacticMatches, 7 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=331, Invalid=5369, Unknown=0, NotChecked=0, Total=5700 [2021-11-19 04:48:50,294 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 219 mSDsluCounter, 4540 mSDsCounter, 0 mSdLazyCounter, 2264 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 4676 SdHoareTripleChecker+Invalid, 2309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 2264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 04:48:50,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 4676 Invalid, 2309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 2264 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 04:48:50,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2021-11-19 04:48:50,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 640. [2021-11-19 04:48:50,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 1.1267605633802817) internal successors, (720), 639 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:50,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 720 transitions. [2021-11-19 04:48:50,531 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 720 transitions. Word has length 42 [2021-11-19 04:48:50,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:48:50,531 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 720 transitions. [2021-11-19 04:48:50,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.4166666666666667) internal successors, (68), 48 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:50,531 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 720 transitions. [2021-11-19 04:48:50,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-19 04:48:50,532 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:48:50,532 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:48:50,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-11-19 04:48:50,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:48:50,733 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:48:50,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:48:50,733 INFO L85 PathProgramCache]: Analyzing trace with hash -284040433, now seen corresponding path program 72 times [2021-11-19 04:48:50,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:48:50,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252934200] [2021-11-19 04:48:50,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:48:50,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:48:50,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:48:51,191 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 04:48:51,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:48:51,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252934200] [2021-11-19 04:48:51,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252934200] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:48:51,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786922181] [2021-11-19 04:48:51,191 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 04:48:51,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:48:51,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:48:51,192 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:48:51,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-11-19 04:48:51,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-19 04:48:51,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:48:51,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-19 04:48:51,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:48:51,877 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 04:48:51,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:48:52,188 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 04:48:52,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786922181] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:48:52,189 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:48:52,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 46 [2021-11-19 04:48:52,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149763690] [2021-11-19 04:48:52,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:48:52,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-19 04:48:52,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:48:52,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-19 04:48:52,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1952, Unknown=0, NotChecked=0, Total=2070 [2021-11-19 04:48:52,190 INFO L87 Difference]: Start difference. First operand 640 states and 720 transitions. Second operand has 46 states, 46 states have (on average 1.434782608695652) internal successors, (66), 46 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:53,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:48:53,853 INFO L93 Difference]: Finished difference Result 853 states and 932 transitions. [2021-11-19 04:48:53,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-19 04:48:53,854 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.434782608695652) internal successors, (66), 46 states have internal predecessors, (66), 0 states have call successors, (0), 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 42 [2021-11-19 04:48:53,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:48:53,857 INFO L225 Difference]: With dead ends: 853 [2021-11-19 04:48:53,857 INFO L226 Difference]: Without dead ends: 824 [2021-11-19 04:48:53,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 59 SyntacticMatches, 7 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=325, Invalid=4787, Unknown=0, NotChecked=0, Total=5112 [2021-11-19 04:48:53,858 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 179 mSDsluCounter, 2608 mSDsCounter, 0 mSdLazyCounter, 1420 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 2710 SdHoareTripleChecker+Invalid, 1465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:48:53,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 2710 Invalid, 1465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1420 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 04:48:53,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2021-11-19 04:48:54,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 629. [2021-11-19 04:48:54,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 1.127388535031847) internal successors, (708), 628 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:54,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 708 transitions. [2021-11-19 04:48:54,080 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 708 transitions. Word has length 42 [2021-11-19 04:48:54,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:48:54,080 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 708 transitions. [2021-11-19 04:48:54,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.434782608695652) internal successors, (66), 46 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:54,081 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 708 transitions. [2021-11-19 04:48:54,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-19 04:48:54,081 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:48:54,081 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:48:54,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-11-19 04:48:54,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:48:54,282 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:48:54,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:48:54,282 INFO L85 PathProgramCache]: Analyzing trace with hash -2122368209, now seen corresponding path program 73 times [2021-11-19 04:48:54,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:48:54,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900349940] [2021-11-19 04:48:54,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:48:54,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:48:54,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:48:54,649 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 04:48:54,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:48:54,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900349940] [2021-11-19 04:48:54,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900349940] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:48:54,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374938812] [2021-11-19 04:48:54,650 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 04:48:54,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:48:54,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:48:54,651 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:48:54,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-11-19 04:48:54,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:48:54,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-19 04:48:54,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:48:55,305 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 04:48:55,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:48:55,603 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 04:48:55,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374938812] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:48:55,603 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:48:55,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 44 [2021-11-19 04:48:55,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760289171] [2021-11-19 04:48:55,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:48:55,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-19 04:48:55,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:48:55,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-19 04:48:55,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1775, Unknown=0, NotChecked=0, Total=1892 [2021-11-19 04:48:55,604 INFO L87 Difference]: Start difference. First operand 629 states and 708 transitions. Second operand has 44 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 44 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) [2021-11-19 04:48:57,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:48:57,008 INFO L93 Difference]: Finished difference Result 754 states and 832 transitions. [2021-11-19 04:48:57,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-19 04:48:57,009 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 44 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) Word has length 42 [2021-11-19 04:48:57,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:48:57,011 INFO L225 Difference]: With dead ends: 754 [2021-11-19 04:48:57,011 INFO L226 Difference]: Without dead ends: 724 [2021-11-19 04:48:57,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 59 SyntacticMatches, 7 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=319, Invalid=4237, Unknown=0, NotChecked=0, Total=4556 [2021-11-19 04:48:57,012 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 142 mSDsluCounter, 1606 mSDsCounter, 0 mSdLazyCounter, 1059 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 1674 SdHoareTripleChecker+Invalid, 1107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:48:57,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 1674 Invalid, 1107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1059 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:48:57,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2021-11-19 04:48:57,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 616. [2021-11-19 04:48:57,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 615 states have (on average 1.1284552845528455) internal successors, (694), 615 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:57,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 694 transitions. [2021-11-19 04:48:57,228 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 694 transitions. Word has length 42 [2021-11-19 04:48:57,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:48:57,228 INFO L470 AbstractCegarLoop]: Abstraction has 616 states and 694 transitions. [2021-11-19 04:48:57,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 44 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) [2021-11-19 04:48:57,228 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 694 transitions. [2021-11-19 04:48:57,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-19 04:48:57,229 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:48:57,229 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:48:57,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-11-19 04:48:57,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:48:57,429 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:48:57,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:48:57,430 INFO L85 PathProgramCache]: Analyzing trace with hash -147720610, now seen corresponding path program 74 times [2021-11-19 04:48:57,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:48:57,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072616472] [2021-11-19 04:48:57,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:48:57,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:48:57,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:48:57,592 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-19 04:48:57,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:48:57,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072616472] [2021-11-19 04:48:57,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072616472] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:48:57,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673635435] [2021-11-19 04:48:57,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:48:57,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:48:57,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:48:57,593 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:48:57,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-11-19 04:48:57,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:48:57,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:48:57,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-19 04:48:57,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:48:57,997 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-19 04:48:57,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:48:58,256 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-19 04:48:58,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673635435] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:48:58,256 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:48:58,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 34 [2021-11-19 04:48:58,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527510018] [2021-11-19 04:48:58,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:48:58,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-19 04:48:58,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:48:58,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-19 04:48:58,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1029, Unknown=0, NotChecked=0, Total=1122 [2021-11-19 04:48:58,257 INFO L87 Difference]: Start difference. First operand 616 states and 694 transitions. Second operand has 34 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 34 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:59,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:48:59,960 INFO L93 Difference]: Finished difference Result 816 states and 910 transitions. [2021-11-19 04:48:59,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-19 04:48:59,961 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 34 states have internal predecessors, (56), 0 states have call successors, (0), 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 42 [2021-11-19 04:48:59,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:48:59,964 INFO L225 Difference]: With dead ends: 816 [2021-11-19 04:48:59,964 INFO L226 Difference]: Without dead ends: 753 [2021-11-19 04:48:59,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=964, Invalid=3592, Unknown=0, NotChecked=0, Total=4556 [2021-11-19 04:48:59,965 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 1081 mSDsluCounter, 910 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1081 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:48:59,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1081 Valid, 974 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:48:59,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2021-11-19 04:49:00,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 681. [2021-11-19 04:49:00,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 680 states have (on average 1.1147058823529412) internal successors, (758), 680 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:00,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 758 transitions. [2021-11-19 04:49:00,236 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 758 transitions. Word has length 42 [2021-11-19 04:49:00,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:49:00,236 INFO L470 AbstractCegarLoop]: Abstraction has 681 states and 758 transitions. [2021-11-19 04:49:00,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 34 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:00,236 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 758 transitions. [2021-11-19 04:49:00,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-19 04:49:00,237 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:49:00,237 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:49:00,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-11-19 04:49:00,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-11-19 04:49:00,446 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:49:00,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:49:00,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1018615439, now seen corresponding path program 75 times [2021-11-19 04:49:00,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:49:00,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807260055] [2021-11-19 04:49:00,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:49:00,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:49:00,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:49:00,771 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 04:49:00,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:49:00,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807260055] [2021-11-19 04:49:00,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807260055] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:49:00,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288566923] [2021-11-19 04:49:00,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:49:00,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:49:00,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:49:00,772 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:49:00,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-11-19 04:49:00,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-19 04:49:00,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:49:00,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-19 04:49:00,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:49:01,434 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 04:49:01,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:49:01,717 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 04:49:01,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288566923] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:49:01,717 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:49:01,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 42 [2021-11-19 04:49:01,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663940179] [2021-11-19 04:49:01,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:49:01,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-19 04:49:01,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:49:01,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-19 04:49:01,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1606, Unknown=0, NotChecked=0, Total=1722 [2021-11-19 04:49:01,719 INFO L87 Difference]: Start difference. First operand 681 states and 758 transitions. Second operand has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 42 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:02,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:49:02,927 INFO L93 Difference]: Finished difference Result 774 states and 854 transitions. [2021-11-19 04:49:02,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-19 04:49:02,927 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 42 states have internal predecessors, (62), 0 states have call successors, (0), 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 42 [2021-11-19 04:49:02,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:49:02,930 INFO L225 Difference]: With dead ends: 774 [2021-11-19 04:49:02,931 INFO L226 Difference]: Without dead ends: 743 [2021-11-19 04:49:02,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 59 SyntacticMatches, 7 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=313, Invalid=3719, Unknown=0, NotChecked=0, Total=4032 [2021-11-19 04:49:02,932 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 121 mSDsluCounter, 913 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 953 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:49:02,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 953 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:49:02,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2021-11-19 04:49:03,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 677. [2021-11-19 04:49:03,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 676 states have (on average 1.1168639053254439) internal successors, (755), 676 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:03,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 755 transitions. [2021-11-19 04:49:03,216 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 755 transitions. Word has length 42 [2021-11-19 04:49:03,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:49:03,216 INFO L470 AbstractCegarLoop]: Abstraction has 677 states and 755 transitions. [2021-11-19 04:49:03,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 42 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:03,216 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 755 transitions. [2021-11-19 04:49:03,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-19 04:49:03,218 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:49:03,218 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:49:03,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-11-19 04:49:03,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:49:03,418 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:49:03,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:49:03,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1114544290, now seen corresponding path program 76 times [2021-11-19 04:49:03,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:49:03,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553445612] [2021-11-19 04:49:03,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:49:03,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:49:03,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:49:03,575 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-19 04:49:03,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:49:03,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553445612] [2021-11-19 04:49:03,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553445612] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:49:03,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614762154] [2021-11-19 04:49:03,576 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 04:49:03,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:49:03,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:49:03,577 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:49:03,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-11-19 04:49:03,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 04:49:03,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:49:03,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-19 04:49:03,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:49:03,991 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-19 04:49:03,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:49:04,272 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-19 04:49:04,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614762154] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:49:04,273 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:49:04,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 35 [2021-11-19 04:49:04,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137569505] [2021-11-19 04:49:04,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:49:04,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-19 04:49:04,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:49:04,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-19 04:49:04,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1088, Unknown=0, NotChecked=0, Total=1190 [2021-11-19 04:49:04,274 INFO L87 Difference]: Start difference. First operand 677 states and 755 transitions. Second operand has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:05,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:49:05,471 INFO L93 Difference]: Finished difference Result 755 states and 828 transitions. [2021-11-19 04:49:05,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-19 04:49:05,471 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 states have internal predecessors, (57), 0 states have call successors, (0), 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 42 [2021-11-19 04:49:05,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:49:05,473 INFO L225 Difference]: With dead ends: 755 [2021-11-19 04:49:05,473 INFO L226 Difference]: Without dead ends: 721 [2021-11-19 04:49:05,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=314, Invalid=2236, Unknown=0, NotChecked=0, Total=2550 [2021-11-19 04:49:05,474 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 826 mSDsluCounter, 1702 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 1792 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:49:05,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [826 Valid, 1792 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:49:05,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-11-19 04:49:05,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 677. [2021-11-19 04:49:05,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 676 states have (on average 1.1020710059171597) internal successors, (745), 676 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:05,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 745 transitions. [2021-11-19 04:49:05,754 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 745 transitions. Word has length 42 [2021-11-19 04:49:05,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:49:05,755 INFO L470 AbstractCegarLoop]: Abstraction has 677 states and 745 transitions. [2021-11-19 04:49:05,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:05,755 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 745 transitions. [2021-11-19 04:49:05,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-19 04:49:05,756 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:49:05,756 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:49:05,777 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-11-19 04:49:05,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:49:05,957 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:49:05,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:49:05,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1950289367, now seen corresponding path program 77 times [2021-11-19 04:49:05,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:49:05,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274239637] [2021-11-19 04:49:05,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:49:05,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:49:05,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:49:06,377 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:49:06,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:49:06,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274239637] [2021-11-19 04:49:06,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274239637] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:49:06,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153528101] [2021-11-19 04:49:06,378 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 04:49:06,378 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:49:06,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:49:06,379 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:49:06,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-11-19 04:49:06,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-19 04:49:06,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:49:06,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-19 04:49:06,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:49:07,407 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:49:07,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:49:08,016 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:49:08,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153528101] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:49:08,016 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:49:08,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 59 [2021-11-19 04:49:08,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334378229] [2021-11-19 04:49:08,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:49:08,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-19 04:49:08,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:49:08,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-19 04:49:08,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=3259, Unknown=0, NotChecked=0, Total=3422 [2021-11-19 04:49:08,017 INFO L87 Difference]: Start difference. First operand 677 states and 745 transitions. Second operand has 59 states, 59 states have (on average 1.5084745762711864) internal successors, (89), 59 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) [2021-11-19 04:49:15,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:49:15,057 INFO L93 Difference]: Finished difference Result 1173 states and 1259 transitions. [2021-11-19 04:49:15,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-11-19 04:49:15,058 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.5084745762711864) internal successors, (89), 59 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) Word has length 43 [2021-11-19 04:49:15,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:49:15,059 INFO L225 Difference]: With dead ends: 1173 [2021-11-19 04:49:15,059 INFO L226 Difference]: Without dead ends: 1125 [2021-11-19 04:49:15,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4437 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=4689, Invalid=18567, Unknown=0, NotChecked=0, Total=23256 [2021-11-19 04:49:15,060 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 2816 mSDsluCounter, 2164 mSDsCounter, 0 mSdLazyCounter, 1515 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2816 SdHoareTripleChecker+Valid, 2266 SdHoareTripleChecker+Invalid, 1665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 1515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:49:15,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2816 Valid, 2266 Invalid, 1665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 1515 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 04:49:15,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2021-11-19 04:49:15,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 743. [2021-11-19 04:49:15,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 1.101078167115903) internal successors, (817), 742 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:15,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 817 transitions. [2021-11-19 04:49:15,390 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 817 transitions. Word has length 43 [2021-11-19 04:49:15,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:49:15,390 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 817 transitions. [2021-11-19 04:49:15,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.5084745762711864) internal successors, (89), 59 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) [2021-11-19 04:49:15,390 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 817 transitions. [2021-11-19 04:49:15,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-19 04:49:15,392 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:49:15,392 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:49:15,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-11-19 04:49:15,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-11-19 04:49:15,606 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:49:15,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:49:15,607 INFO L85 PathProgramCache]: Analyzing trace with hash 345068246, now seen corresponding path program 78 times [2021-11-19 04:49:15,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:49:15,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267776364] [2021-11-19 04:49:15,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:49:15,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:49:15,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:49:15,958 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:49:15,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:49:15,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267776364] [2021-11-19 04:49:15,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267776364] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:49:15,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695901208] [2021-11-19 04:49:15,959 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 04:49:15,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:49:15,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:49:15,961 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:49:15,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-11-19 04:49:16,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-19 04:49:16,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:49:16,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-19 04:49:16,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:49:16,978 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:49:16,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:49:17,627 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:49:17,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695901208] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:49:17,627 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:49:17,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 60 [2021-11-19 04:49:17,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703776514] [2021-11-19 04:49:17,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:49:17,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-19 04:49:17,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:49:17,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-19 04:49:17,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=3363, Unknown=0, NotChecked=0, Total=3540 [2021-11-19 04:49:17,628 INFO L87 Difference]: Start difference. First operand 743 states and 817 transitions. Second operand has 60 states, 60 states have (on average 1.5) internal successors, (90), 60 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:21,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:49:21,133 INFO L93 Difference]: Finished difference Result 1155 states and 1235 transitions. [2021-11-19 04:49:21,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-19 04:49:21,133 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.5) internal successors, (90), 60 states have internal predecessors, (90), 0 states have call successors, (0), 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 [2021-11-19 04:49:21,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:49:21,134 INFO L225 Difference]: With dead ends: 1155 [2021-11-19 04:49:21,134 INFO L226 Difference]: Without dead ends: 1131 [2021-11-19 04:49:21,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1046 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=739, Invalid=7451, Unknown=0, NotChecked=0, Total=8190 [2021-11-19 04:49:21,135 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 2253 mSDsluCounter, 5784 mSDsCounter, 0 mSdLazyCounter, 2298 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2253 SdHoareTripleChecker+Valid, 5946 SdHoareTripleChecker+Invalid, 2399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 2298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 04:49:21,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2253 Valid, 5946 Invalid, 2399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 2298 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 04:49:21,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2021-11-19 04:49:21,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 749. [2021-11-19 04:49:21,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 1.1002673796791445) internal successors, (823), 748 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:21,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 823 transitions. [2021-11-19 04:49:21,454 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 823 transitions. Word has length 43 [2021-11-19 04:49:21,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:49:21,454 INFO L470 AbstractCegarLoop]: Abstraction has 749 states and 823 transitions. [2021-11-19 04:49:21,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.5) internal successors, (90), 60 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:21,454 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 823 transitions. [2021-11-19 04:49:21,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-19 04:49:21,455 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:49:21,455 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:49:21,479 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2021-11-19 04:49:21,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:49:21,662 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:49:21,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:49:21,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1718266860, now seen corresponding path program 79 times [2021-11-19 04:49:21,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:49:21,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024569356] [2021-11-19 04:49:21,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:49:21,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:49:21,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:49:21,767 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-19 04:49:21,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:49:21,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024569356] [2021-11-19 04:49:21,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024569356] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:49:21,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846712679] [2021-11-19 04:49:21,767 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 04:49:21,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:49:21,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:49:21,768 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:49:21,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-11-19 04:49:21,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:49:21,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 04:49:21,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:49:21,958 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-19 04:49:21,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:49:22,042 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-19 04:49:22,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846712679] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:49:22,042 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:49:22,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2021-11-19 04:49:22,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912297764] [2021-11-19 04:49:22,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:49:22,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-19 04:49:22,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:49:22,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-19 04:49:22,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-11-19 04:49:22,043 INFO L87 Difference]: Start difference. First operand 749 states and 823 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:22,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:49:22,642 INFO L93 Difference]: Finished difference Result 919 states and 1007 transitions. [2021-11-19 04:49:22,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-19 04:49:22,643 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 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 [2021-11-19 04:49:22,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:49:22,643 INFO L225 Difference]: With dead ends: 919 [2021-11-19 04:49:22,644 INFO L226 Difference]: Without dead ends: 779 [2021-11-19 04:49:22,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=487, Invalid=919, Unknown=0, NotChecked=0, Total=1406 [2021-11-19 04:49:22,644 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 173 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:49:22,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 382 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:49:22,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2021-11-19 04:49:22,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 735. [2021-11-19 04:49:22,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 734 states have (on average 1.0967302452316077) internal successors, (805), 734 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:22,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 805 transitions. [2021-11-19 04:49:22,971 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 805 transitions. Word has length 43 [2021-11-19 04:49:22,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:49:22,972 INFO L470 AbstractCegarLoop]: Abstraction has 735 states and 805 transitions. [2021-11-19 04:49:22,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:22,972 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 805 transitions. [2021-11-19 04:49:22,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-19 04:49:22,973 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:49:22,973 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:49:22,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-11-19 04:49:23,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:49:23,173 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:49:23,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:49:23,174 INFO L85 PathProgramCache]: Analyzing trace with hash -2059418347, now seen corresponding path program 80 times [2021-11-19 04:49:23,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:49:23,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346653269] [2021-11-19 04:49:23,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:49:23,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:49:23,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:49:23,265 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-19 04:49:23,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:49:23,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346653269] [2021-11-19 04:49:23,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346653269] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:49:23,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395412396] [2021-11-19 04:49:23,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:49:23,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:49:23,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:49:23,267 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:49:23,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-11-19 04:49:23,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:49:23,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:49:23,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 04:49:23,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:49:23,457 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-19 04:49:23,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:49:23,534 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-19 04:49:23,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395412396] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:49:23,538 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:49:23,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2021-11-19 04:49:23,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135352237] [2021-11-19 04:49:23,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:49:23,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-19 04:49:23,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:49:23,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-19 04:49:23,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-11-19 04:49:23,540 INFO L87 Difference]: Start difference. First operand 735 states and 805 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:24,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:49:24,181 INFO L93 Difference]: Finished difference Result 786 states and 851 transitions. [2021-11-19 04:49:24,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-19 04:49:24,181 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 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 [2021-11-19 04:49:24,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:49:24,182 INFO L225 Difference]: With dead ends: 786 [2021-11-19 04:49:24,182 INFO L226 Difference]: Without dead ends: 780 [2021-11-19 04:49:24,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=487, Invalid=919, Unknown=0, NotChecked=0, Total=1406 [2021-11-19 04:49:24,183 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 80 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:49:24,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 386 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:49:24,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2021-11-19 04:49:24,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 736. [2021-11-19 04:49:24,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 1.0965986394557823) internal successors, (806), 735 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:24,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 806 transitions. [2021-11-19 04:49:24,509 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 806 transitions. Word has length 43 [2021-11-19 04:49:24,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:49:24,510 INFO L470 AbstractCegarLoop]: Abstraction has 736 states and 806 transitions. [2021-11-19 04:49:24,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:24,510 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 806 transitions. [2021-11-19 04:49:24,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-19 04:49:24,511 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:49:24,511 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:49:24,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-11-19 04:49:24,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-11-19 04:49:24,711 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:49:24,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:49:24,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1525148816, now seen corresponding path program 81 times [2021-11-19 04:49:24,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:49:24,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311457425] [2021-11-19 04:49:24,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:49:24,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:49:24,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:49:25,297 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:49:25,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:49:25,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311457425] [2021-11-19 04:49:25,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311457425] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:49:25,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996174273] [2021-11-19 04:49:25,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:49:25,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:49:25,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:49:25,299 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:49:25,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-11-19 04:49:25,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-19 04:49:25,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:49:25,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-19 04:49:25,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:49:26,066 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:49:26,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:49:26,434 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:49:26,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996174273] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:49:26,435 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:49:26,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 53 [2021-11-19 04:49:26,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374052166] [2021-11-19 04:49:26,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:49:26,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-19 04:49:26,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:49:26,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-19 04:49:26,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=2629, Unknown=0, NotChecked=0, Total=2756 [2021-11-19 04:49:26,436 INFO L87 Difference]: Start difference. First operand 736 states and 806 transitions. Second operand has 53 states, 53 states have (on average 1.3584905660377358) internal successors, (72), 53 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:29,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:49:29,309 INFO L93 Difference]: Finished difference Result 1317 states and 1400 transitions. [2021-11-19 04:49:29,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-19 04:49:29,310 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.3584905660377358) internal successors, (72), 53 states have internal predecessors, (72), 0 states have call successors, (0), 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 [2021-11-19 04:49:29,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:49:29,311 INFO L225 Difference]: With dead ends: 1317 [2021-11-19 04:49:29,311 INFO L226 Difference]: Without dead ends: 1308 [2021-11-19 04:49:29,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1311 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=378, Invalid=6932, Unknown=0, NotChecked=0, Total=7310 [2021-11-19 04:49:29,312 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 322 mSDsluCounter, 6069 mSDsCounter, 0 mSdLazyCounter, 2727 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 6254 SdHoareTripleChecker+Invalid, 2779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 2727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:49:29,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 6254 Invalid, 2779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 2727 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 04:49:29,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-11-19 04:49:29,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 745. [2021-11-19 04:49:29,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 744 states have (on average 1.096774193548387) internal successors, (816), 744 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:29,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 816 transitions. [2021-11-19 04:49:29,634 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 816 transitions. Word has length 44 [2021-11-19 04:49:29,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:49:29,635 INFO L470 AbstractCegarLoop]: Abstraction has 745 states and 816 transitions. [2021-11-19 04:49:29,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.3584905660377358) internal successors, (72), 53 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:29,635 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 816 transitions. [2021-11-19 04:49:29,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-19 04:49:29,637 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:49:29,637 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:49:29,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-11-19 04:49:29,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:49:29,850 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:49:29,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:49:29,850 INFO L85 PathProgramCache]: Analyzing trace with hash 39040176, now seen corresponding path program 82 times [2021-11-19 04:49:29,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:49:29,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894773793] [2021-11-19 04:49:29,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:49:29,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:49:29,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:49:30,355 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:49:30,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:49:30,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894773793] [2021-11-19 04:49:30,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894773793] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:49:30,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748320183] [2021-11-19 04:49:30,355 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 04:49:30,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:49:30,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:49:30,357 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:49:30,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-11-19 04:49:30,401 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 04:49:30,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:49:30,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-19 04:49:30,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:49:31,110 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:49:31,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:49:31,445 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:49:31,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748320183] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:49:31,445 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:49:31,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 51 [2021-11-19 04:49:31,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599314853] [2021-11-19 04:49:31,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:49:31,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-19 04:49:31,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:49:31,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-19 04:49:31,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=2424, Unknown=0, NotChecked=0, Total=2550 [2021-11-19 04:49:31,446 INFO L87 Difference]: Start difference. First operand 745 states and 816 transitions. Second operand has 51 states, 51 states have (on average 1.392156862745098) internal successors, (71), 51 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) [2021-11-19 04:49:33,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:49:33,867 INFO L93 Difference]: Finished difference Result 1118 states and 1188 transitions. [2021-11-19 04:49:33,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-19 04:49:33,868 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.392156862745098) internal successors, (71), 51 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) Word has length 44 [2021-11-19 04:49:33,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:49:33,869 INFO L225 Difference]: With dead ends: 1118 [2021-11-19 04:49:33,869 INFO L226 Difference]: Without dead ends: 1089 [2021-11-19 04:49:33,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 62 SyntacticMatches, 7 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1164 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=349, Invalid=6131, Unknown=0, NotChecked=0, Total=6480 [2021-11-19 04:49:33,870 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 240 mSDsluCounter, 5000 mSDsCounter, 0 mSdLazyCounter, 2378 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 5157 SdHoareTripleChecker+Invalid, 2426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 2378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 04:49:33,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 5157 Invalid, 2426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 2378 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 04:49:33,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-11-19 04:49:34,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 736. [2021-11-19 04:49:34,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 1.0965986394557823) internal successors, (806), 735 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:34,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 806 transitions. [2021-11-19 04:49:34,190 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 806 transitions. Word has length 44 [2021-11-19 04:49:34,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:49:34,190 INFO L470 AbstractCegarLoop]: Abstraction has 736 states and 806 transitions. [2021-11-19 04:49:34,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.392156862745098) internal successors, (71), 51 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) [2021-11-19 04:49:34,190 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 806 transitions. [2021-11-19 04:49:34,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-19 04:49:34,191 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:49:34,191 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:49:34,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-11-19 04:49:34,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:49:34,392 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:49:34,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:49:34,392 INFO L85 PathProgramCache]: Analyzing trace with hash 888591216, now seen corresponding path program 83 times [2021-11-19 04:49:34,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:49:34,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587212784] [2021-11-19 04:49:34,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:49:34,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:49:34,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:49:34,883 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 04:49:34,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:49:34,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587212784] [2021-11-19 04:49:34,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587212784] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:49:34,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900604646] [2021-11-19 04:49:34,883 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 04:49:34,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:49:34,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:49:34,884 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:49:34,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-11-19 04:49:34,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-19 04:49:34,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:49:34,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-19 04:49:34,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:49:35,614 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 04:49:35,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:49:35,946 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 04:49:35,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900604646] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:49:35,946 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:49:35,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 49 [2021-11-19 04:49:35,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736183905] [2021-11-19 04:49:35,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:49:35,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-19 04:49:35,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:49:35,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-19 04:49:35,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2227, Unknown=0, NotChecked=0, Total=2352 [2021-11-19 04:49:35,947 INFO L87 Difference]: Start difference. First operand 736 states and 806 transitions. Second operand has 49 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:38,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:49:38,004 INFO L93 Difference]: Finished difference Result 977 states and 1046 transitions. [2021-11-19 04:49:38,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-19 04:49:38,004 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 0 states have call successors, (0), 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 [2021-11-19 04:49:38,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:49:38,005 INFO L225 Difference]: With dead ends: 977 [2021-11-19 04:49:38,005 INFO L226 Difference]: Without dead ends: 947 [2021-11-19 04:49:38,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 62 SyntacticMatches, 7 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=343, Invalid=5509, Unknown=0, NotChecked=0, Total=5852 [2021-11-19 04:49:38,006 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 198 mSDsluCounter, 3600 mSDsCounter, 0 mSdLazyCounter, 1882 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 3723 SdHoareTripleChecker+Invalid, 1933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:49:38,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 3723 Invalid, 1933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1882 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 04:49:38,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2021-11-19 04:49:38,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 725. [2021-11-19 04:49:38,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 724 states have (on average 1.0966850828729282) internal successors, (794), 724 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:38,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 794 transitions. [2021-11-19 04:49:38,316 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 794 transitions. Word has length 44 [2021-11-19 04:49:38,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:49:38,316 INFO L470 AbstractCegarLoop]: Abstraction has 725 states and 794 transitions. [2021-11-19 04:49:38,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:38,316 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 794 transitions. [2021-11-19 04:49:38,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-19 04:49:38,317 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:49:38,317 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:49:38,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-11-19 04:49:38,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:49:38,518 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:49:38,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:49:38,519 INFO L85 PathProgramCache]: Analyzing trace with hash -359009104, now seen corresponding path program 84 times [2021-11-19 04:49:38,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:49:38,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611143952] [2021-11-19 04:49:38,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:49:38,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:49:38,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:49:38,930 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 04:49:38,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:49:38,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611143952] [2021-11-19 04:49:38,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611143952] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:49:38,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184404681] [2021-11-19 04:49:38,931 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 04:49:38,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:49:38,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:49:38,932 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:49:38,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-11-19 04:49:38,977 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-19 04:49:38,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:49:38,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-19 04:49:38,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:49:39,645 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 04:49:39,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:49:39,959 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 04:49:39,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184404681] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:49:39,959 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:49:39,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 47 [2021-11-19 04:49:39,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806184984] [2021-11-19 04:49:39,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:49:39,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-19 04:49:39,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:49:39,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-19 04:49:39,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=2038, Unknown=0, NotChecked=0, Total=2162 [2021-11-19 04:49:39,960 INFO L87 Difference]: Start difference. First operand 725 states and 794 transitions. Second operand has 47 states, 47 states have (on average 1.425531914893617) internal successors, (67), 47 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:41,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:49:41,616 INFO L93 Difference]: Finished difference Result 869 states and 937 transitions. [2021-11-19 04:49:41,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-19 04:49:41,616 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.425531914893617) internal successors, (67), 47 states have internal predecessors, (67), 0 states have call successors, (0), 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 [2021-11-19 04:49:41,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:49:41,617 INFO L225 Difference]: With dead ends: 869 [2021-11-19 04:49:41,617 INFO L226 Difference]: Without dead ends: 838 [2021-11-19 04:49:41,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 62 SyntacticMatches, 7 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=337, Invalid=4919, Unknown=0, NotChecked=0, Total=5256 [2021-11-19 04:49:41,618 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 154 mSDsluCounter, 2243 mSDsCounter, 0 mSdLazyCounter, 1317 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 2332 SdHoareTripleChecker+Invalid, 1364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:49:41,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 2332 Invalid, 1364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1317 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 04:49:41,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2021-11-19 04:49:41,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 712. [2021-11-19 04:49:41,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 711 states have (on average 1.0970464135021096) internal successors, (780), 711 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:41,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 780 transitions. [2021-11-19 04:49:41,957 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 780 transitions. Word has length 44 [2021-11-19 04:49:41,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:49:41,957 INFO L470 AbstractCegarLoop]: Abstraction has 712 states and 780 transitions. [2021-11-19 04:49:41,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.425531914893617) internal successors, (67), 47 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:41,958 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 780 transitions. [2021-11-19 04:49:41,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-19 04:49:41,958 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:49:41,959 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:49:41,979 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2021-11-19 04:49:42,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:49:42,159 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:49:42,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:49:42,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1685351568, now seen corresponding path program 85 times [2021-11-19 04:49:42,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:49:42,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745341444] [2021-11-19 04:49:42,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:49:42,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:49:42,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:49:42,560 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 04:49:42,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:49:42,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745341444] [2021-11-19 04:49:42,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745341444] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:49:42,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015529573] [2021-11-19 04:49:42,561 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 04:49:42,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:49:42,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:49:42,561 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:49:42,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-11-19 04:49:42,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:49:42,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-19 04:49:42,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:49:43,262 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 04:49:43,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:49:43,564 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 04:49:43,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015529573] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:49:43,564 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:49:43,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 45 [2021-11-19 04:49:43,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185448685] [2021-11-19 04:49:43,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:49:43,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-19 04:49:43,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:49:43,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-19 04:49:43,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1857, Unknown=0, NotChecked=0, Total=1980 [2021-11-19 04:49:43,565 INFO L87 Difference]: Start difference. First operand 712 states and 780 transitions. Second operand has 45 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 45 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:44,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:49:44,877 INFO L93 Difference]: Finished difference Result 780 states and 847 transitions. [2021-11-19 04:49:44,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-19 04:49:44,877 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 45 states have internal predecessors, (65), 0 states have call successors, (0), 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 [2021-11-19 04:49:44,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:49:44,878 INFO L225 Difference]: With dead ends: 780 [2021-11-19 04:49:44,878 INFO L226 Difference]: Without dead ends: 748 [2021-11-19 04:49:44,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 62 SyntacticMatches, 7 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=331, Invalid=4361, Unknown=0, NotChecked=0, Total=4692 [2021-11-19 04:49:44,879 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 116 mSDsluCounter, 1308 mSDsCounter, 0 mSdLazyCounter, 974 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 1363 SdHoareTripleChecker+Invalid, 1023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:49:44,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 1363 Invalid, 1023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 974 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:49:44,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-11-19 04:49:45,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 697. [2021-11-19 04:49:45,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 1.0977011494252873) internal successors, (764), 696 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:45,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 764 transitions. [2021-11-19 04:49:45,172 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 764 transitions. Word has length 44 [2021-11-19 04:49:45,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:49:45,173 INFO L470 AbstractCegarLoop]: Abstraction has 697 states and 764 transitions. [2021-11-19 04:49:45,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 45 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:45,173 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 764 transitions. [2021-11-19 04:49:45,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-19 04:49:45,174 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:49:45,175 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:49:45,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-11-19 04:49:45,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:49:45,394 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:49:45,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:49:45,394 INFO L85 PathProgramCache]: Analyzing trace with hash -2111163216, now seen corresponding path program 86 times [2021-11-19 04:49:45,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:49:45,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541497113] [2021-11-19 04:49:45,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:49:45,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:49:45,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:49:45,740 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 04:49:45,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:49:45,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541497113] [2021-11-19 04:49:45,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541497113] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:49:45,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006673989] [2021-11-19 04:49:45,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:49:45,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:49:45,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:49:45,742 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:49:45,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-11-19 04:49:45,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:49:45,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:49:45,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-19 04:49:45,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:49:46,432 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 04:49:46,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:49:46,722 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 04:49:46,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006673989] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:49:46,722 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:49:46,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 43 [2021-11-19 04:49:46,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42767306] [2021-11-19 04:49:46,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:49:46,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-19 04:49:46,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:49:46,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-19 04:49:46,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2021-11-19 04:49:46,723 INFO L87 Difference]: Start difference. First operand 697 states and 764 transitions. Second operand has 43 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 43 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:47,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:49:47,796 INFO L93 Difference]: Finished difference Result 746 states and 815 transitions. [2021-11-19 04:49:47,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-19 04:49:47,797 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 43 states have internal predecessors, (63), 0 states have call successors, (0), 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 [2021-11-19 04:49:47,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:49:47,798 INFO L225 Difference]: With dead ends: 746 [2021-11-19 04:49:47,798 INFO L226 Difference]: Without dead ends: 740 [2021-11-19 04:49:47,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 62 SyntacticMatches, 7 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=325, Invalid=3835, Unknown=0, NotChecked=0, Total=4160 [2021-11-19 04:49:47,799 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 95 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:49:47,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 597 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:49:47,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2021-11-19 04:49:48,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 711. [2021-11-19 04:49:48,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 710 states have (on average 1.0985915492957747) internal successors, (780), 710 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:48,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 780 transitions. [2021-11-19 04:49:48,103 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 780 transitions. Word has length 44 [2021-11-19 04:49:48,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:49:48,103 INFO L470 AbstractCegarLoop]: Abstraction has 711 states and 780 transitions. [2021-11-19 04:49:48,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 43 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:48,103 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 780 transitions. [2021-11-19 04:49:48,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-19 04:49:48,104 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:49:48,104 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:49:48,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2021-11-19 04:49:48,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-11-19 04:49:48,305 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:49:48,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:49:48,305 INFO L85 PathProgramCache]: Analyzing trace with hash 627664406, now seen corresponding path program 87 times [2021-11-19 04:49:48,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:49:48,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093375608] [2021-11-19 04:49:48,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:49:48,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:49:48,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:49:48,678 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:49:48,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:49:48,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093375608] [2021-11-19 04:49:48,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093375608] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:49:48,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67030115] [2021-11-19 04:49:48,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:49:48,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:49:48,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:49:48,679 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:49:48,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-11-19 04:49:48,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-19 04:49:48,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:49:48,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-19 04:49:48,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:49:49,790 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:49:49,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:49:50,496 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:49:50,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67030115] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:49:50,496 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:49:50,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 64 [2021-11-19 04:49:50,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232388289] [2021-11-19 04:49:50,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:49:50,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-19 04:49:50,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:49:50,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-19 04:49:50,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=3855, Unknown=0, NotChecked=0, Total=4032 [2021-11-19 04:49:50,498 INFO L87 Difference]: Start difference. First operand 711 states and 780 transitions. Second operand has 64 states, 64 states have (on average 1.46875) internal successors, (94), 64 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:59,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:49:59,536 INFO L93 Difference]: Finished difference Result 1257 states and 1344 transitions. [2021-11-19 04:49:59,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-11-19 04:49:59,536 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.46875) internal successors, (94), 64 states have internal predecessors, (94), 0 states have call successors, (0), 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 45 [2021-11-19 04:49:59,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:49:59,537 INFO L225 Difference]: With dead ends: 1257 [2021-11-19 04:49:59,537 INFO L226 Difference]: Without dead ends: 1207 [2021-11-19 04:49:59,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5901 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=5965, Invalid=23791, Unknown=0, NotChecked=0, Total=29756 [2021-11-19 04:49:59,539 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 4005 mSDsluCounter, 2647 mSDsCounter, 0 mSdLazyCounter, 1928 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4005 SdHoareTripleChecker+Valid, 2757 SdHoareTripleChecker+Invalid, 2124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 1928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 04:49:59,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4005 Valid, 2757 Invalid, 2124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 1928 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 04:49:59,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2021-11-19 04:49:59,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 778. [2021-11-19 04:49:59,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 777 states have (on average 1.0978120978120978) internal successors, (853), 777 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:59,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 853 transitions. [2021-11-19 04:49:59,899 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 853 transitions. Word has length 45 [2021-11-19 04:49:59,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:49:59,899 INFO L470 AbstractCegarLoop]: Abstraction has 778 states and 853 transitions. [2021-11-19 04:49:59,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.46875) internal successors, (94), 64 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:59,899 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 853 transitions. [2021-11-19 04:49:59,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-19 04:49:59,900 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:49:59,900 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:49:59,921 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2021-11-19 04:50:00,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:50:00,101 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:50:00,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:50:00,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1889550089, now seen corresponding path program 88 times [2021-11-19 04:50:00,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:50:00,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833890127] [2021-11-19 04:50:00,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:50:00,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:50:00,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:50:00,582 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:50:00,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:50:00,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833890127] [2021-11-19 04:50:00,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833890127] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:50:00,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32986406] [2021-11-19 04:50:00,583 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 04:50:00,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:50:00,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:50:00,583 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:50:00,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-11-19 04:50:00,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 04:50:00,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:50:00,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-19 04:50:00,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:50:01,748 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:50:01,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:50:02,531 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:50:02,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32986406] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:50:02,532 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:50:02,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 65 [2021-11-19 04:50:02,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869115369] [2021-11-19 04:50:02,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:50:02,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-19 04:50:02,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:50:02,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-19 04:50:02,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=3968, Unknown=0, NotChecked=0, Total=4160 [2021-11-19 04:50:02,533 INFO L87 Difference]: Start difference. First operand 778 states and 853 transitions. Second operand has 65 states, 65 states have (on average 1.4615384615384615) internal successors, (95), 65 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:06,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:50:06,885 INFO L93 Difference]: Finished difference Result 1238 states and 1319 transitions. [2021-11-19 04:50:06,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-19 04:50:06,886 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.4615384615384615) internal successors, (95), 65 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-19 04:50:06,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:50:06,887 INFO L225 Difference]: With dead ends: 1238 [2021-11-19 04:50:06,887 INFO L226 Difference]: Without dead ends: 1213 [2021-11-19 04:50:06,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1248 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=842, Invalid=8860, Unknown=0, NotChecked=0, Total=9702 [2021-11-19 04:50:06,888 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 2761 mSDsluCounter, 7026 mSDsCounter, 0 mSdLazyCounter, 2656 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2761 SdHoareTripleChecker+Valid, 7204 SdHoareTripleChecker+Invalid, 2786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 2656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:50:06,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2761 Valid, 7204 Invalid, 2786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 2656 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 04:50:06,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2021-11-19 04:50:07,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 784. [2021-11-19 04:50:07,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 1.0970625798212006) internal successors, (859), 783 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:07,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 859 transitions. [2021-11-19 04:50:07,255 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 859 transitions. Word has length 45 [2021-11-19 04:50:07,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:50:07,256 INFO L470 AbstractCegarLoop]: Abstraction has 784 states and 859 transitions. [2021-11-19 04:50:07,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.4615384615384615) internal successors, (95), 65 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:07,256 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 859 transitions. [2021-11-19 04:50:07,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-19 04:50:07,257 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:50:07,257 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:50:07,278 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2021-11-19 04:50:07,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:50:07,458 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:50:07,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:50:07,458 INFO L85 PathProgramCache]: Analyzing trace with hash 579713141, now seen corresponding path program 89 times [2021-11-19 04:50:07,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:50:07,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202247101] [2021-11-19 04:50:07,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:50:07,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:50:07,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:50:07,565 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-19 04:50:07,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:50:07,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202247101] [2021-11-19 04:50:07,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202247101] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:50:07,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058241714] [2021-11-19 04:50:07,565 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 04:50:07,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:50:07,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:50:07,566 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:50:07,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-11-19 04:50:07,619 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-19 04:50:07,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:50:07,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 04:50:07,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:50:07,805 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-19 04:50:07,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:50:07,883 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-19 04:50:07,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058241714] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:50:07,884 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:50:07,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 25 [2021-11-19 04:50:07,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663803020] [2021-11-19 04:50:07,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:50:07,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-19 04:50:07,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:50:07,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-19 04:50:07,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2021-11-19 04:50:07,885 INFO L87 Difference]: Start difference. First operand 784 states and 859 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:08,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:50:08,776 INFO L93 Difference]: Finished difference Result 897 states and 981 transitions. [2021-11-19 04:50:08,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-19 04:50:08,777 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 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 45 [2021-11-19 04:50:08,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:50:08,779 INFO L225 Difference]: With dead ends: 897 [2021-11-19 04:50:08,780 INFO L226 Difference]: Without dead ends: 880 [2021-11-19 04:50:08,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=495, Invalid=1485, Unknown=0, NotChecked=0, Total=1980 [2021-11-19 04:50:08,781 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 235 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:50:08,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 385 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:50:08,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2021-11-19 04:50:09,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 824. [2021-11-19 04:50:09,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 823 states have (on average 1.1081409477521265) internal successors, (912), 823 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:09,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 912 transitions. [2021-11-19 04:50:09,189 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 912 transitions. Word has length 45 [2021-11-19 04:50:09,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:50:09,189 INFO L470 AbstractCegarLoop]: Abstraction has 824 states and 912 transitions. [2021-11-19 04:50:09,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:09,189 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 912 transitions. [2021-11-19 04:50:09,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-19 04:50:09,191 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:50:09,191 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:50:09,212 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2021-11-19 04:50:09,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-11-19 04:50:09,394 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:50:09,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:50:09,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1406048364, now seen corresponding path program 90 times [2021-11-19 04:50:09,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:50:09,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075638777] [2021-11-19 04:50:09,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:50:09,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:50:09,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:50:09,498 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-19 04:50:09,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:50:09,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075638777] [2021-11-19 04:50:09,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075638777] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:50:09,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832132932] [2021-11-19 04:50:09,499 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 04:50:09,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:50:09,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:50:09,500 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:50:09,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-11-19 04:50:09,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-19 04:50:09,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:50:09,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 04:50:09,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:50:09,715 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-19 04:50:09,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:50:09,793 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-19 04:50:09,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832132932] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:50:09,793 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:50:09,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 25 [2021-11-19 04:50:09,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691411126] [2021-11-19 04:50:09,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:50:09,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-19 04:50:09,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:50:09,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-19 04:50:09,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2021-11-19 04:50:09,794 INFO L87 Difference]: Start difference. First operand 824 states and 912 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:10,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:50:10,964 INFO L93 Difference]: Finished difference Result 1384 states and 1555 transitions. [2021-11-19 04:50:10,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-19 04:50:10,965 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 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 45 [2021-11-19 04:50:10,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:50:10,966 INFO L225 Difference]: With dead ends: 1384 [2021-11-19 04:50:10,966 INFO L226 Difference]: Without dead ends: 1180 [2021-11-19 04:50:10,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=495, Invalid=1485, Unknown=0, NotChecked=0, Total=1980 [2021-11-19 04:50:10,967 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 503 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:50:10,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [503 Valid, 595 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:50:10,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2021-11-19 04:50:11,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 934. [2021-11-19 04:50:11,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 1.1093247588424437) internal successors, (1035), 933 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:11,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1035 transitions. [2021-11-19 04:50:11,454 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1035 transitions. Word has length 45 [2021-11-19 04:50:11,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:50:11,454 INFO L470 AbstractCegarLoop]: Abstraction has 934 states and 1035 transitions. [2021-11-19 04:50:11,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:11,454 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1035 transitions. [2021-11-19 04:50:11,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-19 04:50:11,455 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:50:11,455 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:50:11,478 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2021-11-19 04:50:11,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-11-19 04:50:11,656 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:50:11,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:50:11,656 INFO L85 PathProgramCache]: Analyzing trace with hash -2078840465, now seen corresponding path program 91 times [2021-11-19 04:50:11,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:50:11,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087654957] [2021-11-19 04:50:11,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:50:11,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:50:11,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:50:12,304 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:50:12,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:50:12,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087654957] [2021-11-19 04:50:12,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087654957] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:50:12,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25890022] [2021-11-19 04:50:12,304 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 04:50:12,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:50:12,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:50:12,305 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:50:12,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-11-19 04:50:12,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:50:12,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-19 04:50:12,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:50:13,157 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:50:13,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:50:13,511 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:50:13,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25890022] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:50:13,511 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:50:13,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 56 [2021-11-19 04:50:13,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712302568] [2021-11-19 04:50:13,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:50:13,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-19 04:50:13,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:50:13,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-19 04:50:13,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2946, Unknown=0, NotChecked=0, Total=3080 [2021-11-19 04:50:13,513 INFO L87 Difference]: Start difference. First operand 934 states and 1035 transitions. Second operand has 56 states, 56 states have (on average 1.3392857142857142) internal successors, (75), 56 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:17,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:50:17,530 INFO L93 Difference]: Finished difference Result 1692 states and 1809 transitions. [2021-11-19 04:50:17,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-19 04:50:17,530 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.3392857142857142) internal successors, (75), 56 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-19 04:50:17,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:50:17,532 INFO L225 Difference]: With dead ends: 1692 [2021-11-19 04:50:17,532 INFO L226 Difference]: Without dead ends: 1683 [2021-11-19 04:50:17,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1471 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=397, Invalid=7793, Unknown=0, NotChecked=0, Total=8190 [2021-11-19 04:50:17,533 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 348 mSDsluCounter, 7335 mSDsCounter, 0 mSdLazyCounter, 3250 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 7537 SdHoareTripleChecker+Invalid, 3305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 3250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:50:17,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 7537 Invalid, 3305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 3250 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 04:50:17,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1683 states. [2021-11-19 04:50:17,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1683 to 943. [2021-11-19 04:50:17,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 943 states, 942 states have (on average 1.1093418259023355) internal successors, (1045), 942 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:17,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 1045 transitions. [2021-11-19 04:50:17,999 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 1045 transitions. Word has length 46 [2021-11-19 04:50:17,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:50:17,999 INFO L470 AbstractCegarLoop]: Abstraction has 943 states and 1045 transitions. [2021-11-19 04:50:17,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.3392857142857142) internal successors, (75), 56 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:17,999 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 1045 transitions. [2021-11-19 04:50:18,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-19 04:50:18,000 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:50:18,000 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:50:18,021 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2021-11-19 04:50:18,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-11-19 04:50:18,201 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:50:18,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:50:18,201 INFO L85 PathProgramCache]: Analyzing trace with hash 2111321103, now seen corresponding path program 92 times [2021-11-19 04:50:18,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:50:18,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769980135] [2021-11-19 04:50:18,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:50:18,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:50:18,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:50:18,802 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:50:18,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:50:18,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769980135] [2021-11-19 04:50:18,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769980135] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:50:18,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448282875] [2021-11-19 04:50:18,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:50:18,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:50:18,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:50:18,804 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:50:18,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-11-19 04:50:18,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:50:18,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:50:18,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-19 04:50:18,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:50:19,630 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:50:19,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:50:20,022 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:50:20,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448282875] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:50:20,022 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:50:20,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 54 [2021-11-19 04:50:20,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325659129] [2021-11-19 04:50:20,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:50:20,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-19 04:50:20,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:50:20,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-19 04:50:20,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2729, Unknown=0, NotChecked=0, Total=2862 [2021-11-19 04:50:20,023 INFO L87 Difference]: Start difference. First operand 943 states and 1045 transitions. Second operand has 54 states, 54 states have (on average 1.3703703703703705) internal successors, (74), 54 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:23,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:50:23,130 INFO L93 Difference]: Finished difference Result 1460 states and 1561 transitions. [2021-11-19 04:50:23,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-19 04:50:23,130 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.3703703703703705) internal successors, (74), 54 states have internal predecessors, (74), 0 states have call successors, (0), 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 46 [2021-11-19 04:50:23,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:50:23,132 INFO L225 Difference]: With dead ends: 1460 [2021-11-19 04:50:23,132 INFO L226 Difference]: Without dead ends: 1430 [2021-11-19 04:50:23,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 65 SyntacticMatches, 7 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1315 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=367, Invalid=6943, Unknown=0, NotChecked=0, Total=7310 [2021-11-19 04:50:23,133 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 262 mSDsluCounter, 5726 mSDsCounter, 0 mSdLazyCounter, 2615 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 5896 SdHoareTripleChecker+Invalid, 2668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 2615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:50:23,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 5896 Invalid, 2668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 2615 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 04:50:23,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1430 states. [2021-11-19 04:50:23,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1430 to 934. [2021-11-19 04:50:23,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 1.1093247588424437) internal successors, (1035), 933 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:23,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1035 transitions. [2021-11-19 04:50:23,594 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1035 transitions. Word has length 46 [2021-11-19 04:50:23,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:50:23,594 INFO L470 AbstractCegarLoop]: Abstraction has 934 states and 1035 transitions. [2021-11-19 04:50:23,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.3703703703703705) internal successors, (74), 54 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:23,594 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1035 transitions. [2021-11-19 04:50:23,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-19 04:50:23,595 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:50:23,595 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:50:23,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-11-19 04:50:23,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-11-19 04:50:23,796 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:50:23,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:50:23,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1796342545, now seen corresponding path program 93 times [2021-11-19 04:50:23,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:50:23,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508557184] [2021-11-19 04:50:23,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:50:23,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:50:23,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:50:24,324 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 04:50:24,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:50:24,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508557184] [2021-11-19 04:50:24,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508557184] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:50:24,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822700539] [2021-11-19 04:50:24,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:50:24,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:50:24,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:50:24,326 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:50:24,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-11-19 04:50:24,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-19 04:50:24,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:50:24,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-19 04:50:24,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:50:25,140 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 04:50:25,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:50:25,486 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 04:50:25,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822700539] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:50:25,487 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:50:25,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 52 [2021-11-19 04:50:25,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141406357] [2021-11-19 04:50:25,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:50:25,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-19 04:50:25,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:50:25,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-19 04:50:25,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=2520, Unknown=0, NotChecked=0, Total=2652 [2021-11-19 04:50:25,488 INFO L87 Difference]: Start difference. First operand 934 states and 1035 transitions. Second operand has 52 states, 52 states have (on average 1.3846153846153846) internal successors, (72), 52 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:28,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:50:28,295 INFO L93 Difference]: Finished difference Result 1285 states and 1385 transitions. [2021-11-19 04:50:28,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-19 04:50:28,295 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.3846153846153846) internal successors, (72), 52 states have internal predecessors, (72), 0 states have call successors, (0), 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 46 [2021-11-19 04:50:28,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:50:28,297 INFO L225 Difference]: With dead ends: 1285 [2021-11-19 04:50:28,297 INFO L226 Difference]: Without dead ends: 1254 [2021-11-19 04:50:28,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 65 SyntacticMatches, 7 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=361, Invalid=6281, Unknown=0, NotChecked=0, Total=6642 [2021-11-19 04:50:28,298 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 215 mSDsluCounter, 4839 mSDsCounter, 0 mSdLazyCounter, 2498 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 4975 SdHoareTripleChecker+Invalid, 2549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 2498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 04:50:28,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 4975 Invalid, 2549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 2498 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 04:50:28,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1254 states. [2021-11-19 04:50:28,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1254 to 923. [2021-11-19 04:50:28,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 922 states have (on average 1.1095444685466378) internal successors, (1023), 922 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:28,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1023 transitions. [2021-11-19 04:50:28,813 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1023 transitions. Word has length 46 [2021-11-19 04:50:28,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:50:28,813 INFO L470 AbstractCegarLoop]: Abstraction has 923 states and 1023 transitions. [2021-11-19 04:50:28,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.3846153846153846) internal successors, (72), 52 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:28,813 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1023 transitions. [2021-11-19 04:50:28,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-19 04:50:28,814 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:50:28,814 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:50:28,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-11-19 04:50:29,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:50:29,015 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:50:29,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:50:29,015 INFO L85 PathProgramCache]: Analyzing trace with hash -479321969, now seen corresponding path program 94 times [2021-11-19 04:50:29,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:50:29,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507062244] [2021-11-19 04:50:29,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:50:29,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:50:29,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:50:29,495 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 04:50:29,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:50:29,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507062244] [2021-11-19 04:50:29,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507062244] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:50:29,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338641007] [2021-11-19 04:50:29,496 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 04:50:29,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:50:29,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:50:29,498 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:50:29,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-11-19 04:50:29,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 04:50:29,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:50:29,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-19 04:50:29,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:50:30,287 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 04:50:30,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:50:30,622 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 04:50:30,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338641007] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:50:30,622 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:50:30,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 50 [2021-11-19 04:50:30,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978567176] [2021-11-19 04:50:30,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:50:30,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-19 04:50:30,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:50:30,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-19 04:50:30,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=2319, Unknown=0, NotChecked=0, Total=2450 [2021-11-19 04:50:30,623 INFO L87 Difference]: Start difference. First operand 923 states and 1023 transitions. Second operand has 50 states, 50 states have (on average 1.4) internal successors, (70), 50 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:33,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:50:33,117 INFO L93 Difference]: Finished difference Result 1149 states and 1248 transitions. [2021-11-19 04:50:33,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-19 04:50:33,118 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.4) internal successors, (70), 50 states have internal predecessors, (70), 0 states have call successors, (0), 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 46 [2021-11-19 04:50:33,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:50:33,119 INFO L225 Difference]: With dead ends: 1149 [2021-11-19 04:50:33,119 INFO L226 Difference]: Without dead ends: 1117 [2021-11-19 04:50:33,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 65 SyntacticMatches, 7 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=355, Invalid=5651, Unknown=0, NotChecked=0, Total=6006 [2021-11-19 04:50:33,120 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 183 mSDsluCounter, 3049 mSDsCounter, 0 mSdLazyCounter, 1742 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 3151 SdHoareTripleChecker+Invalid, 1796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:50:33,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 3151 Invalid, 1796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1742 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 04:50:33,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2021-11-19 04:50:33,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 910. [2021-11-19 04:50:33,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 909 states have (on average 1.11001100110011) internal successors, (1009), 909 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:33,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 1009 transitions. [2021-11-19 04:50:33,583 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 1009 transitions. Word has length 46 [2021-11-19 04:50:33,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:50:33,583 INFO L470 AbstractCegarLoop]: Abstraction has 910 states and 1009 transitions. [2021-11-19 04:50:33,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.4) internal successors, (70), 50 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:33,583 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 1009 transitions. [2021-11-19 04:50:33,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-19 04:50:33,584 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:50:33,584 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:50:33,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-11-19 04:50:33,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-11-19 04:50:33,785 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:50:33,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:50:33,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1560702865, now seen corresponding path program 95 times [2021-11-19 04:50:33,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:50:33,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238348962] [2021-11-19 04:50:33,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:50:33,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:50:33,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:50:34,229 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 04:50:34,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:50:34,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238348962] [2021-11-19 04:50:34,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238348962] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:50:34,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498235534] [2021-11-19 04:50:34,229 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 04:50:34,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:50:34,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:50:34,230 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:50:34,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-11-19 04:50:34,281 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-19 04:50:34,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:50:34,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-19 04:50:34,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:50:35,020 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 04:50:35,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:50:35,365 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 04:50:35,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498235534] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:50:35,365 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:50:35,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 48 [2021-11-19 04:50:35,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365774736] [2021-11-19 04:50:35,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:50:35,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-19 04:50:35,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:50:35,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-19 04:50:35,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=2126, Unknown=0, NotChecked=0, Total=2256 [2021-11-19 04:50:35,366 INFO L87 Difference]: Start difference. First operand 910 states and 1009 transitions. Second operand has 48 states, 48 states have (on average 1.4166666666666667) internal successors, (68), 48 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:37,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:50:37,273 INFO L93 Difference]: Finished difference Result 1044 states and 1142 transitions. [2021-11-19 04:50:37,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-19 04:50:37,273 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.4166666666666667) internal successors, (68), 48 states have internal predecessors, (68), 0 states have call successors, (0), 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 46 [2021-11-19 04:50:37,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:50:37,274 INFO L225 Difference]: With dead ends: 1044 [2021-11-19 04:50:37,274 INFO L226 Difference]: Without dead ends: 1011 [2021-11-19 04:50:37,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 65 SyntacticMatches, 7 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=349, Invalid=5053, Unknown=0, NotChecked=0, Total=5402 [2021-11-19 04:50:37,276 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 133 mSDsluCounter, 1968 mSDsCounter, 0 mSdLazyCounter, 1363 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 2036 SdHoareTripleChecker+Invalid, 1411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:50:37,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 2036 Invalid, 1411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1363 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 04:50:37,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2021-11-19 04:50:37,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 895. [2021-11-19 04:50:37,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 1.110738255033557) internal successors, (993), 894 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:37,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 993 transitions. [2021-11-19 04:50:37,685 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 993 transitions. Word has length 46 [2021-11-19 04:50:37,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:50:37,685 INFO L470 AbstractCegarLoop]: Abstraction has 895 states and 993 transitions. [2021-11-19 04:50:37,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.4166666666666667) internal successors, (68), 48 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:37,685 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 993 transitions. [2021-11-19 04:50:37,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-19 04:50:37,686 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:50:37,686 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:50:37,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2021-11-19 04:50:37,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:50:37,886 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:50:37,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:50:37,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1236184286, now seen corresponding path program 96 times [2021-11-19 04:50:37,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:50:37,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452605922] [2021-11-19 04:50:37,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:50:37,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:50:37,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:50:38,062 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-19 04:50:38,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:50:38,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452605922] [2021-11-19 04:50:38,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452605922] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:50:38,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681821608] [2021-11-19 04:50:38,062 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 04:50:38,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:50:38,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:50:38,063 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:50:38,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-11-19 04:50:38,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-19 04:50:38,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:50:38,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-19 04:50:38,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:50:38,561 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-19 04:50:38,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:50:38,883 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-19 04:50:38,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681821608] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:50:38,884 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:50:38,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 39 [2021-11-19 04:50:38,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281794269] [2021-11-19 04:50:38,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:50:38,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-19 04:50:38,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:50:38,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-19 04:50:38,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-11-19 04:50:38,885 INFO L87 Difference]: Start difference. First operand 895 states and 993 transitions. Second operand has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 39 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:41,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:50:41,731 INFO L93 Difference]: Finished difference Result 1147 states and 1264 transitions. [2021-11-19 04:50:41,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-19 04:50:41,732 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 39 states have internal predecessors, (61), 0 states have call successors, (0), 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 46 [2021-11-19 04:50:41,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:50:41,734 INFO L225 Difference]: With dead ends: 1147 [2021-11-19 04:50:41,734 INFO L226 Difference]: Without dead ends: 1075 [2021-11-19 04:50:41,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1113 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1420, Invalid=5386, Unknown=0, NotChecked=0, Total=6806 [2021-11-19 04:50:41,735 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 1267 mSDsluCounter, 1273 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1267 SdHoareTripleChecker+Valid, 1349 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:50:41,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1267 Valid, 1349 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:50:41,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2021-11-19 04:50:42,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 986. [2021-11-19 04:50:42,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 985 states have (on average 1.099492385786802) internal successors, (1083), 985 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:42,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 1083 transitions. [2021-11-19 04:50:42,421 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 1083 transitions. Word has length 46 [2021-11-19 04:50:42,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:50:42,421 INFO L470 AbstractCegarLoop]: Abstraction has 986 states and 1083 transitions. [2021-11-19 04:50:42,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 39 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:42,421 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 1083 transitions. [2021-11-19 04:50:42,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-19 04:50:42,422 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:50:42,422 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:50:42,445 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2021-11-19 04:50:42,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:50:42,623 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:50:42,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:50:42,623 INFO L85 PathProgramCache]: Analyzing trace with hash 833817871, now seen corresponding path program 97 times [2021-11-19 04:50:42,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:50:42,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181394447] [2021-11-19 04:50:42,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:50:42,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:50:42,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:50:43,015 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 04:50:43,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:50:43,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181394447] [2021-11-19 04:50:43,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181394447] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:50:43,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767291633] [2021-11-19 04:50:43,015 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 04:50:43,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:50:43,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:50:43,016 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:50:43,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-11-19 04:50:43,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:50:43,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-19 04:50:43,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:50:43,792 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 04:50:43,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:50:44,121 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 04:50:44,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767291633] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:50:44,122 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:50:44,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 46 [2021-11-19 04:50:44,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339089722] [2021-11-19 04:50:44,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:50:44,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-19 04:50:44,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:50:44,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-19 04:50:44,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1941, Unknown=0, NotChecked=0, Total=2070 [2021-11-19 04:50:44,123 INFO L87 Difference]: Start difference. First operand 986 states and 1083 transitions. Second operand has 46 states, 46 states have (on average 1.434782608695652) internal successors, (66), 46 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:45,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:50:45,783 INFO L93 Difference]: Finished difference Result 1086 states and 1186 transitions. [2021-11-19 04:50:45,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-19 04:50:45,783 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.434782608695652) internal successors, (66), 46 states have internal predecessors, (66), 0 states have call successors, (0), 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 46 [2021-11-19 04:50:45,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:50:45,785 INFO L225 Difference]: With dead ends: 1086 [2021-11-19 04:50:45,785 INFO L226 Difference]: Without dead ends: 1052 [2021-11-19 04:50:45,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 65 SyntacticMatches, 7 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=343, Invalid=4487, Unknown=0, NotChecked=0, Total=4830 [2021-11-19 04:50:45,786 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 114 mSDsluCounter, 980 mSDsCounter, 0 mSdLazyCounter, 898 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1020 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:50:45,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 1020 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 898 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:50:45,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2021-11-19 04:50:46,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 981. [2021-11-19 04:50:46,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 980 states have (on average 1.1010204081632653) internal successors, (1079), 980 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:46,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 1079 transitions. [2021-11-19 04:50:46,331 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 1079 transitions. Word has length 46 [2021-11-19 04:50:46,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:50:46,331 INFO L470 AbstractCegarLoop]: Abstraction has 981 states and 1079 transitions. [2021-11-19 04:50:46,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.434782608695652) internal successors, (66), 46 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:46,331 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 1079 transitions. [2021-11-19 04:50:46,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-19 04:50:46,332 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:50:46,332 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:50:46,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2021-11-19 04:50:46,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-11-19 04:50:46,533 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:50:46,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:50:46,533 INFO L85 PathProgramCache]: Analyzing trace with hash -175659490, now seen corresponding path program 98 times [2021-11-19 04:50:46,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:50:46,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5309266] [2021-11-19 04:50:46,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:50:46,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:50:46,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:50:46,716 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-19 04:50:46,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:50:46,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5309266] [2021-11-19 04:50:46,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5309266] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:50:46,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586897375] [2021-11-19 04:50:46,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:50:46,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:50:46,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:50:46,718 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:50:46,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-11-19 04:50:46,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:50:46,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:50:46,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-19 04:50:46,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:50:47,232 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-19 04:50:47,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:50:47,589 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-19 04:50:47,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586897375] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:50:47,589 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:50:47,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 40 [2021-11-19 04:50:47,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059029200] [2021-11-19 04:50:47,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:50:47,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-19 04:50:47,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:50:47,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-19 04:50:47,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1443, Unknown=0, NotChecked=0, Total=1560 [2021-11-19 04:50:47,592 INFO L87 Difference]: Start difference. First operand 981 states and 1079 transitions. Second operand has 40 states, 40 states have (on average 1.55) internal successors, (62), 40 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:49,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:50:49,476 INFO L93 Difference]: Finished difference Result 1076 states and 1168 transitions. [2021-11-19 04:50:49,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-19 04:50:49,476 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.55) internal successors, (62), 40 states have internal predecessors, (62), 0 states have call successors, (0), 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 46 [2021-11-19 04:50:49,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:50:49,477 INFO L225 Difference]: With dead ends: 1076 [2021-11-19 04:50:49,477 INFO L226 Difference]: Without dead ends: 1037 [2021-11-19 04:50:49,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=387, Invalid=3035, Unknown=0, NotChecked=0, Total=3422 [2021-11-19 04:50:49,478 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 1016 mSDsluCounter, 2435 mSDsCounter, 0 mSdLazyCounter, 1106 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1016 SdHoareTripleChecker+Valid, 2542 SdHoareTripleChecker+Invalid, 1149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:50:49,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1016 Valid, 2542 Invalid, 1149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1106 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 04:50:49,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2021-11-19 04:50:50,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 981. [2021-11-19 04:50:50,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 980 states have (on average 1.0887755102040817) internal successors, (1067), 980 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:50,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 1067 transitions. [2021-11-19 04:50:50,066 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 1067 transitions. Word has length 46 [2021-11-19 04:50:50,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:50:50,066 INFO L470 AbstractCegarLoop]: Abstraction has 981 states and 1067 transitions. [2021-11-19 04:50:50,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.55) internal successors, (62), 40 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:50:50,066 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 1067 transitions. [2021-11-19 04:50:50,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-19 04:50:50,067 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:50:50,068 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:50:50,093 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2021-11-19 04:50:50,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-11-19 04:50:50,268 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:50:50,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:50:50,268 INFO L85 PathProgramCache]: Analyzing trace with hash 643092471, now seen corresponding path program 99 times [2021-11-19 04:50:50,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:50:50,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64622604] [2021-11-19 04:50:50,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:50:50,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:50:50,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:50:50,864 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:50:50,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:50:50,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64622604] [2021-11-19 04:50:50,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64622604] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:50:50,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517545050] [2021-11-19 04:50:50,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:50:50,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:50:50,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:50:50,865 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:50:50,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-11-19 04:50:50,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-19 04:50:50,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:50:50,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-19 04:50:50,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:50:52,151 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:50:52,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:50:52,963 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:50:52,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517545050] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:50:52,963 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:50:52,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 69 [2021-11-19 04:50:52,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267117664] [2021-11-19 04:50:52,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:50:52,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-11-19 04:50:52,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:50:52,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-11-19 04:50:52,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=4501, Unknown=0, NotChecked=0, Total=4692 [2021-11-19 04:50:52,964 INFO L87 Difference]: Start difference. First operand 981 states and 1067 transitions. Second operand has 69 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) [2021-11-19 04:51:05,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:51:05,257 INFO L93 Difference]: Finished difference Result 1701 states and 1808 transitions. [2021-11-19 04:51:05,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-11-19 04:51:05,258 INFO L78 Accepts]: Start accepts. Automaton has has 69 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) Word has length 47 [2021-11-19 04:51:05,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:51:05,259 INFO L225 Difference]: With dead ends: 1701 [2021-11-19 04:51:05,259 INFO L226 Difference]: Without dead ends: 1647 [2021-11-19 04:51:05,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7684 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=7467, Invalid=29975, Unknown=0, NotChecked=0, Total=37442 [2021-11-19 04:51:05,261 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 4051 mSDsluCounter, 2984 mSDsCounter, 0 mSdLazyCounter, 2186 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4051 SdHoareTripleChecker+Valid, 3103 SdHoareTripleChecker+Invalid, 2383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 2186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:51:05,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4051 Valid, 3103 Invalid, 2383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 2186 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 04:51:05,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2021-11-19 04:51:05,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1068. [2021-11-19 04:51:05,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1068 states, 1067 states have (on average 1.0880974695407686) internal successors, (1161), 1067 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:51:05,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1161 transitions. [2021-11-19 04:51:05,911 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1161 transitions. Word has length 47 [2021-11-19 04:51:05,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:51:05,911 INFO L470 AbstractCegarLoop]: Abstraction has 1068 states and 1161 transitions. [2021-11-19 04:51:05,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 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) [2021-11-19 04:51:05,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1161 transitions. [2021-11-19 04:51:05,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-19 04:51:05,913 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:51:05,913 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:51:05,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2021-11-19 04:51:06,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:51:06,113 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:51:06,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:51:06,114 INFO L85 PathProgramCache]: Analyzing trace with hash -81145546, now seen corresponding path program 100 times [2021-11-19 04:51:06,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:51:06,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596859045] [2021-11-19 04:51:06,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:51:06,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:51:06,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:06,668 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:51:06,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:51:06,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596859045] [2021-11-19 04:51:06,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596859045] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:51:06,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039338875] [2021-11-19 04:51:06,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 04:51:06,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:51:06,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:51:06,670 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:51:06,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-11-19 04:51:06,719 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 04:51:06,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:51:06,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-19 04:51:06,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:51:07,969 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:51:07,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:51:08,829 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:51:08,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039338875] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:51:08,830 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:51:08,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 70 [2021-11-19 04:51:08,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564656057] [2021-11-19 04:51:08,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:51:08,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-11-19 04:51:08,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:51:08,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-11-19 04:51:08,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=4623, Unknown=0, NotChecked=0, Total=4830 [2021-11-19 04:51:08,831 INFO L87 Difference]: Start difference. First operand 1068 states and 1161 transitions. Second operand has 70 states, 70 states have (on average 1.4285714285714286) internal successors, (100), 70 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:51:14,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:51:14,468 INFO L93 Difference]: Finished difference Result 1681 states and 1781 transitions. [2021-11-19 04:51:14,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-19 04:51:14,469 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.4285714285714286) internal successors, (100), 70 states have internal predecessors, (100), 0 states have call successors, (0), 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 47 [2021-11-19 04:51:14,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:51:14,472 INFO L225 Difference]: With dead ends: 1681 [2021-11-19 04:51:14,472 INFO L226 Difference]: Without dead ends: 1654 [2021-11-19 04:51:14,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=951, Invalid=10391, Unknown=0, NotChecked=0, Total=11342 [2021-11-19 04:51:14,474 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 3101 mSDsluCounter, 7686 mSDsCounter, 0 mSdLazyCounter, 2856 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3101 SdHoareTripleChecker+Valid, 7880 SdHoareTripleChecker+Invalid, 2974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 2856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:51:14,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3101 Valid, 7880 Invalid, 2974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 2856 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 04:51:14,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1654 states. [2021-11-19 04:51:15,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1654 to 1075. [2021-11-19 04:51:15,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1075 states, 1074 states have (on average 1.0875232774674115) internal successors, (1168), 1074 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:51:15,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1075 states to 1075 states and 1168 transitions. [2021-11-19 04:51:15,160 INFO L78 Accepts]: Start accepts. Automaton has 1075 states and 1168 transitions. Word has length 47 [2021-11-19 04:51:15,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:51:15,160 INFO L470 AbstractCegarLoop]: Abstraction has 1075 states and 1168 transitions. [2021-11-19 04:51:15,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.4285714285714286) internal successors, (100), 70 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:51:15,160 INFO L276 IsEmpty]: Start isEmpty. Operand 1075 states and 1168 transitions. [2021-11-19 04:51:15,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-19 04:51:15,161 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:51:15,161 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:51:15,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2021-11-19 04:51:15,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:51:15,362 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:51:15,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:51:15,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1748834856, now seen corresponding path program 101 times [2021-11-19 04:51:15,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:51:15,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914381899] [2021-11-19 04:51:15,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:51:15,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:51:15,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:15,497 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-19 04:51:15,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:51:15,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914381899] [2021-11-19 04:51:15,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914381899] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:51:15,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55500359] [2021-11-19 04:51:15,498 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 04:51:15,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:51:15,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:51:15,499 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:51:15,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-11-19 04:51:15,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-19 04:51:15,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:51:15,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 04:51:15,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:51:15,737 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-19 04:51:15,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:51:15,838 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-19 04:51:15,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55500359] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:51:15,838 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:51:15,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2021-11-19 04:51:15,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950529114] [2021-11-19 04:51:15,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:51:15,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-19 04:51:15,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:51:15,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-19 04:51:15,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=424, Unknown=0, NotChecked=0, Total=650 [2021-11-19 04:51:15,839 INFO L87 Difference]: Start difference. First operand 1075 states and 1168 transitions. Second operand has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:51:16,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:51:16,924 INFO L93 Difference]: Finished difference Result 1293 states and 1403 transitions. [2021-11-19 04:51:16,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-19 04:51:16,924 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 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 47 [2021-11-19 04:51:16,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:51:16,925 INFO L225 Difference]: With dead ends: 1293 [2021-11-19 04:51:16,925 INFO L226 Difference]: Without dead ends: 1117 [2021-11-19 04:51:16,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=744, Invalid=1418, Unknown=0, NotChecked=0, Total=2162 [2021-11-19 04:51:16,926 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 201 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:51:16,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 559 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:51:16,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2021-11-19 04:51:17,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 1061. [2021-11-19 04:51:17,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1061 states, 1060 states have (on average 1.0849056603773586) internal successors, (1150), 1060 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:51:17,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 1150 transitions. [2021-11-19 04:51:17,522 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 1150 transitions. Word has length 47 [2021-11-19 04:51:17,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:51:17,522 INFO L470 AbstractCegarLoop]: Abstraction has 1061 states and 1150 transitions. [2021-11-19 04:51:17,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:51:17,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 1150 transitions. [2021-11-19 04:51:17,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-19 04:51:17,523 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:51:17,524 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:51:17,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2021-11-19 04:51:17,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:51:17,725 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:51:17,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:51:17,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1303563445, now seen corresponding path program 102 times [2021-11-19 04:51:17,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:51:17,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379216504] [2021-11-19 04:51:17,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:51:17,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:51:17,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:17,861 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-19 04:51:17,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:51:17,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379216504] [2021-11-19 04:51:17,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379216504] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:51:17,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118478841] [2021-11-19 04:51:17,862 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 04:51:17,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:51:17,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:51:17,863 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:51:17,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-11-19 04:51:17,923 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-19 04:51:17,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:51:17,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 04:51:17,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:51:18,152 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-19 04:51:18,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:51:18,255 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-19 04:51:18,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118478841] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:51:18,255 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:51:18,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2021-11-19 04:51:18,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611271402] [2021-11-19 04:51:18,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:51:18,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-19 04:51:18,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:51:18,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-19 04:51:18,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=424, Unknown=0, NotChecked=0, Total=650 [2021-11-19 04:51:18,256 INFO L87 Difference]: Start difference. First operand 1061 states and 1150 transitions. Second operand has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:51:19,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:51:19,286 INFO L93 Difference]: Finished difference Result 1124 states and 1207 transitions. [2021-11-19 04:51:19,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-19 04:51:19,286 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 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 47 [2021-11-19 04:51:19,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:51:19,287 INFO L225 Difference]: With dead ends: 1124 [2021-11-19 04:51:19,287 INFO L226 Difference]: Without dead ends: 1118 [2021-11-19 04:51:19,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=744, Invalid=1418, Unknown=0, NotChecked=0, Total=2162 [2021-11-19 04:51:19,288 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 84 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:51:19,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 384 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:51:19,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2021-11-19 04:51:19,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 1062. [2021-11-19 04:51:19,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1062 states, 1061 states have (on average 1.0848256361922715) internal successors, (1151), 1061 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:51:19,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062 states to 1062 states and 1151 transitions. [2021-11-19 04:51:19,924 INFO L78 Accepts]: Start accepts. Automaton has 1062 states and 1151 transitions. Word has length 47 [2021-11-19 04:51:19,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:51:19,924 INFO L470 AbstractCegarLoop]: Abstraction has 1062 states and 1151 transitions. [2021-11-19 04:51:19,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:51:19,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1062 states and 1151 transitions. [2021-11-19 04:51:19,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-19 04:51:19,925 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:51:19,925 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:51:19,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2021-11-19 04:51:20,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-11-19 04:51:20,126 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:51:20,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:51:20,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1852874480, now seen corresponding path program 103 times [2021-11-19 04:51:20,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:51:20,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768099825] [2021-11-19 04:51:20,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:51:20,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:51:20,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:20,855 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:51:20,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:51:20,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768099825] [2021-11-19 04:51:20,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768099825] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:51:20,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617413516] [2021-11-19 04:51:20,855 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 04:51:20,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:51:20,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:51:20,856 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:51:20,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-11-19 04:51:20,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:20,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 75 conjunts are in the unsatisfiable core [2021-11-19 04:51:20,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:51:21,741 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:51:21,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:51:22,167 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:51:22,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617413516] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:51:22,167 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:51:22,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 59 [2021-11-19 04:51:22,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109718988] [2021-11-19 04:51:22,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:51:22,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-19 04:51:22,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:51:22,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-19 04:51:22,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=3281, Unknown=0, NotChecked=0, Total=3422 [2021-11-19 04:51:22,169 INFO L87 Difference]: Start difference. First operand 1062 states and 1151 transitions. Second operand has 59 states, 59 states have (on average 1.3220338983050848) internal successors, (78), 59 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:51:26,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:51:26,439 INFO L93 Difference]: Finished difference Result 1891 states and 1995 transitions. [2021-11-19 04:51:26,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-19 04:51:26,440 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.3220338983050848) internal successors, (78), 59 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-19 04:51:26,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:51:26,441 INFO L225 Difference]: With dead ends: 1891 [2021-11-19 04:51:26,441 INFO L226 Difference]: Without dead ends: 1882 [2021-11-19 04:51:26,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 70 SyntacticMatches, 5 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1640 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=416, Invalid=8704, Unknown=0, NotChecked=0, Total=9120 [2021-11-19 04:51:26,442 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 368 mSDsluCounter, 7974 mSDsCounter, 0 mSdLazyCounter, 3443 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 8193 SdHoareTripleChecker+Invalid, 3501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 3443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:51:26,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 8193 Invalid, 3501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 3443 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-19 04:51:26,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1882 states. [2021-11-19 04:51:27,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1882 to 1071. [2021-11-19 04:51:27,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1071 states, 1070 states have (on average 1.0850467289719625) internal successors, (1161), 1070 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:51:27,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071 states to 1071 states and 1161 transitions. [2021-11-19 04:51:27,055 INFO L78 Accepts]: Start accepts. Automaton has 1071 states and 1161 transitions. Word has length 48 [2021-11-19 04:51:27,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:51:27,055 INFO L470 AbstractCegarLoop]: Abstraction has 1071 states and 1161 transitions. [2021-11-19 04:51:27,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.3220338983050848) internal successors, (78), 59 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:51:27,056 INFO L276 IsEmpty]: Start isEmpty. Operand 1071 states and 1161 transitions. [2021-11-19 04:51:27,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-19 04:51:27,057 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:51:27,057 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:51:27,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2021-11-19 04:51:27,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-11-19 04:51:27,278 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:51:27,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:51:27,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1196812848, now seen corresponding path program 104 times [2021-11-19 04:51:27,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:51:27,279 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134841382] [2021-11-19 04:51:27,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:51:27,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:51:27,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:27,957 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:51:27,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:51:27,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134841382] [2021-11-19 04:51:27,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134841382] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:51:27,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945025412] [2021-11-19 04:51:27,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:51:27,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:51:27,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:51:27,958 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:51:27,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-11-19 04:51:28,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:51:28,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:51:28,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-19 04:51:28,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:51:28,848 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:51:28,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:51:29,228 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:51:29,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945025412] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:51:29,229 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:51:29,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 57 [2021-11-19 04:51:29,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588245147] [2021-11-19 04:51:29,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:51:29,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-19 04:51:29,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:51:29,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-19 04:51:29,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=3052, Unknown=0, NotChecked=0, Total=3192 [2021-11-19 04:51:29,230 INFO L87 Difference]: Start difference. First operand 1071 states and 1161 transitions. Second operand has 57 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 57 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:51:33,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:51:33,020 INFO L93 Difference]: Finished difference Result 1640 states and 1729 transitions. [2021-11-19 04:51:33,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-19 04:51:33,021 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 57 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-19 04:51:33,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:51:33,022 INFO L225 Difference]: With dead ends: 1640 [2021-11-19 04:51:33,022 INFO L226 Difference]: Without dead ends: 1609 [2021-11-19 04:51:33,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 68 SyntacticMatches, 7 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1475 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=385, Invalid=7805, Unknown=0, NotChecked=0, Total=8190 [2021-11-19 04:51:33,023 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 280 mSDsluCounter, 6657 mSDsCounter, 0 mSdLazyCounter, 3005 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 6848 SdHoareTripleChecker+Invalid, 3059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 3005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:51:33,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 6848 Invalid, 3059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 3005 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 04:51:33,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1609 states. [2021-11-19 04:51:33,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1609 to 1062. [2021-11-19 04:51:33,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1062 states, 1061 states have (on average 1.0848256361922715) internal successors, (1151), 1061 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:51:33,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062 states to 1062 states and 1151 transitions. [2021-11-19 04:51:33,569 INFO L78 Accepts]: Start accepts. Automaton has 1062 states and 1151 transitions. Word has length 48 [2021-11-19 04:51:33,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:51:33,569 INFO L470 AbstractCegarLoop]: Abstraction has 1062 states and 1151 transitions. [2021-11-19 04:51:33,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 57 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:51:33,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1062 states and 1151 transitions. [2021-11-19 04:51:33,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-19 04:51:33,570 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:51:33,570 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:51:33,591 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2021-11-19 04:51:33,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-11-19 04:51:33,774 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:51:33,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:51:33,774 INFO L85 PathProgramCache]: Analyzing trace with hash -976379632, now seen corresponding path program 105 times [2021-11-19 04:51:33,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:51:33,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59474416] [2021-11-19 04:51:33,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:51:33,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:51:33,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:34,380 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 04:51:34,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:51:34,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59474416] [2021-11-19 04:51:34,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59474416] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:51:34,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756317230] [2021-11-19 04:51:34,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:51:34,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:51:34,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:51:34,382 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:51:34,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-11-19 04:51:34,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-19 04:51:34,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:51:34,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-19 04:51:34,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:51:35,280 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 04:51:35,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:51:35,644 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 04:51:35,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756317230] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:51:35,644 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:51:35,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 55 [2021-11-19 04:51:35,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709776136] [2021-11-19 04:51:35,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:51:35,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-19 04:51:35,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:51:35,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-19 04:51:35,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2831, Unknown=0, NotChecked=0, Total=2970 [2021-11-19 04:51:35,645 INFO L87 Difference]: Start difference. First operand 1062 states and 1151 transitions. Second operand has 55 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 55 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:51:39,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:51:39,278 INFO L93 Difference]: Finished difference Result 1452 states and 1540 transitions. [2021-11-19 04:51:39,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-19 04:51:39,279 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 55 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-19 04:51:39,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:51:39,280 INFO L225 Difference]: With dead ends: 1452 [2021-11-19 04:51:39,280 INFO L226 Difference]: Without dead ends: 1420 [2021-11-19 04:51:39,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 68 SyntacticMatches, 7 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1367 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=379, Invalid=7103, Unknown=0, NotChecked=0, Total=7482 [2021-11-19 04:51:39,281 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 236 mSDsluCounter, 5936 mSDsCounter, 0 mSdLazyCounter, 3013 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 6093 SdHoareTripleChecker+Invalid, 3067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 3013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:51:39,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 6093 Invalid, 3067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 3013 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 04:51:39,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1420 states. [2021-11-19 04:51:39,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1420 to 1051. [2021-11-19 04:51:39,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1051 states, 1050 states have (on average 1.0847619047619048) internal successors, (1139), 1050 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:51:39,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 1139 transitions. [2021-11-19 04:51:39,868 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 1139 transitions. Word has length 48 [2021-11-19 04:51:39,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:51:39,868 INFO L470 AbstractCegarLoop]: Abstraction has 1051 states and 1139 transitions. [2021-11-19 04:51:39,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 55 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:51:39,869 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 1139 transitions. [2021-11-19 04:51:39,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-19 04:51:39,869 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:51:39,870 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:51:39,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2021-11-19 04:51:40,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-11-19 04:51:40,070 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:51:40,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:51:40,070 INFO L85 PathProgramCache]: Analyzing trace with hash -56699440, now seen corresponding path program 106 times [2021-11-19 04:51:40,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:51:40,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498731671] [2021-11-19 04:51:40,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:51:40,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:51:40,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:40,639 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 04:51:40,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:51:40,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498731671] [2021-11-19 04:51:40,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498731671] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:51:40,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170531197] [2021-11-19 04:51:40,640 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 04:51:40,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:51:40,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:51:40,640 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:51:40,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-11-19 04:51:40,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 04:51:40,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:51:40,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-19 04:51:40,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:51:41,637 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 04:51:41,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:51:42,060 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 04:51:42,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170531197] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:51:42,060 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:51:42,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 53 [2021-11-19 04:51:42,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704527433] [2021-11-19 04:51:42,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:51:42,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-19 04:51:42,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:51:42,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-19 04:51:42,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2618, Unknown=0, NotChecked=0, Total=2756 [2021-11-19 04:51:42,062 INFO L87 Difference]: Start difference. First operand 1051 states and 1139 transitions. Second operand has 53 states, 53 states have (on average 1.3773584905660377) internal successors, (73), 53 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:51:44,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:51:44,852 INFO L93 Difference]: Finished difference Result 1305 states and 1392 transitions. [2021-11-19 04:51:44,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-19 04:51:44,852 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.3773584905660377) internal successors, (73), 53 states have internal predecessors, (73), 0 states have call successors, (0), 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 48 [2021-11-19 04:51:44,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:51:44,853 INFO L225 Difference]: With dead ends: 1305 [2021-11-19 04:51:44,853 INFO L226 Difference]: Without dead ends: 1272 [2021-11-19 04:51:44,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 68 SyntacticMatches, 7 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1263 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=373, Invalid=6433, Unknown=0, NotChecked=0, Total=6806 [2021-11-19 04:51:44,854 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 203 mSDsluCounter, 3729 mSDsCounter, 0 mSdLazyCounter, 1991 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 3852 SdHoareTripleChecker+Invalid, 2048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:51:44,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 3852 Invalid, 2048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1991 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 04:51:44,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2021-11-19 04:51:45,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 1038. [2021-11-19 04:51:45,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 1037 states have (on average 1.0848601735776278) internal successors, (1125), 1037 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:51:45,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 1125 transitions. [2021-11-19 04:51:45,462 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 1125 transitions. Word has length 48 [2021-11-19 04:51:45,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:51:45,463 INFO L470 AbstractCegarLoop]: Abstraction has 1038 states and 1125 transitions. [2021-11-19 04:51:45,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.3773584905660377) internal successors, (73), 53 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:51:45,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 1125 transitions. [2021-11-19 04:51:45,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-19 04:51:45,463 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:51:45,464 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:51:45,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2021-11-19 04:51:45,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-11-19 04:51:45,664 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:51:45,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:51:45,664 INFO L85 PathProgramCache]: Analyzing trace with hash -693772016, now seen corresponding path program 107 times [2021-11-19 04:51:45,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:51:45,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732542899] [2021-11-19 04:51:45,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:51:45,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:51:45,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:46,147 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 04:51:46,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:51:46,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732542899] [2021-11-19 04:51:46,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732542899] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:51:46,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457720025] [2021-11-19 04:51:46,147 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 04:51:46,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:51:46,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:51:46,148 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:51:46,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-11-19 04:51:46,195 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-19 04:51:46,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:51:46,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-19 04:51:46,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:51:47,005 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 04:51:47,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:51:47,347 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 04:51:47,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457720025] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:51:47,348 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:51:47,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 51 [2021-11-19 04:51:47,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213726353] [2021-11-19 04:51:47,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:51:47,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-19 04:51:47,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:51:47,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-19 04:51:47,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2413, Unknown=0, NotChecked=0, Total=2550 [2021-11-19 04:51:47,349 INFO L87 Difference]: Start difference. First operand 1038 states and 1125 transitions. Second operand has 51 states, 51 states have (on average 1.392156862745098) internal successors, (71), 51 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) [2021-11-19 04:51:49,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:51:49,673 INFO L93 Difference]: Finished difference Result 1191 states and 1277 transitions. [2021-11-19 04:51:49,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-19 04:51:49,674 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.392156862745098) internal successors, (71), 51 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) Word has length 48 [2021-11-19 04:51:49,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:51:49,675 INFO L225 Difference]: With dead ends: 1191 [2021-11-19 04:51:49,675 INFO L226 Difference]: Without dead ends: 1157 [2021-11-19 04:51:49,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 68 SyntacticMatches, 7 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1163 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=367, Invalid=5795, Unknown=0, NotChecked=0, Total=6162 [2021-11-19 04:51:49,676 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 155 mSDsluCounter, 2514 mSDsCounter, 0 mSdLazyCounter, 1545 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 2603 SdHoareTripleChecker+Invalid, 1601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:51:49,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 2603 Invalid, 1601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1545 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 04:51:49,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2021-11-19 04:51:50,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 1023. [2021-11-19 04:51:50,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 1.0851272015655578) internal successors, (1109), 1022 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:51:50,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1109 transitions. [2021-11-19 04:51:50,220 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1109 transitions. Word has length 48 [2021-11-19 04:51:50,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:51:50,221 INFO L470 AbstractCegarLoop]: Abstraction has 1023 states and 1109 transitions. [2021-11-19 04:51:50,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.392156862745098) internal successors, (71), 51 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) [2021-11-19 04:51:50,221 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1109 transitions. [2021-11-19 04:51:50,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-19 04:51:50,222 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:51:50,222 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:51:50,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2021-11-19 04:51:50,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-11-19 04:51:50,422 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:51:50,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:51:50,423 INFO L85 PathProgramCache]: Analyzing trace with hash 368678352, now seen corresponding path program 108 times [2021-11-19 04:51:50,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:51:50,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985354667] [2021-11-19 04:51:50,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:51:50,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:51:50,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:50,899 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 04:51:50,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:51:50,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985354667] [2021-11-19 04:51:50,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985354667] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:51:50,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860478756] [2021-11-19 04:51:50,900 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 04:51:50,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:51:50,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:51:50,901 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:51:50,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-11-19 04:51:50,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-19 04:51:50,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:51:50,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-19 04:51:50,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:51:51,823 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 04:51:51,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:51:52,192 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 04:51:52,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860478756] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:51:52,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:51:52,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 49 [2021-11-19 04:51:52,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271517858] [2021-11-19 04:51:52,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:51:52,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-19 04:51:52,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:51:52,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-19 04:51:52,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=2216, Unknown=0, NotChecked=0, Total=2352 [2021-11-19 04:51:52,194 INFO L87 Difference]: Start difference. First operand 1023 states and 1109 transitions. Second operand has 49 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:51:54,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:51:54,003 INFO L93 Difference]: Finished difference Result 1095 states and 1180 transitions. [2021-11-19 04:51:54,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-19 04:51:54,004 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 0 states have call successors, (0), 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 48 [2021-11-19 04:51:54,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:51:54,005 INFO L225 Difference]: With dead ends: 1095 [2021-11-19 04:51:54,005 INFO L226 Difference]: Without dead ends: 1060 [2021-11-19 04:51:54,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 68 SyntacticMatches, 7 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=361, Invalid=5189, Unknown=0, NotChecked=0, Total=5550 [2021-11-19 04:51:54,005 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 112 mSDsluCounter, 1417 mSDsCounter, 0 mSdLazyCounter, 1155 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 1472 SdHoareTripleChecker+Invalid, 1203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:51:54,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 1472 Invalid, 1203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1155 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:51:54,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2021-11-19 04:51:54,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 1006. [2021-11-19 04:51:54,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 1005 states have (on average 1.0855721393034825) internal successors, (1091), 1005 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:51:54,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 1091 transitions. [2021-11-19 04:51:54,604 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 1091 transitions. Word has length 48 [2021-11-19 04:51:54,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:51:54,604 INFO L470 AbstractCegarLoop]: Abstraction has 1006 states and 1091 transitions. [2021-11-19 04:51:54,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:51:54,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 1091 transitions. [2021-11-19 04:51:54,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-19 04:51:54,605 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:51:54,605 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:51:54,627 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2021-11-19 04:51:54,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-11-19 04:51:54,806 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:51:54,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:51:54,806 INFO L85 PathProgramCache]: Analyzing trace with hash -937942768, now seen corresponding path program 109 times [2021-11-19 04:51:54,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:51:54,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872725936] [2021-11-19 04:51:54,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:51:54,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:51:54,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:55,190 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 04:51:55,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:51:55,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872725936] [2021-11-19 04:51:55,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872725936] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:51:55,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193968704] [2021-11-19 04:51:55,191 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 04:51:55,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:51:55,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:51:55,191 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:51:55,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-11-19 04:51:55,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:55,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-19 04:51:55,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:51:56,110 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 04:51:56,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:51:56,439 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 04:51:56,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193968704] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:51:56,439 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:51:56,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 47 [2021-11-19 04:51:56,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093103537] [2021-11-19 04:51:56,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:51:56,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-19 04:51:56,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:51:56,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-19 04:51:56,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2021-11-19 04:51:56,441 INFO L87 Difference]: Start difference. First operand 1006 states and 1091 transitions. Second operand has 47 states, 47 states have (on average 1.425531914893617) internal successors, (67), 47 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:51:58,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:51:58,078 INFO L93 Difference]: Finished difference Result 1058 states and 1145 transitions. [2021-11-19 04:51:58,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-19 04:51:58,079 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.425531914893617) internal successors, (67), 47 states have internal predecessors, (67), 0 states have call successors, (0), 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 48 [2021-11-19 04:51:58,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:51:58,080 INFO L225 Difference]: With dead ends: 1058 [2021-11-19 04:51:58,080 INFO L226 Difference]: Without dead ends: 1052 [2021-11-19 04:51:58,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 68 SyntacticMatches, 7 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=355, Invalid=4615, Unknown=0, NotChecked=0, Total=4970 [2021-11-19 04:51:58,080 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 96 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:51:58,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 717 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 855 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:51:58,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2021-11-19 04:51:58,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 1021. [2021-11-19 04:51:58,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 1020 states have (on average 1.0862745098039215) internal successors, (1108), 1020 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:51:58,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 1108 transitions. [2021-11-19 04:51:58,634 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 1108 transitions. Word has length 48 [2021-11-19 04:51:58,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:51:58,635 INFO L470 AbstractCegarLoop]: Abstraction has 1021 states and 1108 transitions. [2021-11-19 04:51:58,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.425531914893617) internal successors, (67), 47 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:51:58,635 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 1108 transitions. [2021-11-19 04:51:58,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-19 04:51:58,636 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:51:58,636 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:51:58,661 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2021-11-19 04:51:58,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:51:58,836 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:51:58,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:51:58,837 INFO L85 PathProgramCache]: Analyzing trace with hash -941896586, now seen corresponding path program 110 times [2021-11-19 04:51:58,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:51:58,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288412721] [2021-11-19 04:51:58,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:51:58,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:51:58,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:59,567 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:51:59,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:51:59,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288412721] [2021-11-19 04:51:59,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288412721] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:51:59,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610869771] [2021-11-19 04:51:59,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:51:59,568 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:51:59,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:51:59,569 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:51:59,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-11-19 04:51:59,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:51:59,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:51:59,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-19 04:51:59,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:52:01,186 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:52:01,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:52:02,161 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:52:02,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610869771] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:52:02,161 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:52:02,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 74 [2021-11-19 04:52:02,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213174796] [2021-11-19 04:52:02,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:52:02,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-11-19 04:52:02,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:02,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-11-19 04:52:02,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=5197, Unknown=0, NotChecked=0, Total=5402 [2021-11-19 04:52:02,163 INFO L87 Difference]: Start difference. First operand 1021 states and 1108 transitions. Second operand has 74 states, 74 states have (on average 1.4054054054054055) internal successors, (104), 74 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:52:17,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:17,164 INFO L93 Difference]: Finished difference Result 1805 states and 1913 transitions. [2021-11-19 04:52:17,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-11-19 04:52:17,165 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.4054054054054055) internal successors, (104), 74 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-19 04:52:17,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:17,166 INFO L225 Difference]: With dead ends: 1805 [2021-11-19 04:52:17,166 INFO L226 Difference]: Without dead ends: 1749 [2021-11-19 04:52:17,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9829 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=9218, Invalid=37222, Unknown=0, NotChecked=0, Total=46440 [2021-11-19 04:52:17,168 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 4927 mSDsluCounter, 3373 mSDsCounter, 0 mSdLazyCounter, 2756 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4927 SdHoareTripleChecker+Valid, 3500 SdHoareTripleChecker+Invalid, 2990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 2756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:17,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4927 Valid, 3500 Invalid, 2990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 2756 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 04:52:17,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1749 states. [2021-11-19 04:52:17,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1749 to 1109. [2021-11-19 04:52:17,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1109 states, 1108 states have (on average 1.0857400722021662) internal successors, (1203), 1108 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:52:17,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 1203 transitions. [2021-11-19 04:52:17,846 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 1203 transitions. Word has length 49 [2021-11-19 04:52:17,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:17,847 INFO L470 AbstractCegarLoop]: Abstraction has 1109 states and 1203 transitions. [2021-11-19 04:52:17,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.4054054054054055) internal successors, (104), 74 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:52:17,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 1203 transitions. [2021-11-19 04:52:17,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-19 04:52:17,848 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:17,848 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:17,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2021-11-19 04:52:18,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-11-19 04:52:18,054 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:18,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:18,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1918438633, now seen corresponding path program 111 times [2021-11-19 04:52:18,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:18,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030744663] [2021-11-19 04:52:18,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:18,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:18,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:18,559 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:52:18,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:18,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030744663] [2021-11-19 04:52:18,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030744663] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:52:18,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140502647] [2021-11-19 04:52:18,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:52:18,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:52:18,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:52:18,560 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:52:18,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-11-19 04:52:18,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-19 04:52:18,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:52:18,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-19 04:52:18,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:52:20,036 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:52:20,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:52:21,150 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:52:21,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140502647] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:52:21,150 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:52:21,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 75 [2021-11-19 04:52:21,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423333132] [2021-11-19 04:52:21,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:52:21,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-11-19 04:52:21,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:21,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-11-19 04:52:21,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=5328, Unknown=0, NotChecked=0, Total=5550 [2021-11-19 04:52:21,153 INFO L87 Difference]: Start difference. First operand 1109 states and 1203 transitions. Second operand has 75 states, 75 states have (on average 1.4) internal successors, (105), 75 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) [2021-11-19 04:52:28,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:28,024 INFO L93 Difference]: Finished difference Result 1784 states and 1885 transitions. [2021-11-19 04:52:28,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-19 04:52:28,025 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.4) internal successors, (105), 75 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 49 [2021-11-19 04:52:28,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:28,026 INFO L225 Difference]: With dead ends: 1784 [2021-11-19 04:52:28,026 INFO L226 Difference]: Without dead ends: 1756 [2021-11-19 04:52:28,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1706 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1066, Invalid=12044, Unknown=0, NotChecked=0, Total=13110 [2021-11-19 04:52:28,027 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 3519 mSDsluCounter, 9283 mSDsCounter, 0 mSdLazyCounter, 3550 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3519 SdHoareTripleChecker+Valid, 9493 SdHoareTripleChecker+Invalid, 3688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 3550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:28,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3519 Valid, 9493 Invalid, 3688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 3550 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-19 04:52:28,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1756 states. [2021-11-19 04:52:28,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1756 to 1116. [2021-11-19 04:52:28,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1116 states, 1115 states have (on average 1.0852017937219731) internal successors, (1210), 1115 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:52:28,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 1210 transitions. [2021-11-19 04:52:28,669 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 1210 transitions. Word has length 49 [2021-11-19 04:52:28,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:28,670 INFO L470 AbstractCegarLoop]: Abstraction has 1116 states and 1210 transitions. [2021-11-19 04:52:28,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.4) internal successors, (105), 75 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) [2021-11-19 04:52:28,670 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 1210 transitions. [2021-11-19 04:52:28,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-19 04:52:28,672 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:28,672 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:28,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2021-11-19 04:52:28,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:52:28,886 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:28,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:28,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1705158635, now seen corresponding path program 112 times [2021-11-19 04:52:28,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:28,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504971297] [2021-11-19 04:52:28,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:28,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:28,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:29,066 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-19 04:52:29,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:29,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504971297] [2021-11-19 04:52:29,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504971297] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:52:29,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853999392] [2021-11-19 04:52:29,067 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 04:52:29,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:52:29,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:52:29,068 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:52:29,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-11-19 04:52:29,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 04:52:29,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:52:29,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 04:52:29,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:52:29,360 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-19 04:52:29,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:52:29,447 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-19 04:52:29,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853999392] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:52:29,447 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:52:29,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 28 [2021-11-19 04:52:29,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439542476] [2021-11-19 04:52:29,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:52:29,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-19 04:52:29,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:29,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-19 04:52:29,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2021-11-19 04:52:29,448 INFO L87 Difference]: Start difference. First operand 1116 states and 1210 transitions. Second operand has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:52:30,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:30,879 INFO L93 Difference]: Finished difference Result 1249 states and 1353 transitions. [2021-11-19 04:52:30,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-19 04:52:30,880 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 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 49 [2021-11-19 04:52:30,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:30,881 INFO L225 Difference]: With dead ends: 1249 [2021-11-19 04:52:30,881 INFO L226 Difference]: Without dead ends: 1231 [2021-11-19 04:52:30,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=719, Invalid=2251, Unknown=0, NotChecked=0, Total=2970 [2021-11-19 04:52:30,882 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 319 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:30,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 491 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:52:30,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1231 states. [2021-11-19 04:52:31,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1231 to 1162. [2021-11-19 04:52:31,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 1161 states have (on average 1.0947459086993971) internal successors, (1271), 1161 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:52:31,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1271 transitions. [2021-11-19 04:52:31,596 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1271 transitions. Word has length 49 [2021-11-19 04:52:31,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:31,596 INFO L470 AbstractCegarLoop]: Abstraction has 1162 states and 1271 transitions. [2021-11-19 04:52:31,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:52:31,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1271 transitions. [2021-11-19 04:52:31,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-19 04:52:31,598 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:31,598 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:31,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2021-11-19 04:52:31,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:52:31,798 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:31,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:31,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1570091816, now seen corresponding path program 113 times [2021-11-19 04:52:31,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:31,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898202934] [2021-11-19 04:52:31,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:31,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:31,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:31,927 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-19 04:52:31,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:31,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898202934] [2021-11-19 04:52:31,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898202934] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:52:31,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134530983] [2021-11-19 04:52:31,927 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 04:52:31,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:52:31,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:52:31,928 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:52:31,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-11-19 04:52:31,979 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-19 04:52:31,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:52:31,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 04:52:31,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:52:32,187 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-19 04:52:32,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:52:32,271 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-19 04:52:32,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134530983] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:52:32,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:52:32,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 28 [2021-11-19 04:52:32,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89811827] [2021-11-19 04:52:32,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:52:32,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-19 04:52:32,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:32,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-19 04:52:32,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2021-11-19 04:52:32,272 INFO L87 Difference]: Start difference. First operand 1162 states and 1271 transitions. Second operand has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:52:34,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:34,210 INFO L93 Difference]: Finished difference Result 1857 states and 2062 transitions. [2021-11-19 04:52:34,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-19 04:52:34,210 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 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 49 [2021-11-19 04:52:34,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:34,212 INFO L225 Difference]: With dead ends: 1857 [2021-11-19 04:52:34,212 INFO L226 Difference]: Without dead ends: 1607 [2021-11-19 04:52:34,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=719, Invalid=2251, Unknown=0, NotChecked=0, Total=2970 [2021-11-19 04:52:34,213 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 841 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:34,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [841 Valid, 710 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:52:34,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2021-11-19 04:52:35,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 1304. [2021-11-19 04:52:35,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1304 states, 1303 states have (on average 1.0959324635456638) internal successors, (1428), 1303 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:52:35,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1304 states to 1304 states and 1428 transitions. [2021-11-19 04:52:35,033 INFO L78 Accepts]: Start accepts. Automaton has 1304 states and 1428 transitions. Word has length 49 [2021-11-19 04:52:35,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:35,033 INFO L470 AbstractCegarLoop]: Abstraction has 1304 states and 1428 transitions. [2021-11-19 04:52:35,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:52:35,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1304 states and 1428 transitions. [2021-11-19 04:52:35,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-19 04:52:35,034 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:35,034 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:35,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2021-11-19 04:52:35,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-11-19 04:52:35,235 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:35,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:35,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1320581967, now seen corresponding path program 114 times [2021-11-19 04:52:35,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:35,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684968761] [2021-11-19 04:52:35,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:35,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:35,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:36,163 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:52:36,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:36,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684968761] [2021-11-19 04:52:36,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684968761] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:52:36,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771062751] [2021-11-19 04:52:36,164 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 04:52:36,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:52:36,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:52:36,165 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:52:36,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-11-19 04:52:36,226 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-19 04:52:36,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:52:36,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 79 conjunts are in the unsatisfiable core [2021-11-19 04:52:36,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:52:37,279 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:52:37,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:52:37,684 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:52:37,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771062751] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:52:37,684 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:52:37,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 62 [2021-11-19 04:52:37,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894272979] [2021-11-19 04:52:37,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:52:37,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-19 04:52:37,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:37,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-19 04:52:37,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=3634, Unknown=0, NotChecked=0, Total=3782 [2021-11-19 04:52:37,686 INFO L87 Difference]: Start difference. First operand 1304 states and 1428 transitions. Second operand has 62 states, 62 states have (on average 1.3064516129032258) internal successors, (81), 62 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:52:43,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:43,628 INFO L93 Difference]: Finished difference Result 2358 states and 2500 transitions. [2021-11-19 04:52:43,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-19 04:52:43,628 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.3064516129032258) internal successors, (81), 62 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-19 04:52:43,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:43,630 INFO L225 Difference]: With dead ends: 2358 [2021-11-19 04:52:43,630 INFO L226 Difference]: Without dead ends: 2349 [2021-11-19 04:52:43,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 73 SyntacticMatches, 5 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1818 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=435, Invalid=9665, Unknown=0, NotChecked=0, Total=10100 [2021-11-19 04:52:43,631 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 388 mSDsluCounter, 9621 mSDsCounter, 0 mSdLazyCounter, 4197 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 9857 SdHoareTripleChecker+Invalid, 4257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 4197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:43,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 9857 Invalid, 4257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 4197 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-19 04:52:43,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2349 states. [2021-11-19 04:52:44,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2349 to 1313. [2021-11-19 04:52:44,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1313 states, 1312 states have (on average 1.0960365853658536) internal successors, (1438), 1312 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:52:44,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1313 states to 1313 states and 1438 transitions. [2021-11-19 04:52:44,426 INFO L78 Accepts]: Start accepts. Automaton has 1313 states and 1438 transitions. Word has length 50 [2021-11-19 04:52:44,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:44,426 INFO L470 AbstractCegarLoop]: Abstraction has 1313 states and 1438 transitions. [2021-11-19 04:52:44,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.3064516129032258) internal successors, (81), 62 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:52:44,426 INFO L276 IsEmpty]: Start isEmpty. Operand 1313 states and 1438 transitions. [2021-11-19 04:52:44,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-19 04:52:44,428 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:44,428 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:44,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2021-11-19 04:52:44,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:52:44,628 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:44,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:44,629 INFO L85 PathProgramCache]: Analyzing trace with hash -971861649, now seen corresponding path program 115 times [2021-11-19 04:52:44,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:44,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549094237] [2021-11-19 04:52:44,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:44,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:44,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:45,434 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:52:45,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:45,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549094237] [2021-11-19 04:52:45,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549094237] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:52:45,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425348198] [2021-11-19 04:52:45,434 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 04:52:45,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:52:45,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:52:45,435 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:52:45,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-11-19 04:52:45,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:45,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 75 conjunts are in the unsatisfiable core [2021-11-19 04:52:45,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:52:46,552 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:52:46,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:52:46,997 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:52:46,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425348198] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:52:46,997 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:52:46,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 60 [2021-11-19 04:52:46,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426597273] [2021-11-19 04:52:46,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:52:46,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-19 04:52:46,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:46,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-19 04:52:46,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=3393, Unknown=0, NotChecked=0, Total=3540 [2021-11-19 04:52:46,999 INFO L87 Difference]: Start difference. First operand 1313 states and 1438 transitions. Second operand has 60 states, 60 states have (on average 1.3333333333333333) internal successors, (80), 60 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:52:52,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:52,055 INFO L93 Difference]: Finished difference Result 2070 states and 2194 transitions. [2021-11-19 04:52:52,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-19 04:52:52,055 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.3333333333333333) internal successors, (80), 60 states have internal predecessors, (80), 0 states have call successors, (0), 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 50 [2021-11-19 04:52:52,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:52,057 INFO L225 Difference]: With dead ends: 2070 [2021-11-19 04:52:52,057 INFO L226 Difference]: Without dead ends: 2038 [2021-11-19 04:52:52,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 71 SyntacticMatches, 7 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1644 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=403, Invalid=8717, Unknown=0, NotChecked=0, Total=9120 [2021-11-19 04:52:52,058 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 305 mSDsluCounter, 6814 mSDsCounter, 0 mSdLazyCounter, 3017 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 7018 SdHoareTripleChecker+Invalid, 3074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 3017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:52,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 7018 Invalid, 3074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 3017 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 04:52:52,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2038 states. [2021-11-19 04:52:52,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2038 to 1304. [2021-11-19 04:52:52,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1304 states, 1303 states have (on average 1.0959324635456638) internal successors, (1428), 1303 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:52:52,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1304 states to 1304 states and 1428 transitions. [2021-11-19 04:52:52,883 INFO L78 Accepts]: Start accepts. Automaton has 1304 states and 1428 transitions. Word has length 50 [2021-11-19 04:52:52,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:52,883 INFO L470 AbstractCegarLoop]: Abstraction has 1304 states and 1428 transitions. [2021-11-19 04:52:52,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.3333333333333333) internal successors, (80), 60 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:52:52,883 INFO L276 IsEmpty]: Start isEmpty. Operand 1304 states and 1428 transitions. [2021-11-19 04:52:52,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-19 04:52:52,885 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:52,885 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:52,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2021-11-19 04:52:53,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-11-19 04:52:53,086 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:53,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:53,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1931235633, now seen corresponding path program 116 times [2021-11-19 04:52:53,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:53,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384739031] [2021-11-19 04:52:53,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:53,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:53,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:53,836 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 04:52:53,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:53,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384739031] [2021-11-19 04:52:53,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384739031] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:52:53,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024240408] [2021-11-19 04:52:53,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:52:53,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:52:53,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:52:53,837 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:52:53,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-11-19 04:52:53,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:52:53,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:52:53,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-19 04:52:53,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:52:54,878 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 04:52:54,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:52:55,304 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 04:52:55,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024240408] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:52:55,304 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:52:55,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 58 [2021-11-19 04:52:55,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207355395] [2021-11-19 04:52:55,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:52:55,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-19 04:52:55,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:55,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-19 04:52:55,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=3160, Unknown=0, NotChecked=0, Total=3306 [2021-11-19 04:52:55,306 INFO L87 Difference]: Start difference. First operand 1304 states and 1428 transitions. Second operand has 58 states, 58 states have (on average 1.3448275862068966) internal successors, (78), 58 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:53:00,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:53:00,042 INFO L93 Difference]: Finished difference Result 1842 states and 1965 transitions. [2021-11-19 04:53:00,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-19 04:53:00,043 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.3448275862068966) internal successors, (78), 58 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-19 04:53:00,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:53:00,044 INFO L225 Difference]: With dead ends: 1842 [2021-11-19 04:53:00,044 INFO L226 Difference]: Without dead ends: 1809 [2021-11-19 04:53:00,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 71 SyntacticMatches, 7 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1530 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=397, Invalid=7975, Unknown=0, NotChecked=0, Total=8372 [2021-11-19 04:53:00,045 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 264 mSDsluCounter, 5649 mSDsCounter, 0 mSdLazyCounter, 2770 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 5819 SdHoareTripleChecker+Invalid, 2830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:53:00,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 5819 Invalid, 2830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2770 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 04:53:00,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1809 states. [2021-11-19 04:53:00,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1809 to 1293. [2021-11-19 04:53:00,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1293 states, 1292 states have (on average 1.0959752321981424) internal successors, (1416), 1292 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:53:00,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1293 states to 1293 states and 1416 transitions. [2021-11-19 04:53:00,812 INFO L78 Accepts]: Start accepts. Automaton has 1293 states and 1416 transitions. Word has length 50 [2021-11-19 04:53:00,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:53:00,812 INFO L470 AbstractCegarLoop]: Abstraction has 1293 states and 1416 transitions. [2021-11-19 04:53:00,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.3448275862068966) internal successors, (78), 58 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:53:00,812 INFO L276 IsEmpty]: Start isEmpty. Operand 1293 states and 1416 transitions. [2021-11-19 04:53:00,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-19 04:53:00,813 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:53:00,813 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:53:00,838 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2021-11-19 04:53:01,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-11-19 04:53:01,014 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:53:01,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:53:01,015 INFO L85 PathProgramCache]: Analyzing trace with hash 515890671, now seen corresponding path program 117 times [2021-11-19 04:53:01,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:53:01,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695432765] [2021-11-19 04:53:01,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:53:01,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:53:01,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:01,681 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 04:53:01,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:53:01,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695432765] [2021-11-19 04:53:01,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695432765] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:53:01,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527243126] [2021-11-19 04:53:01,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:53:01,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:53:01,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:53:01,683 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:53:01,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-11-19 04:53:01,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-19 04:53:01,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:53:01,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-19 04:53:01,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:53:02,807 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 04:53:02,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:53:03,221 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 04:53:03,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527243126] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:53:03,222 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:53:03,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 56 [2021-11-19 04:53:03,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11006737] [2021-11-19 04:53:03,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:53:03,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-19 04:53:03,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:53:03,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-19 04:53:03,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=2935, Unknown=0, NotChecked=0, Total=3080 [2021-11-19 04:53:03,223 INFO L87 Difference]: Start difference. First operand 1293 states and 1416 transitions. Second operand has 56 states, 56 states have (on average 1.3571428571428572) internal successors, (76), 56 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) [2021-11-19 04:53:07,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:53:07,219 INFO L93 Difference]: Finished difference Result 1661 states and 1783 transitions. [2021-11-19 04:53:07,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-19 04:53:07,220 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.3571428571428572) internal successors, (76), 56 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 50 [2021-11-19 04:53:07,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:53:07,221 INFO L225 Difference]: With dead ends: 1661 [2021-11-19 04:53:07,221 INFO L226 Difference]: Without dead ends: 1627 [2021-11-19 04:53:07,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 71 SyntacticMatches, 7 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=391, Invalid=7265, Unknown=0, NotChecked=0, Total=7656 [2021-11-19 04:53:07,222 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 222 mSDsluCounter, 4608 mSDsCounter, 0 mSdLazyCounter, 2469 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 4744 SdHoareTripleChecker+Invalid, 2529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:53:07,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 4744 Invalid, 2529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2469 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 04:53:07,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1627 states. [2021-11-19 04:53:07,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1627 to 1280. [2021-11-19 04:53:07,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1280 states, 1279 states have (on average 1.096168881939015) internal successors, (1402), 1279 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:53:07,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 1402 transitions. [2021-11-19 04:53:07,949 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 1402 transitions. Word has length 50 [2021-11-19 04:53:07,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:53:07,949 INFO L470 AbstractCegarLoop]: Abstraction has 1280 states and 1402 transitions. [2021-11-19 04:53:07,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.3571428571428572) internal successors, (76), 56 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) [2021-11-19 04:53:07,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 1402 transitions. [2021-11-19 04:53:07,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-19 04:53:07,951 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:53:07,951 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:53:07,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2021-11-19 04:53:08,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:53:08,152 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:53:08,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:53:08,154 INFO L85 PathProgramCache]: Analyzing trace with hash 2045370959, now seen corresponding path program 118 times [2021-11-19 04:53:08,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:53:08,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649960484] [2021-11-19 04:53:08,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:53:08,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:53:08,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:08,674 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 04:53:08,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:53:08,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649960484] [2021-11-19 04:53:08,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649960484] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:53:08,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846276309] [2021-11-19 04:53:08,674 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 04:53:08,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:53:08,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:53:08,676 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:53:08,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-11-19 04:53:08,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 04:53:08,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:53:08,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-19 04:53:08,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:53:09,807 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 04:53:09,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:53:10,193 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 04:53:10,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846276309] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:53:10,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:53:10,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 54 [2021-11-19 04:53:10,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983771667] [2021-11-19 04:53:10,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:53:10,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-19 04:53:10,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:53:10,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-19 04:53:10,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2718, Unknown=0, NotChecked=0, Total=2862 [2021-11-19 04:53:10,195 INFO L87 Difference]: Start difference. First operand 1280 states and 1402 transitions. Second operand has 54 states, 54 states have (on average 1.3703703703703705) internal successors, (74), 54 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:53:13,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:53:13,681 INFO L93 Difference]: Finished difference Result 1519 states and 1640 transitions. [2021-11-19 04:53:13,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-19 04:53:13,682 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.3703703703703705) internal successors, (74), 54 states have internal predecessors, (74), 0 states have call successors, (0), 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 50 [2021-11-19 04:53:13,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:53:13,684 INFO L225 Difference]: With dead ends: 1519 [2021-11-19 04:53:13,684 INFO L226 Difference]: Without dead ends: 1484 [2021-11-19 04:53:13,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 71 SyntacticMatches, 7 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=385, Invalid=6587, Unknown=0, NotChecked=0, Total=6972 [2021-11-19 04:53:13,685 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 176 mSDsluCounter, 3138 mSDsCounter, 0 mSdLazyCounter, 1909 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 3240 SdHoareTripleChecker+Invalid, 1963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:53:13,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 3240 Invalid, 1963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1909 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 04:53:13,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1484 states. [2021-11-19 04:53:14,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1484 to 1265. [2021-11-19 04:53:14,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 1264 states have (on average 1.0965189873417722) internal successors, (1386), 1264 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:53:14,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 1386 transitions. [2021-11-19 04:53:14,554 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 1386 transitions. Word has length 50 [2021-11-19 04:53:14,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:53:14,554 INFO L470 AbstractCegarLoop]: Abstraction has 1265 states and 1386 transitions. [2021-11-19 04:53:14,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.3703703703703705) internal successors, (74), 54 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:53:14,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 1386 transitions. [2021-11-19 04:53:14,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-19 04:53:14,555 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:53:14,556 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:53:14,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2021-11-19 04:53:14,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:53:14,758 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:53:14,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:53:14,759 INFO L85 PathProgramCache]: Analyzing trace with hash -2122831249, now seen corresponding path program 119 times [2021-11-19 04:53:14,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:53:14,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70726270] [2021-11-19 04:53:14,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:53:14,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:53:14,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:15,299 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 04:53:15,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:53:15,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70726270] [2021-11-19 04:53:15,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70726270] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:53:15,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561785919] [2021-11-19 04:53:15,299 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 04:53:15,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:53:15,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:53:15,300 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:53:15,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-11-19 04:53:15,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-19 04:53:15,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:53:15,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-19 04:53:15,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:53:16,251 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 04:53:16,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:53:16,606 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 04:53:16,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561785919] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:53:16,607 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:53:16,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 52 [2021-11-19 04:53:16,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297419195] [2021-11-19 04:53:16,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:53:16,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-19 04:53:16,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:53:16,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-19 04:53:16,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2509, Unknown=0, NotChecked=0, Total=2652 [2021-11-19 04:53:16,608 INFO L87 Difference]: Start difference. First operand 1265 states and 1386 transitions. Second operand has 52 states, 52 states have (on average 1.3846153846153846) internal successors, (72), 52 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:53:19,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:53:19,512 INFO L93 Difference]: Finished difference Result 1408 states and 1528 transitions. [2021-11-19 04:53:19,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-19 04:53:19,512 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.3846153846153846) internal successors, (72), 52 states have internal predecessors, (72), 0 states have call successors, (0), 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 50 [2021-11-19 04:53:19,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:53:19,513 INFO L225 Difference]: With dead ends: 1408 [2021-11-19 04:53:19,513 INFO L226 Difference]: Without dead ends: 1372 [2021-11-19 04:53:19,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 71 SyntacticMatches, 7 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=379, Invalid=5941, Unknown=0, NotChecked=0, Total=6320 [2021-11-19 04:53:19,514 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 136 mSDsluCounter, 2100 mSDsCounter, 0 mSdLazyCounter, 1595 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 2168 SdHoareTripleChecker+Invalid, 1653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:53:19,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 2168 Invalid, 1653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1595 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 04:53:19,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1372 states. [2021-11-19 04:53:20,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1372 to 1248. [2021-11-19 04:53:20,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 1247 states have (on average 1.0970328789093826) internal successors, (1368), 1247 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:53:20,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 1368 transitions. [2021-11-19 04:53:20,236 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 1368 transitions. Word has length 50 [2021-11-19 04:53:20,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:53:20,236 INFO L470 AbstractCegarLoop]: Abstraction has 1248 states and 1368 transitions. [2021-11-19 04:53:20,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.3846153846153846) internal successors, (72), 52 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:53:20,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 1368 transitions. [2021-11-19 04:53:20,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-19 04:53:20,238 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:53:20,238 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:53:20,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2021-11-19 04:53:20,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-11-19 04:53:20,439 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:53:20,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:53:20,439 INFO L85 PathProgramCache]: Analyzing trace with hash -539159010, now seen corresponding path program 120 times [2021-11-19 04:53:20,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:53:20,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306415829] [2021-11-19 04:53:20,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:53:20,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:53:20,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:20,693 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-19 04:53:20,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:53:20,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306415829] [2021-11-19 04:53:20,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306415829] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:53:20,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904715987] [2021-11-19 04:53:20,694 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 04:53:20,694 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:53:20,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:53:20,695 INFO L229 MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:53:20,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-11-19 04:53:20,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-19 04:53:20,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:53:20,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-19 04:53:20,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:53:21,436 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-19 04:53:21,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:53:21,868 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-19 04:53:21,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904715987] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:53:21,869 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:53:21,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 44 [2021-11-19 04:53:21,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206823269] [2021-11-19 04:53:21,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:53:21,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-19 04:53:21,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:53:21,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-19 04:53:21,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1771, Unknown=0, NotChecked=0, Total=1892 [2021-11-19 04:53:21,870 INFO L87 Difference]: Start difference. First operand 1248 states and 1368 transitions. Second operand has 44 states, 44 states have (on average 1.5) internal successors, (66), 44 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:53:26,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:53:26,020 INFO L93 Difference]: Finished difference Result 1557 states and 1699 transitions. [2021-11-19 04:53:26,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-19 04:53:26,021 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.5) internal successors, (66), 44 states have internal predecessors, (66), 0 states have call successors, (0), 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 50 [2021-11-19 04:53:26,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:53:26,022 INFO L225 Difference]: With dead ends: 1557 [2021-11-19 04:53:26,022 INFO L226 Difference]: Without dead ends: 1476 [2021-11-19 04:53:26,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1702 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2002, Invalid=7700, Unknown=0, NotChecked=0, Total=9702 [2021-11-19 04:53:26,023 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 1930 mSDsluCounter, 1540 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1930 SdHoareTripleChecker+Valid, 1628 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:53:26,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1930 Valid, 1628 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:53:26,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1476 states. [2021-11-19 04:53:26,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1476 to 1369. [2021-11-19 04:53:26,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1368 states have (on average 1.087719298245614) internal successors, (1488), 1368 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:53:26,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 1488 transitions. [2021-11-19 04:53:26,906 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 1488 transitions. Word has length 50 [2021-11-19 04:53:26,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:53:26,907 INFO L470 AbstractCegarLoop]: Abstraction has 1369 states and 1488 transitions. [2021-11-19 04:53:26,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.5) internal successors, (66), 44 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:53:26,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 1488 transitions. [2021-11-19 04:53:26,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-19 04:53:26,908 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:53:26,908 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:53:26,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2021-11-19 04:53:27,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-11-19 04:53:27,108 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:53:27,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:53:27,109 INFO L85 PathProgramCache]: Analyzing trace with hash -134146609, now seen corresponding path program 121 times [2021-11-19 04:53:27,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:53:27,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529597329] [2021-11-19 04:53:27,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:53:27,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:53:27,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:27,557 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 04:53:27,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:53:27,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529597329] [2021-11-19 04:53:27,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529597329] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:53:27,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712563232] [2021-11-19 04:53:27,558 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 04:53:27,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:53:27,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:53:27,559 INFO L229 MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:53:27,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-11-19 04:53:27,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:27,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-19 04:53:27,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:53:28,430 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 04:53:28,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:53:28,788 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 04:53:28,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712563232] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:53:28,788 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:53:28,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 50 [2021-11-19 04:53:28,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581298092] [2021-11-19 04:53:28,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:53:28,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-19 04:53:28,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:53:28,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-19 04:53:28,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=2308, Unknown=0, NotChecked=0, Total=2450 [2021-11-19 04:53:28,789 INFO L87 Difference]: Start difference. First operand 1369 states and 1488 transitions. Second operand has 50 states, 50 states have (on average 1.4) internal successors, (70), 50 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:53:31,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:53:31,091 INFO L93 Difference]: Finished difference Result 1476 states and 1598 transitions. [2021-11-19 04:53:31,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-19 04:53:31,092 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.4) internal successors, (70), 50 states have internal predecessors, (70), 0 states have call successors, (0), 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 50 [2021-11-19 04:53:31,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:53:31,093 INFO L225 Difference]: With dead ends: 1476 [2021-11-19 04:53:31,093 INFO L226 Difference]: Without dead ends: 1439 [2021-11-19 04:53:31,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 71 SyntacticMatches, 7 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1114 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=373, Invalid=5327, Unknown=0, NotChecked=0, Total=5700 [2021-11-19 04:53:31,094 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 111 mSDsluCounter, 1073 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 1113 SdHoareTripleChecker+Invalid, 1080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:53:31,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 1113 Invalid, 1080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1030 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:53:31,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1439 states. [2021-11-19 04:53:31,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1439 to 1363. [2021-11-19 04:53:31,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1362 states have (on average 1.0888399412628487) internal successors, (1483), 1362 states have internal predecessors, (1483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:53:31,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 1483 transitions. [2021-11-19 04:53:31,929 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 1483 transitions. Word has length 50 [2021-11-19 04:53:31,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:53:31,929 INFO L470 AbstractCegarLoop]: Abstraction has 1363 states and 1483 transitions. [2021-11-19 04:53:31,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.4) internal successors, (70), 50 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:53:31,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 1483 transitions. [2021-11-19 04:53:31,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-19 04:53:31,931 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:53:31,931 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:53:31,952 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2021-11-19 04:53:32,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,125 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:53:32,131 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:53:32,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:53:32,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1039518110, now seen corresponding path program 122 times [2021-11-19 04:53:32,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:53:32,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750180900] [2021-11-19 04:53:32,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:53:32,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:53:32,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:32,385 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-19 04:53:32,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:53:32,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750180900] [2021-11-19 04:53:32,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750180900] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:53:32,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182891826] [2021-11-19 04:53:32,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:53:32,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:53:32,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:53:32,395 INFO L229 MonitoredProcess]: Starting monitored process 126 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:53:32,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-11-19 04:53:32,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:53:32,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:53:32,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-19 04:53:32,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:53:33,023 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-19 04:53:33,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:53:33,441 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-19 04:53:33,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182891826] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:53:33,441 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:53:33,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 45 [2021-11-19 04:53:33,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679291997] [2021-11-19 04:53:33,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:53:33,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-19 04:53:33,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:53:33,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-19 04:53:33,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1848, Unknown=0, NotChecked=0, Total=1980 [2021-11-19 04:53:33,443 INFO L87 Difference]: Start difference. First operand 1363 states and 1483 transitions. Second operand has 45 states, 45 states have (on average 1.488888888888889) internal successors, (67), 45 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:53:36,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:53:36,171 INFO L93 Difference]: Finished difference Result 1476 states and 1589 transitions. [2021-11-19 04:53:36,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-19 04:53:36,172 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.488888888888889) internal successors, (67), 45 states have internal predecessors, (67), 0 states have call successors, (0), 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 50 [2021-11-19 04:53:36,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:53:36,173 INFO L225 Difference]: With dead ends: 1476 [2021-11-19 04:53:36,173 INFO L226 Difference]: Without dead ends: 1432 [2021-11-19 04:53:36,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=466, Invalid=3956, Unknown=0, NotChecked=0, Total=4422 [2021-11-19 04:53:36,173 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 1385 mSDsluCounter, 3149 mSDsCounter, 0 mSdLazyCounter, 1391 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1385 SdHoareTripleChecker+Valid, 3273 SdHoareTripleChecker+Invalid, 1450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:53:36,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1385 Valid, 3273 Invalid, 1450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1391 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 04:53:36,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2021-11-19 04:53:37,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 1363. [2021-11-19 04:53:37,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1362 states have (on average 1.07856093979442) internal successors, (1469), 1362 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:53:37,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 1469 transitions. [2021-11-19 04:53:37,083 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 1469 transitions. Word has length 50 [2021-11-19 04:53:37,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:53:37,084 INFO L470 AbstractCegarLoop]: Abstraction has 1363 states and 1469 transitions. [2021-11-19 04:53:37,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.488888888888889) internal successors, (67), 45 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:53:37,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 1469 transitions. [2021-11-19 04:53:37,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-19 04:53:37,085 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:53:37,085 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:53:37,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2021-11-19 04:53:37,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,126 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:53:37,286 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:53:37,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:53:37,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1348994537, now seen corresponding path program 123 times [2021-11-19 04:53:37,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:53:37,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393882232] [2021-11-19 04:53:37,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:53:37,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:53:37,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:53:37,823 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:53:37,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:53:37,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393882232] [2021-11-19 04:53:37,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393882232] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:53:37,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22679231] [2021-11-19 04:53:37,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:53:37,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:53:37,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:53:37,825 INFO L229 MonitoredProcess]: Starting monitored process 127 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:53:37,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-11-19 04:53:37,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-19 04:53:37,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:53:37,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-19 04:53:37,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:53:39,456 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:53:39,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:53:40,518 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:53:40,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22679231] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:53:40,519 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:53:40,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 79 [2021-11-19 04:53:40,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249015715] [2021-11-19 04:53:40,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:53:40,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-11-19 04:53:40,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:53:40,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-11-19 04:53:40,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=5943, Unknown=0, NotChecked=0, Total=6162 [2021-11-19 04:53:40,520 INFO L87 Difference]: Start difference. First operand 1363 states and 1469 transitions. Second operand has 79 states, 79 states have (on average 1.379746835443038) internal successors, (109), 79 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:53:59,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:53:59,360 INFO L93 Difference]: Finished difference Result 2368 states and 2498 transitions. [2021-11-19 04:53:59,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2021-11-19 04:53:59,360 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.379746835443038) internal successors, (109), 79 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-19 04:53:59,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:53:59,362 INFO L225 Difference]: With dead ends: 2368 [2021-11-19 04:53:59,362 INFO L226 Difference]: Without dead ends: 2308 [2021-11-19 04:53:59,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12382 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=11242, Invalid=45640, Unknown=0, NotChecked=0, Total=56882 [2021-11-19 04:53:59,365 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 5946 mSDsluCounter, 3819 mSDsCounter, 0 mSdLazyCounter, 3297 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5946 SdHoareTripleChecker+Valid, 3955 SdHoareTripleChecker+Invalid, 3563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 3297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:53:59,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5946 Valid, 3955 Invalid, 3563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 3297 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-19 04:53:59,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2308 states. [2021-11-19 04:54:00,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2308 to 1473. [2021-11-19 04:54:00,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1473 states, 1472 states have (on average 1.078125) internal successors, (1587), 1472 states have internal predecessors, (1587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:54:00,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1473 states to 1473 states and 1587 transitions. [2021-11-19 04:54:00,472 INFO L78 Accepts]: Start accepts. Automaton has 1473 states and 1587 transitions. Word has length 51 [2021-11-19 04:54:00,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:00,472 INFO L470 AbstractCegarLoop]: Abstraction has 1473 states and 1587 transitions. [2021-11-19 04:54:00,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.379746835443038) internal successors, (109), 79 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:54:00,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1473 states and 1587 transitions. [2021-11-19 04:54:00,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-19 04:54:00,473 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:00,474 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:00,498 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2021-11-19 04:54:00,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,127 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:54:00,677 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:54:00,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:00,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1557026922, now seen corresponding path program 124 times [2021-11-19 04:54:00,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:00,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491489404] [2021-11-19 04:54:00,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:00,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:00,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:01,324 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:54:01,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:01,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491489404] [2021-11-19 04:54:01,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491489404] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:54:01,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415959691] [2021-11-19 04:54:01,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 04:54:01,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:54:01,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:54:01,333 INFO L229 MonitoredProcess]: Starting monitored process 128 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:54:01,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-11-19 04:54:01,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 04:54:01,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:54:01,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-19 04:54:01,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:54:03,234 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:54:03,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:54:04,326 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:54:04,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415959691] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:54:04,326 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:54:04,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 80 [2021-11-19 04:54:04,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090250712] [2021-11-19 04:54:04,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:54:04,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-19 04:54:04,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:04,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-19 04:54:04,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=6083, Unknown=0, NotChecked=0, Total=6320 [2021-11-19 04:54:04,328 INFO L87 Difference]: Start difference. First operand 1473 states and 1587 transitions. Second operand has 80 states, 80 states have (on average 1.375) internal successors, (110), 80 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:54:13,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:13,165 INFO L93 Difference]: Finished difference Result 2346 states and 2468 transitions. [2021-11-19 04:54:13,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-19 04:54:13,166 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.375) internal successors, (110), 80 states have internal predecessors, (110), 0 states have call successors, (0), 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 51 [2021-11-19 04:54:13,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:13,167 INFO L225 Difference]: With dead ends: 2346 [2021-11-19 04:54:13,167 INFO L226 Difference]: Without dead ends: 2316 [2021-11-19 04:54:13,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1962 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1187, Invalid=13819, Unknown=0, NotChecked=0, Total=15006 [2021-11-19 04:54:13,168 INFO L933 BasicCegarLoop]: 226 mSDtfsCounter, 4124 mSDsluCounter, 10796 mSDsCounter, 0 mSdLazyCounter, 4168 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4124 SdHoareTripleChecker+Valid, 11022 SdHoareTripleChecker+Invalid, 4346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 4168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:13,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4124 Valid, 11022 Invalid, 4346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 4168 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-19 04:54:13,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2316 states. [2021-11-19 04:54:14,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2316 to 1481. [2021-11-19 04:54:14,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1481 states, 1480 states have (on average 1.0777027027027026) internal successors, (1595), 1480 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:54:14,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 1595 transitions. [2021-11-19 04:54:14,094 INFO L78 Accepts]: Start accepts. Automaton has 1481 states and 1595 transitions. Word has length 51 [2021-11-19 04:54:14,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:14,094 INFO L470 AbstractCegarLoop]: Abstraction has 1481 states and 1595 transitions. [2021-11-19 04:54:14,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.375) internal successors, (110), 80 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:54:14,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1481 states and 1595 transitions. [2021-11-19 04:54:14,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-19 04:54:14,095 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:14,095 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:14,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2021-11-19 04:54:14,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-11-19 04:54:14,296 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:54:14,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:14,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1271243308, now seen corresponding path program 125 times [2021-11-19 04:54:14,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:14,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904089760] [2021-11-19 04:54:14,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:14,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:14,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:14,421 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-19 04:54:14,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:14,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904089760] [2021-11-19 04:54:14,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904089760] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:54:14,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066144910] [2021-11-19 04:54:14,422 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 04:54:14,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:54:14,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:54:14,424 INFO L229 MonitoredProcess]: Starting monitored process 129 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:54:14,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-11-19 04:54:14,476 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-19 04:54:14,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:54:14,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 04:54:14,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:54:14,674 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-19 04:54:14,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:54:14,771 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-19 04:54:14,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066144910] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:54:14,772 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:54:14,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2021-11-19 04:54:14,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217632114] [2021-11-19 04:54:14,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:54:14,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-19 04:54:14,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:14,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-19 04:54:14,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=531, Unknown=0, NotChecked=0, Total=812 [2021-11-19 04:54:14,773 INFO L87 Difference]: Start difference. First operand 1481 states and 1595 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:54:16,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:16,603 INFO L93 Difference]: Finished difference Result 1752 states and 1886 transitions. [2021-11-19 04:54:16,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-19 04:54:16,604 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 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 51 [2021-11-19 04:54:16,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:16,605 INFO L225 Difference]: With dead ends: 1752 [2021-11-19 04:54:16,605 INFO L226 Difference]: Without dead ends: 1536 [2021-11-19 04:54:16,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1053 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1093, Invalid=2099, Unknown=0, NotChecked=0, Total=3192 [2021-11-19 04:54:16,606 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 247 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:16,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 757 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:54:16,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1536 states. [2021-11-19 04:54:17,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1536 to 1467. [2021-11-19 04:54:17,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1467 states, 1466 states have (on average 1.0757162346521145) internal successors, (1577), 1466 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:54:17,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1467 states to 1467 states and 1577 transitions. [2021-11-19 04:54:17,729 INFO L78 Accepts]: Start accepts. Automaton has 1467 states and 1577 transitions. Word has length 51 [2021-11-19 04:54:17,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:17,729 INFO L470 AbstractCegarLoop]: Abstraction has 1467 states and 1577 transitions. [2021-11-19 04:54:17,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:54:17,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1467 states and 1577 transitions. [2021-11-19 04:54:17,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-19 04:54:17,730 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:17,730 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:17,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2021-11-19 04:54:17,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-11-19 04:54:17,931 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:54:17,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:17,932 INFO L85 PathProgramCache]: Analyzing trace with hash 107254485, now seen corresponding path program 126 times [2021-11-19 04:54:17,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:17,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711694004] [2021-11-19 04:54:17,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:17,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:17,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:18,076 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-19 04:54:18,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:18,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711694004] [2021-11-19 04:54:18,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711694004] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:54:18,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465845163] [2021-11-19 04:54:18,077 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 04:54:18,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:54:18,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:54:18,077 INFO L229 MonitoredProcess]: Starting monitored process 130 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:54:18,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-11-19 04:54:18,133 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-19 04:54:18,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:54:18,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 04:54:18,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:54:18,348 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-19 04:54:18,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:54:18,445 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-19 04:54:18,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465845163] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:54:18,446 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:54:18,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2021-11-19 04:54:18,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530298951] [2021-11-19 04:54:18,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:54:18,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-19 04:54:18,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:18,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-19 04:54:18,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=531, Unknown=0, NotChecked=0, Total=812 [2021-11-19 04:54:18,447 INFO L87 Difference]: Start difference. First operand 1467 states and 1577 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:54:20,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:20,291 INFO L93 Difference]: Finished difference Result 1543 states and 1646 transitions. [2021-11-19 04:54:20,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-19 04:54:20,291 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 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 51 [2021-11-19 04:54:20,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:20,292 INFO L225 Difference]: With dead ends: 1543 [2021-11-19 04:54:20,292 INFO L226 Difference]: Without dead ends: 1537 [2021-11-19 04:54:20,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1053 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1093, Invalid=2099, Unknown=0, NotChecked=0, Total=3192 [2021-11-19 04:54:20,293 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 98 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:20,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 564 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:54:20,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1537 states. [2021-11-19 04:54:21,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1537 to 1468. [2021-11-19 04:54:21,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1468 states, 1467 states have (on average 1.0756646216768917) internal successors, (1578), 1467 states have internal predecessors, (1578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:54:21,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 1578 transitions. [2021-11-19 04:54:21,193 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 1578 transitions. Word has length 51 [2021-11-19 04:54:21,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:21,193 INFO L470 AbstractCegarLoop]: Abstraction has 1468 states and 1578 transitions. [2021-11-19 04:54:21,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:54:21,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 1578 transitions. [2021-11-19 04:54:21,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-19 04:54:21,195 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:21,195 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:21,227 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2021-11-19 04:54:21,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-11-19 04:54:21,410 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:54:21,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:21,410 INFO L85 PathProgramCache]: Analyzing trace with hash -360556880, now seen corresponding path program 127 times [2021-11-19 04:54:21,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:21,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803709158] [2021-11-19 04:54:21,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:21,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:21,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:22,245 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:54:22,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:22,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803709158] [2021-11-19 04:54:22,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803709158] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:54:22,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458010389] [2021-11-19 04:54:22,246 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 04:54:22,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:54:22,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:54:22,247 INFO L229 MonitoredProcess]: Starting monitored process 131 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:54:22,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2021-11-19 04:54:22,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:22,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 83 conjunts are in the unsatisfiable core [2021-11-19 04:54:22,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:54:23,303 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:54:23,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:54:23,709 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:54:23,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458010389] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:54:23,709 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:54:23,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 65 [2021-11-19 04:54:23,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979970869] [2021-11-19 04:54:23,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:54:23,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-19 04:54:23,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:23,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-19 04:54:23,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=4005, Unknown=0, NotChecked=0, Total=4160 [2021-11-19 04:54:23,711 INFO L87 Difference]: Start difference. First operand 1468 states and 1578 transitions. Second operand has 65 states, 65 states have (on average 1.2923076923076924) internal successors, (84), 65 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:54:30,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:30,508 INFO L93 Difference]: Finished difference Result 2610 states and 2737 transitions. [2021-11-19 04:54:30,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-19 04:54:30,509 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.2923076923076924) internal successors, (84), 65 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-19 04:54:30,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:30,511 INFO L225 Difference]: With dead ends: 2610 [2021-11-19 04:54:30,511 INFO L226 Difference]: Without dead ends: 2601 [2021-11-19 04:54:30,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 76 SyntacticMatches, 5 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2005 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=454, Invalid=10676, Unknown=0, NotChecked=0, Total=11130 [2021-11-19 04:54:30,512 INFO L933 BasicCegarLoop]: 253 mSDtfsCounter, 411 mSDsluCounter, 11374 mSDsCounter, 0 mSdLazyCounter, 4910 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 11627 SdHoareTripleChecker+Invalid, 4974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 4910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:30,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [411 Valid, 11627 Invalid, 4974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 4910 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-19 04:54:30,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2021-11-19 04:54:31,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 1477. [2021-11-19 04:54:31,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1476 states have (on average 1.075880758807588) internal successors, (1588), 1476 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:54:31,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 1588 transitions. [2021-11-19 04:54:31,692 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 1588 transitions. Word has length 52 [2021-11-19 04:54:31,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:31,692 INFO L470 AbstractCegarLoop]: Abstraction has 1477 states and 1588 transitions. [2021-11-19 04:54:31,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.2923076923076924) internal successors, (84), 65 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:54:31,692 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 1588 transitions. [2021-11-19 04:54:31,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-19 04:54:31,694 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:31,694 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:31,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2021-11-19 04:54:31,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-11-19 04:54:31,895 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:54:31,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:31,895 INFO L85 PathProgramCache]: Analyzing trace with hash -859611408, now seen corresponding path program 128 times [2021-11-19 04:54:31,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:31,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396358661] [2021-11-19 04:54:31,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:31,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:31,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:33,011 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 188 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:54:33,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:33,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396358661] [2021-11-19 04:54:33,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396358661] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:54:33,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995127017] [2021-11-19 04:54:33,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:54:33,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:54:33,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:54:33,013 INFO L229 MonitoredProcess]: Starting monitored process 132 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:54:33,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2021-11-19 04:54:33,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:54:33,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:54:33,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 79 conjunts are in the unsatisfiable core [2021-11-19 04:54:33,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:54:34,233 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 188 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:54:34,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:54:34,651 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 188 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:54:34,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995127017] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:54:34,652 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:54:34,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 63 [2021-11-19 04:54:34,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805553417] [2021-11-19 04:54:34,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:54:34,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-19 04:54:34,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:34,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-19 04:54:34,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=3752, Unknown=0, NotChecked=0, Total=3906 [2021-11-19 04:54:34,654 INFO L87 Difference]: Start difference. First operand 1477 states and 1588 transitions. Second operand has 63 states, 63 states have (on average 1.3174603174603174) internal successors, (83), 63 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:54:40,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:40,650 INFO L93 Difference]: Finished difference Result 2301 states and 2411 transitions. [2021-11-19 04:54:40,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-19 04:54:40,651 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.3174603174603174) internal successors, (83), 63 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-19 04:54:40,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:40,652 INFO L225 Difference]: With dead ends: 2301 [2021-11-19 04:54:40,652 INFO L226 Difference]: Without dead ends: 2268 [2021-11-19 04:54:40,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 74 SyntacticMatches, 7 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1822 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=421, Invalid=9679, Unknown=0, NotChecked=0, Total=10100 [2021-11-19 04:54:40,653 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 321 mSDsluCounter, 9137 mSDsCounter, 0 mSdLazyCounter, 4017 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 9362 SdHoareTripleChecker+Invalid, 4077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 4017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:40,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 9362 Invalid, 4077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 4017 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-19 04:54:40,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2268 states. [2021-11-19 04:54:41,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2268 to 1468. [2021-11-19 04:54:41,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1468 states, 1467 states have (on average 1.0756646216768917) internal successors, (1578), 1467 states have internal predecessors, (1578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:54:41,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 1578 transitions. [2021-11-19 04:54:41,672 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 1578 transitions. Word has length 52 [2021-11-19 04:54:41,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:41,672 INFO L470 AbstractCegarLoop]: Abstraction has 1468 states and 1578 transitions. [2021-11-19 04:54:41,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.3174603174603174) internal successors, (83), 63 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:54:41,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 1578 transitions. [2021-11-19 04:54:41,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-19 04:54:41,674 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:41,674 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:41,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2021-11-19 04:54:41,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-11-19 04:54:41,875 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:54:41,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:41,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1996745040, now seen corresponding path program 129 times [2021-11-19 04:54:41,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:41,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730327305] [2021-11-19 04:54:41,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:41,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:41,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:42,585 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 04:54:42,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:42,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730327305] [2021-11-19 04:54:42,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730327305] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:54:42,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270314247] [2021-11-19 04:54:42,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:54:42,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:54:42,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:54:42,586 INFO L229 MonitoredProcess]: Starting monitored process 133 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:54:42,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2021-11-19 04:54:42,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-19 04:54:42,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:54:42,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 75 conjunts are in the unsatisfiable core [2021-11-19 04:54:42,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:54:43,719 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 04:54:43,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:54:44,184 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 04:54:44,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270314247] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:54:44,185 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:54:44,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 61 [2021-11-19 04:54:44,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970235524] [2021-11-19 04:54:44,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:54:44,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-19 04:54:44,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:44,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-19 04:54:44,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=3507, Unknown=0, NotChecked=0, Total=3660 [2021-11-19 04:54:44,186 INFO L87 Difference]: Start difference. First operand 1468 states and 1578 transitions. Second operand has 61 states, 61 states have (on average 1.3278688524590163) internal successors, (81), 61 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:54:49,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:49,606 INFO L93 Difference]: Finished difference Result 2058 states and 2167 transitions. [2021-11-19 04:54:49,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-19 04:54:49,606 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.3278688524590163) internal successors, (81), 61 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-19 04:54:49,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:49,607 INFO L225 Difference]: With dead ends: 2058 [2021-11-19 04:54:49,607 INFO L226 Difference]: Without dead ends: 2024 [2021-11-19 04:54:49,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 74 SyntacticMatches, 7 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1702 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=415, Invalid=8897, Unknown=0, NotChecked=0, Total=9312 [2021-11-19 04:54:49,608 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 285 mSDsluCounter, 7311 mSDsCounter, 0 mSdLazyCounter, 3547 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 7502 SdHoareTripleChecker+Invalid, 3610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 3547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:49,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 7502 Invalid, 3610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 3547 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-19 04:54:49,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2024 states. [2021-11-19 04:54:50,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2024 to 1457. [2021-11-19 04:54:50,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1457 states, 1456 states have (on average 1.0755494505494505) internal successors, (1566), 1456 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:54:50,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1457 states to 1457 states and 1566 transitions. [2021-11-19 04:54:50,584 INFO L78 Accepts]: Start accepts. Automaton has 1457 states and 1566 transitions. Word has length 52 [2021-11-19 04:54:50,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:50,584 INFO L470 AbstractCegarLoop]: Abstraction has 1457 states and 1566 transitions. [2021-11-19 04:54:50,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.3278688524590163) internal successors, (81), 61 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:54:50,584 INFO L276 IsEmpty]: Start isEmpty. Operand 1457 states and 1566 transitions. [2021-11-19 04:54:50,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-19 04:54:50,586 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:50,586 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:50,612 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2021-11-19 04:54:50,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-11-19 04:54:50,790 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:54:50,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:50,791 INFO L85 PathProgramCache]: Analyzing trace with hash -209019152, now seen corresponding path program 130 times [2021-11-19 04:54:50,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:50,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626461560] [2021-11-19 04:54:50,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:50,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:50,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:51,529 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 04:54:51,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:51,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626461560] [2021-11-19 04:54:51,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626461560] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:54:51,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825066622] [2021-11-19 04:54:51,529 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 04:54:51,529 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:54:51,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:54:51,530 INFO L229 MonitoredProcess]: Starting monitored process 134 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:54:51,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2021-11-19 04:54:51,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 04:54:51,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:54:51,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-19 04:54:51,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:54:52,588 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 04:54:52,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:54:53,098 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 04:54:53,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825066622] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:54:53,099 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:54:53,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 59 [2021-11-19 04:54:53,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030705307] [2021-11-19 04:54:53,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:54:53,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-19 04:54:53,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:53,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-19 04:54:53,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=3270, Unknown=0, NotChecked=0, Total=3422 [2021-11-19 04:54:53,100 INFO L87 Difference]: Start difference. First operand 1457 states and 1566 transitions. Second operand has 59 states, 59 states have (on average 1.3389830508474576) internal successors, (79), 59 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:54:57,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:57,844 INFO L93 Difference]: Finished difference Result 1864 states and 1972 transitions. [2021-11-19 04:54:57,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-19 04:54:57,844 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.3389830508474576) internal successors, (79), 59 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-19 04:54:57,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:57,846 INFO L225 Difference]: With dead ends: 1864 [2021-11-19 04:54:57,846 INFO L226 Difference]: Without dead ends: 1829 [2021-11-19 04:54:57,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 74 SyntacticMatches, 7 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1586 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=409, Invalid=8147, Unknown=0, NotChecked=0, Total=8556 [2021-11-19 04:54:57,847 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 243 mSDsluCounter, 5110 mSDsCounter, 0 mSdLazyCounter, 2647 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 5267 SdHoareTripleChecker+Invalid, 2710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 2647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:57,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 5267 Invalid, 2710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 2647 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 04:54:57,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1829 states. [2021-11-19 04:54:58,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1829 to 1444. [2021-11-19 04:54:58,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1444 states, 1443 states have (on average 1.0755370755370754) internal successors, (1552), 1443 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:54:58,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 1552 transitions. [2021-11-19 04:54:58,856 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 1552 transitions. Word has length 52 [2021-11-19 04:54:58,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:58,856 INFO L470 AbstractCegarLoop]: Abstraction has 1444 states and 1552 transitions. [2021-11-19 04:54:58,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.3389830508474576) internal successors, (79), 59 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:54:58,856 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 1552 transitions. [2021-11-19 04:54:58,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-19 04:54:58,858 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:58,858 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:58,890 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2021-11-19 04:54:59,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,134 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:54:59,074 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:54:59,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:59,074 INFO L85 PathProgramCache]: Analyzing trace with hash -537667920, now seen corresponding path program 131 times [2021-11-19 04:54:59,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:59,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292645478] [2021-11-19 04:54:59,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:59,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:59,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:59,680 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 04:54:59,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:59,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292645478] [2021-11-19 04:54:59,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292645478] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:54:59,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610907910] [2021-11-19 04:54:59,680 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 04:54:59,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:54:59,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:54:59,681 INFO L229 MonitoredProcess]: Starting monitored process 135 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:54:59,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2021-11-19 04:54:59,730 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-19 04:54:59,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:54:59,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-19 04:54:59,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:55:00,730 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 04:55:00,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:55:01,170 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 04:55:01,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610907910] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:55:01,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:55:01,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 57 [2021-11-19 04:55:01,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838912871] [2021-11-19 04:55:01,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:55:01,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-19 04:55:01,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:55:01,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-19 04:55:01,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=3041, Unknown=0, NotChecked=0, Total=3192 [2021-11-19 04:55:01,172 INFO L87 Difference]: Start difference. First operand 1444 states and 1552 transitions. Second operand has 57 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 57 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:55:05,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:55:05,253 INFO L93 Difference]: Finished difference Result 1711 states and 1818 transitions. [2021-11-19 04:55:05,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-19 04:55:05,253 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 57 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-19 04:55:05,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:55:05,254 INFO L225 Difference]: With dead ends: 1711 [2021-11-19 04:55:05,255 INFO L226 Difference]: Without dead ends: 1675 [2021-11-19 04:55:05,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 74 SyntacticMatches, 7 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1474 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=403, Invalid=7429, Unknown=0, NotChecked=0, Total=7832 [2021-11-19 04:55:05,256 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 195 mSDsluCounter, 4316 mSDsCounter, 0 mSdLazyCounter, 2634 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 4439 SdHoareTripleChecker+Invalid, 2691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 2634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:55:05,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 4439 Invalid, 2691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 2634 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 04:55:05,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1675 states. [2021-11-19 04:55:06,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1675 to 1429. [2021-11-19 04:55:06,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1429 states, 1428 states have (on average 1.0756302521008403) internal successors, (1536), 1428 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:55:06,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 1536 transitions. [2021-11-19 04:55:06,299 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 1536 transitions. Word has length 52 [2021-11-19 04:55:06,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:55:06,299 INFO L470 AbstractCegarLoop]: Abstraction has 1429 states and 1536 transitions. [2021-11-19 04:55:06,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 57 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:55:06,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 1536 transitions. [2021-11-19 04:55:06,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-19 04:55:06,301 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:55:06,301 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:55:06,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2021-11-19 04:55:06,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,135 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:55:06,514 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:55:06,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:55:06,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1607720688, now seen corresponding path program 132 times [2021-11-19 04:55:06,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:55:06,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368221064] [2021-11-19 04:55:06,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:55:06,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:55:06,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:07,059 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 04:55:07,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:55:07,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368221064] [2021-11-19 04:55:07,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368221064] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:55:07,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498353968] [2021-11-19 04:55:07,059 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 04:55:07,059 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:55:07,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:55:07,060 INFO L229 MonitoredProcess]: Starting monitored process 136 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:55:07,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2021-11-19 04:55:07,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-19 04:55:07,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:55:07,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-19 04:55:07,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:55:08,181 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 04:55:08,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:55:08,618 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 04:55:08,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498353968] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:55:08,619 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:55:08,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 55 [2021-11-19 04:55:08,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944564427] [2021-11-19 04:55:08,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:55:08,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-19 04:55:08,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:55:08,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-19 04:55:08,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2820, Unknown=0, NotChecked=0, Total=2970 [2021-11-19 04:55:08,620 INFO L87 Difference]: Start difference. First operand 1429 states and 1536 transitions. Second operand has 55 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 55 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:55:12,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:55:12,110 INFO L93 Difference]: Finished difference Result 1591 states and 1697 transitions. [2021-11-19 04:55:12,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-19 04:55:12,110 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 55 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-19 04:55:12,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:55:12,112 INFO L225 Difference]: With dead ends: 1591 [2021-11-19 04:55:12,112 INFO L226 Difference]: Without dead ends: 1554 [2021-11-19 04:55:12,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 74 SyntacticMatches, 7 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1366 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=397, Invalid=6743, Unknown=0, NotChecked=0, Total=7140 [2021-11-19 04:55:12,113 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 158 mSDsluCounter, 2985 mSDsCounter, 0 mSdLazyCounter, 2033 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 3074 SdHoareTripleChecker+Invalid, 2094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 2033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 04:55:12,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 3074 Invalid, 2094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 2033 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 04:55:12,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2021-11-19 04:55:13,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1412. [2021-11-19 04:55:13,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1411 states have (on average 1.0758327427356484) internal successors, (1518), 1411 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:55:13,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 1518 transitions. [2021-11-19 04:55:13,206 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 1518 transitions. Word has length 52 [2021-11-19 04:55:13,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:55:13,206 INFO L470 AbstractCegarLoop]: Abstraction has 1412 states and 1518 transitions. [2021-11-19 04:55:13,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 55 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:55:13,207 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 1518 transitions. [2021-11-19 04:55:13,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-19 04:55:13,208 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:55:13,208 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:55:13,232 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2021-11-19 04:55:13,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,136 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:55:13,408 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:55:13,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:55:13,409 INFO L85 PathProgramCache]: Analyzing trace with hash -345401680, now seen corresponding path program 133 times [2021-11-19 04:55:13,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:55:13,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768482426] [2021-11-19 04:55:13,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:55:13,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:55:13,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:13,962 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 04:55:13,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:55:13,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768482426] [2021-11-19 04:55:13,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768482426] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:55:13,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883567082] [2021-11-19 04:55:13,963 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 04:55:13,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:55:13,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:55:13,964 INFO L229 MonitoredProcess]: Starting monitored process 137 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:55:13,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2021-11-19 04:55:14,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:14,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-19 04:55:14,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:55:14,990 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 04:55:14,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:55:15,348 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 04:55:15,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883567082] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:55:15,348 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:55:15,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 53 [2021-11-19 04:55:15,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627125451] [2021-11-19 04:55:15,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:55:15,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-19 04:55:15,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:55:15,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-19 04:55:15,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2607, Unknown=0, NotChecked=0, Total=2756 [2021-11-19 04:55:15,349 INFO L87 Difference]: Start difference. First operand 1412 states and 1518 transitions. Second operand has 53 states, 53 states have (on average 1.3773584905660377) internal successors, (73), 53 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:55:17,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:55:17,874 INFO L93 Difference]: Finished difference Result 1488 states and 1593 transitions. [2021-11-19 04:55:17,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-19 04:55:17,875 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.3773584905660377) internal successors, (73), 53 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-19 04:55:17,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:55:17,876 INFO L225 Difference]: With dead ends: 1488 [2021-11-19 04:55:17,876 INFO L226 Difference]: Without dead ends: 1450 [2021-11-19 04:55:17,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 74 SyntacticMatches, 7 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=391, Invalid=6089, Unknown=0, NotChecked=0, Total=6480 [2021-11-19 04:55:17,877 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 113 mSDsluCounter, 1684 mSDsCounter, 0 mSdLazyCounter, 1384 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 1739 SdHoareTripleChecker+Invalid, 1443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:55:17,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 1739 Invalid, 1443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1384 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 04:55:17,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1450 states. [2021-11-19 04:55:18,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1450 to 1393. [2021-11-19 04:55:18,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1393 states, 1392 states have (on average 1.0761494252873562) internal successors, (1498), 1392 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:55:18,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 1498 transitions. [2021-11-19 04:55:18,754 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 1498 transitions. Word has length 52 [2021-11-19 04:55:18,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:55:18,755 INFO L470 AbstractCegarLoop]: Abstraction has 1393 states and 1498 transitions. [2021-11-19 04:55:18,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.3773584905660377) internal successors, (73), 53 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:55:18,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 1498 transitions. [2021-11-19 04:55:18,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-19 04:55:18,756 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:55:18,756 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:55:18,778 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2021-11-19 04:55:18,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,137 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:55:18,957 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:55:18,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:55:18,957 INFO L85 PathProgramCache]: Analyzing trace with hash 631185136, now seen corresponding path program 134 times [2021-11-19 04:55:18,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:55:18,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033213502] [2021-11-19 04:55:18,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:55:18,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:55:18,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:19,395 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-19 04:55:19,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:55:19,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033213502] [2021-11-19 04:55:19,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033213502] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:55:19,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103904037] [2021-11-19 04:55:19,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:55:19,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:55:19,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:55:19,410 INFO L229 MonitoredProcess]: Starting monitored process 138 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:55:19,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2021-11-19 04:55:19,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:55:19,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:55:19,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-19 04:55:19,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:55:20,551 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-19 04:55:20,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:55:20,914 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-19 04:55:20,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103904037] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:55:20,914 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:55:20,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 51 [2021-11-19 04:55:20,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107054603] [2021-11-19 04:55:20,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:55:20,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-19 04:55:20,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:55:20,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-19 04:55:20,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2402, Unknown=0, NotChecked=0, Total=2550 [2021-11-19 04:55:20,915 INFO L87 Difference]: Start difference. First operand 1393 states and 1498 transitions. Second operand has 51 states, 51 states have (on average 1.392156862745098) internal successors, (71), 51 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) [2021-11-19 04:55:23,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:55:23,103 INFO L93 Difference]: Finished difference Result 1448 states and 1555 transitions. [2021-11-19 04:55:23,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-19 04:55:23,103 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.392156862745098) internal successors, (71), 51 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) Word has length 52 [2021-11-19 04:55:23,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:55:23,104 INFO L225 Difference]: With dead ends: 1448 [2021-11-19 04:55:23,104 INFO L226 Difference]: Without dead ends: 1442 [2021-11-19 04:55:23,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 74 SyntacticMatches, 7 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1163 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=385, Invalid=5467, Unknown=0, NotChecked=0, Total=5852 [2021-11-19 04:55:23,105 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 110 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 1010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:55:23,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 712 Invalid, 1010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 952 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:55:23,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1442 states. [2021-11-19 04:55:24,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1442 to 1409. [2021-11-19 04:55:24,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1408 states have (on average 1.0767045454545454) internal successors, (1516), 1408 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:55:24,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 1516 transitions. [2021-11-19 04:55:24,086 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 1516 transitions. Word has length 52 [2021-11-19 04:55:24,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:55:24,086 INFO L470 AbstractCegarLoop]: Abstraction has 1409 states and 1516 transitions. [2021-11-19 04:55:24,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.392156862745098) internal successors, (71), 51 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) [2021-11-19 04:55:24,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 1516 transitions. [2021-11-19 04:55:24,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-19 04:55:24,087 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:55:24,087 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:55:24,111 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2021-11-19 04:55:24,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,138 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:55:24,288 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:55:24,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:55:24,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1924691242, now seen corresponding path program 135 times [2021-11-19 04:55:24,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:55:24,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937225737] [2021-11-19 04:55:24,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:55:24,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:55:24,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:24,918 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:55:24,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:55:24,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937225737] [2021-11-19 04:55:24,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937225737] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:55:24,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208350412] [2021-11-19 04:55:24,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:55:24,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:55:24,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:55:24,920 INFO L229 MonitoredProcess]: Starting monitored process 139 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:55:24,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2021-11-19 04:55:24,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-19 04:55:24,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:55:24,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-19 04:55:24,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:55:26,736 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:55:26,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:55:28,035 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:55:28,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208350412] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:55:28,036 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:55:28,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 84 [2021-11-19 04:55:28,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876076490] [2021-11-19 04:55:28,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:55:28,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-11-19 04:55:28,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:55:28,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-11-19 04:55:28,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=6739, Unknown=0, NotChecked=0, Total=6972 [2021-11-19 04:55:28,037 INFO L87 Difference]: Start difference. First operand 1409 states and 1516 transitions. Second operand has 84 states, 84 states have (on average 1.3571428571428572) internal successors, (114), 84 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:55:51,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:55:51,014 INFO L93 Difference]: Finished difference Result 2494 states and 2625 transitions. [2021-11-19 04:55:51,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 183 states. [2021-11-19 04:55:51,015 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.3571428571428572) internal successors, (114), 84 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-19 04:55:51,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:55:51,017 INFO L225 Difference]: With dead ends: 2494 [2021-11-19 04:55:51,017 INFO L226 Difference]: Without dead ends: 2432 [2021-11-19 04:55:51,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15385 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=13564, Invalid=55342, Unknown=0, NotChecked=0, Total=68906 [2021-11-19 04:55:51,020 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 6747 mSDsluCounter, 4306 mSDsCounter, 0 mSdLazyCounter, 3794 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6747 SdHoareTripleChecker+Valid, 4450 SdHoareTripleChecker+Invalid, 4095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 3794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:55:51,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6747 Valid, 4450 Invalid, 4095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 3794 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-19 04:55:51,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2432 states. [2021-11-19 04:55:52,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2432 to 1520. [2021-11-19 04:55:52,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1520 states, 1519 states have (on average 1.0763660302830809) internal successors, (1635), 1519 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:55:52,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1520 states to 1520 states and 1635 transitions. [2021-11-19 04:55:52,122 INFO L78 Accepts]: Start accepts. Automaton has 1520 states and 1635 transitions. Word has length 53 [2021-11-19 04:55:52,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:55:52,122 INFO L470 AbstractCegarLoop]: Abstraction has 1520 states and 1635 transitions. [2021-11-19 04:55:52,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.3571428571428572) internal successors, (114), 84 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:55:52,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1520 states and 1635 transitions. [2021-11-19 04:55:52,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-19 04:55:52,123 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:55:52,124 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:55:52,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2021-11-19 04:55:52,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-11-19 04:55:52,324 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:55:52,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:55:52,325 INFO L85 PathProgramCache]: Analyzing trace with hash 216239415, now seen corresponding path program 136 times [2021-11-19 04:55:52,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:55:52,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633202501] [2021-11-19 04:55:52,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:55:52,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:55:52,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:53,014 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:55:53,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:55:53,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633202501] [2021-11-19 04:55:53,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633202501] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:55:53,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430713650] [2021-11-19 04:55:53,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 04:55:53,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:55:53,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:55:53,015 INFO L229 MonitoredProcess]: Starting monitored process 140 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:55:53,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2021-11-19 04:55:53,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 04:55:53,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:55:53,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-19 04:55:53,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:55:55,116 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:55:55,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:55:56,366 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:55:56,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430713650] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:55:56,367 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:55:56,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 85 [2021-11-19 04:55:56,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315217295] [2021-11-19 04:55:56,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:55:56,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-11-19 04:55:56,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:55:56,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-11-19 04:55:56,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=6888, Unknown=0, NotChecked=0, Total=7140 [2021-11-19 04:55:56,369 INFO L87 Difference]: Start difference. First operand 1520 states and 1635 transitions. Second operand has 85 states, 85 states have (on average 1.3529411764705883) internal successors, (115), 85 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:56:07,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:56:07,060 INFO L93 Difference]: Finished difference Result 2471 states and 2594 transitions. [2021-11-19 04:56:07,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-19 04:56:07,060 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.3529411764705883) internal successors, (115), 85 states have internal predecessors, (115), 0 states have call successors, (0), 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 53 [2021-11-19 04:56:07,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:56:07,062 INFO L225 Difference]: With dead ends: 2471 [2021-11-19 04:56:07,062 INFO L226 Difference]: Without dead ends: 2440 [2021-11-19 04:56:07,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2236 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=1314, Invalid=15716, Unknown=0, NotChecked=0, Total=17030 [2021-11-19 04:56:07,064 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 4610 mSDsluCounter, 12845 mSDsCounter, 0 mSdLazyCounter, 4886 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4610 SdHoareTripleChecker+Valid, 13087 SdHoareTripleChecker+Invalid, 5057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 4886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:56:07,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4610 Valid, 13087 Invalid, 5057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 4886 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-19 04:56:07,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2440 states. [2021-11-19 04:56:08,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2440 to 1528. [2021-11-19 04:56:08,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1528 states, 1527 states have (on average 1.0759659462999345) internal successors, (1643), 1527 states have internal predecessors, (1643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:56:08,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1528 states to 1528 states and 1643 transitions. [2021-11-19 04:56:08,186 INFO L78 Accepts]: Start accepts. Automaton has 1528 states and 1643 transitions. Word has length 53 [2021-11-19 04:56:08,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:56:08,186 INFO L470 AbstractCegarLoop]: Abstraction has 1528 states and 1643 transitions. [2021-11-19 04:56:08,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.3529411764705883) internal successors, (115), 85 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:56:08,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1528 states and 1643 transitions. [2021-11-19 04:56:08,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-19 04:56:08,188 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:56:08,188 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:56:08,211 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2021-11-19 04:56:08,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-11-19 04:56:08,388 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:56:08,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:56:08,389 INFO L85 PathProgramCache]: Analyzing trace with hash -306833867, now seen corresponding path program 137 times [2021-11-19 04:56:08,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:56:08,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661610279] [2021-11-19 04:56:08,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:56:08,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:56:08,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:08,546 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 37 proven. 44 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-19 04:56:08,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:56:08,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661610279] [2021-11-19 04:56:08,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661610279] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:56:08,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224887977] [2021-11-19 04:56:08,547 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 04:56:08,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:56:08,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:56:08,548 INFO L229 MonitoredProcess]: Starting monitored process 141 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:56:08,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2021-11-19 04:56:08,606 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-19 04:56:08,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:56:08,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 04:56:08,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:56:08,866 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-19 04:56:08,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:56:08,962 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-19 04:56:08,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224887977] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:56:08,962 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:56:08,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 31 [2021-11-19 04:56:08,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478272228] [2021-11-19 04:56:08,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:56:08,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-19 04:56:08,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:56:08,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-19 04:56:08,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=697, Unknown=0, NotChecked=0, Total=930 [2021-11-19 04:56:08,964 INFO L87 Difference]: Start difference. First operand 1528 states and 1643 transitions. Second operand has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:56:11,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:56:11,392 INFO L93 Difference]: Finished difference Result 1682 states and 1808 transitions. [2021-11-19 04:56:11,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-19 04:56:11,393 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 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 53 [2021-11-19 04:56:11,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:56:11,394 INFO L225 Difference]: With dead ends: 1682 [2021-11-19 04:56:11,394 INFO L226 Difference]: Without dead ends: 1663 [2021-11-19 04:56:11,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1010, Invalid=3280, Unknown=0, NotChecked=0, Total=4290 [2021-11-19 04:56:11,395 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 431 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:56:11,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 481 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:56:11,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1663 states. [2021-11-19 04:56:12,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1663 to 1580. [2021-11-19 04:56:12,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1579 states have (on average 1.0842305256491451) internal successors, (1712), 1579 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:56:12,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 1712 transitions. [2021-11-19 04:56:12,550 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 1712 transitions. Word has length 53 [2021-11-19 04:56:12,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:56:12,551 INFO L470 AbstractCegarLoop]: Abstraction has 1580 states and 1712 transitions. [2021-11-19 04:56:12,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:56:12,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 1712 transitions. [2021-11-19 04:56:12,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-19 04:56:12,552 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:56:12,552 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:56:12,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2021-11-19 04:56:12,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-11-19 04:56:12,753 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:56:12,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:56:12,753 INFO L85 PathProgramCache]: Analyzing trace with hash -523075244, now seen corresponding path program 138 times [2021-11-19 04:56:12,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:56:12,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993946980] [2021-11-19 04:56:12,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:56:12,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:56:12,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:12,894 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 37 proven. 44 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-19 04:56:12,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:56:12,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993946980] [2021-11-19 04:56:12,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993946980] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:56:12,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792525453] [2021-11-19 04:56:12,895 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 04:56:12,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:56:12,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:56:12,896 INFO L229 MonitoredProcess]: Starting monitored process 142 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:56:12,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2021-11-19 04:56:12,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-19 04:56:12,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:56:12,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 04:56:12,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:56:13,194 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-19 04:56:13,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:56:13,296 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-19 04:56:13,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792525453] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:56:13,296 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:56:13,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 31 [2021-11-19 04:56:13,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452899055] [2021-11-19 04:56:13,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:56:13,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-19 04:56:13,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:56:13,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-19 04:56:13,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=697, Unknown=0, NotChecked=0, Total=930 [2021-11-19 04:56:13,297 INFO L87 Difference]: Start difference. First operand 1580 states and 1712 transitions. Second operand has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:56:16,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:56:16,315 INFO L93 Difference]: Finished difference Result 2423 states and 2664 transitions. [2021-11-19 04:56:16,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-19 04:56:16,315 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 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 53 [2021-11-19 04:56:16,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:56:16,317 INFO L225 Difference]: With dead ends: 2423 [2021-11-19 04:56:16,317 INFO L226 Difference]: Without dead ends: 2123 [2021-11-19 04:56:16,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1010, Invalid=3280, Unknown=0, NotChecked=0, Total=4290 [2021-11-19 04:56:16,318 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 804 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 899 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:56:16,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [804 Valid, 899 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:56:16,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2021-11-19 04:56:17,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 1758. [2021-11-19 04:56:17,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1758 states, 1757 states have (on average 1.085372794536141) internal successors, (1907), 1757 states have internal predecessors, (1907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:56:17,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1758 states to 1758 states and 1907 transitions. [2021-11-19 04:56:17,589 INFO L78 Accepts]: Start accepts. Automaton has 1758 states and 1907 transitions. Word has length 53 [2021-11-19 04:56:17,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:56:17,589 INFO L470 AbstractCegarLoop]: Abstraction has 1758 states and 1907 transitions. [2021-11-19 04:56:17,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:56:17,590 INFO L276 IsEmpty]: Start isEmpty. Operand 1758 states and 1907 transitions. [2021-11-19 04:56:17,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-19 04:56:17,591 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:56:17,591 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:56:17,613 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2021-11-19 04:56:17,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-11-19 04:56:17,792 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:56:17,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:56:17,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1223875281, now seen corresponding path program 139 times [2021-11-19 04:56:17,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:56:17,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338509065] [2021-11-19 04:56:17,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:56:17,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:56:17,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:18,854 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 274 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:56:18,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:56:18,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338509065] [2021-11-19 04:56:18,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338509065] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:56:18,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005259909] [2021-11-19 04:56:18,854 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 04:56:18,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:56:18,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:56:18,856 INFO L229 MonitoredProcess]: Starting monitored process 143 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:56:18,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2021-11-19 04:56:18,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:18,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 87 conjunts are in the unsatisfiable core [2021-11-19 04:56:18,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:56:20,238 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 274 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:56:20,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:56:20,758 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 274 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:56:20,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005259909] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:56:20,758 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:56:20,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 68 [2021-11-19 04:56:20,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359530653] [2021-11-19 04:56:20,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:56:20,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-19 04:56:20,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:56:20,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-19 04:56:20,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=4394, Unknown=0, NotChecked=0, Total=4556 [2021-11-19 04:56:20,759 INFO L87 Difference]: Start difference. First operand 1758 states and 1907 transitions. Second operand has 68 states, 68 states have (on average 1.2794117647058822) internal successors, (87), 68 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:56:30,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:56:30,393 INFO L93 Difference]: Finished difference Result 3179 states and 3348 transitions. [2021-11-19 04:56:30,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-19 04:56:30,394 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.2794117647058822) internal successors, (87), 68 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-19 04:56:30,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:56:30,396 INFO L225 Difference]: With dead ends: 3179 [2021-11-19 04:56:30,396 INFO L226 Difference]: Without dead ends: 3170 [2021-11-19 04:56:30,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 79 SyntacticMatches, 5 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2201 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=473, Invalid=11737, Unknown=0, NotChecked=0, Total=12210 [2021-11-19 04:56:30,397 INFO L933 BasicCegarLoop]: 270 mSDtfsCounter, 431 mSDsluCounter, 12530 mSDsCounter, 0 mSdLazyCounter, 5497 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 12800 SdHoareTripleChecker+Invalid, 5563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 5497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:56:30,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 12800 Invalid, 5563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 5497 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-19 04:56:30,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3170 states. [2021-11-19 04:56:31,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3170 to 1767. [2021-11-19 04:56:31,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1767 states, 1766 states have (on average 1.0855039637599093) internal successors, (1917), 1766 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:56:31,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1767 states to 1767 states and 1917 transitions. [2021-11-19 04:56:31,724 INFO L78 Accepts]: Start accepts. Automaton has 1767 states and 1917 transitions. Word has length 54 [2021-11-19 04:56:31,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:56:31,724 INFO L470 AbstractCegarLoop]: Abstraction has 1767 states and 1917 transitions. [2021-11-19 04:56:31,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.2794117647058822) internal successors, (87), 68 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:56:31,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1767 states and 1917 transitions. [2021-11-19 04:56:31,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-19 04:56:31,726 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:56:31,726 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:56:31,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2021-11-19 04:56:31,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,143 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:56:31,926 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:56:31,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:56:31,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1746257615, now seen corresponding path program 140 times [2021-11-19 04:56:31,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:56:31,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337817240] [2021-11-19 04:56:31,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:56:31,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:56:31,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:32,864 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:56:32,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:56:32,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337817240] [2021-11-19 04:56:32,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337817240] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:56:32,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939411028] [2021-11-19 04:56:32,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:56:32,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:56:32,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:56:32,865 INFO L229 MonitoredProcess]: Starting monitored process 144 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:56:32,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2021-11-19 04:56:32,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:56:32,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:56:32,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 83 conjunts are in the unsatisfiable core [2021-11-19 04:56:32,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:56:34,080 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:56:34,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:56:34,576 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:56:34,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939411028] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:56:34,576 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:56:34,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 66 [2021-11-19 04:56:34,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689567742] [2021-11-19 04:56:34,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:56:34,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-19 04:56:34,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:56:34,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-19 04:56:34,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=4129, Unknown=0, NotChecked=0, Total=4290 [2021-11-19 04:56:34,577 INFO L87 Difference]: Start difference. First operand 1767 states and 1917 transitions. Second operand has 66 states, 66 states have (on average 1.303030303030303) internal successors, (86), 66 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:56:42,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:56:42,746 INFO L93 Difference]: Finished difference Result 2829 states and 2978 transitions. [2021-11-19 04:56:42,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-11-19 04:56:42,748 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.303030303030303) internal successors, (86), 66 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-19 04:56:42,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:56:42,751 INFO L225 Difference]: With dead ends: 2829 [2021-11-19 04:56:42,751 INFO L226 Difference]: Without dead ends: 2795 [2021-11-19 04:56:42,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 77 SyntacticMatches, 7 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2009 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=439, Invalid=10691, Unknown=0, NotChecked=0, Total=11130 [2021-11-19 04:56:42,752 INFO L933 BasicCegarLoop]: 238 mSDtfsCounter, 348 mSDsluCounter, 9943 mSDsCounter, 0 mSdLazyCounter, 4504 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 10181 SdHoareTripleChecker+Invalid, 4569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 4504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-19 04:56:42,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 10181 Invalid, 4569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 4504 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-19 04:56:42,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2795 states. [2021-11-19 04:56:44,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2795 to 1758. [2021-11-19 04:56:44,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1758 states, 1757 states have (on average 1.085372794536141) internal successors, (1907), 1757 states have internal predecessors, (1907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:56:44,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1758 states to 1758 states and 1907 transitions. [2021-11-19 04:56:44,072 INFO L78 Accepts]: Start accepts. Automaton has 1758 states and 1907 transitions. Word has length 54 [2021-11-19 04:56:44,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:56:44,072 INFO L470 AbstractCegarLoop]: Abstraction has 1758 states and 1907 transitions. [2021-11-19 04:56:44,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.303030303030303) internal successors, (86), 66 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:56:44,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1758 states and 1907 transitions. [2021-11-19 04:56:44,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-19 04:56:44,073 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:56:44,073 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:56:44,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2021-11-19 04:56:44,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-11-19 04:56:44,274 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:56:44,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:56:44,274 INFO L85 PathProgramCache]: Analyzing trace with hash -2010842961, now seen corresponding path program 141 times [2021-11-19 04:56:44,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:56:44,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034609741] [2021-11-19 04:56:44,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:56:44,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:56:44,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:45,089 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 04:56:45,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:56:45,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034609741] [2021-11-19 04:56:45,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034609741] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:56:45,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040391383] [2021-11-19 04:56:45,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:56:45,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:56:45,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:56:45,091 INFO L229 MonitoredProcess]: Starting monitored process 145 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:56:45,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2021-11-19 04:56:45,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-19 04:56:45,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:56:45,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 79 conjunts are in the unsatisfiable core [2021-11-19 04:56:45,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:56:46,277 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 04:56:46,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:56:46,722 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 04:56:46,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040391383] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:56:46,722 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:56:46,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 64 [2021-11-19 04:56:46,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146368554] [2021-11-19 04:56:46,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:56:46,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-19 04:56:46,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:56:46,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-19 04:56:46,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=3872, Unknown=0, NotChecked=0, Total=4032 [2021-11-19 04:56:46,723 INFO L87 Difference]: Start difference. First operand 1758 states and 1907 transitions. Second operand has 64 states, 64 states have (on average 1.3125) internal successors, (84), 64 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:56:54,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:56:54,293 INFO L93 Difference]: Finished difference Result 2540 states and 2688 transitions. [2021-11-19 04:56:54,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-19 04:56:54,293 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.3125) internal successors, (84), 64 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-19 04:56:54,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:56:54,295 INFO L225 Difference]: With dead ends: 2540 [2021-11-19 04:56:54,295 INFO L226 Difference]: Without dead ends: 2505 [2021-11-19 04:56:54,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 77 SyntacticMatches, 7 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1883 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=433, Invalid=9869, Unknown=0, NotChecked=0, Total=10302 [2021-11-19 04:56:54,297 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 307 mSDsluCounter, 7945 mSDsCounter, 0 mSdLazyCounter, 3702 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 8149 SdHoareTripleChecker+Invalid, 3768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 3702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:56:54,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 8149 Invalid, 3768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 3702 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-19 04:56:54,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2505 states. [2021-11-19 04:56:55,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2505 to 1747. [2021-11-19 04:56:55,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1747 states, 1746 states have (on average 1.0853379152348224) internal successors, (1895), 1746 states have internal predecessors, (1895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:56:55,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1747 states to 1747 states and 1895 transitions. [2021-11-19 04:56:55,591 INFO L78 Accepts]: Start accepts. Automaton has 1747 states and 1895 transitions. Word has length 54 [2021-11-19 04:56:55,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:56:55,592 INFO L470 AbstractCegarLoop]: Abstraction has 1747 states and 1895 transitions. [2021-11-19 04:56:55,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.3125) internal successors, (84), 64 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:56:55,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1747 states and 1895 transitions. [2021-11-19 04:56:55,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-19 04:56:55,593 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:56:55,593 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:56:55,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2021-11-19 04:56:55,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-11-19 04:56:55,794 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:56:55,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:56:55,794 INFO L85 PathProgramCache]: Analyzing trace with hash -481922225, now seen corresponding path program 142 times [2021-11-19 04:56:55,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:56:55,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700104295] [2021-11-19 04:56:55,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:56:55,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:56:55,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:56,520 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 04:56:56,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:56:56,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700104295] [2021-11-19 04:56:56,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700104295] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:56:56,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601073480] [2021-11-19 04:56:56,521 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 04:56:56,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:56:56,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:56:56,542 INFO L229 MonitoredProcess]: Starting monitored process 146 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:56:56,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2021-11-19 04:56:56,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 04:56:56,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:56:56,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 75 conjunts are in the unsatisfiable core [2021-11-19 04:56:56,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:56:57,828 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 04:56:57,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:56:58,289 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 04:56:58,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601073480] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:56:58,289 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:56:58,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 62 [2021-11-19 04:56:58,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891875254] [2021-11-19 04:56:58,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:56:58,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-19 04:56:58,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:56:58,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-19 04:56:58,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=3623, Unknown=0, NotChecked=0, Total=3782 [2021-11-19 04:56:58,291 INFO L87 Difference]: Start difference. First operand 1747 states and 1895 transitions. Second operand has 62 states, 62 states have (on average 1.3225806451612903) internal successors, (82), 62 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) [2021-11-19 04:57:04,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:57:04,727 INFO L93 Difference]: Finished difference Result 2306 states and 2453 transitions. [2021-11-19 04:57:04,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-19 04:57:04,727 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.3225806451612903) internal successors, (82), 62 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 54 [2021-11-19 04:57:04,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:57:04,729 INFO L225 Difference]: With dead ends: 2306 [2021-11-19 04:57:04,729 INFO L226 Difference]: Without dead ends: 2270 [2021-11-19 04:57:04,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 77 SyntacticMatches, 7 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1761 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=427, Invalid=9079, Unknown=0, NotChecked=0, Total=9506 [2021-11-19 04:57:04,730 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 260 mSDsluCounter, 6566 mSDsCounter, 0 mSdLazyCounter, 3226 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 6736 SdHoareTripleChecker+Invalid, 3288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 3226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:57:04,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 6736 Invalid, 3288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 3226 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 04:57:04,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2270 states. [2021-11-19 04:57:06,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2270 to 1734. [2021-11-19 04:57:06,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1733 states have (on average 1.0854010386612811) internal successors, (1881), 1733 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:57:06,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 1881 transitions. [2021-11-19 04:57:06,029 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 1881 transitions. Word has length 54 [2021-11-19 04:57:06,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:57:06,030 INFO L470 AbstractCegarLoop]: Abstraction has 1734 states and 1881 transitions. [2021-11-19 04:57:06,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.3225806451612903) internal successors, (82), 62 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) [2021-11-19 04:57:06,030 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 1881 transitions. [2021-11-19 04:57:06,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-19 04:57:06,031 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:57:06,031 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:57:06,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2021-11-19 04:57:06,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,146 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:57:06,232 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:57:06,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:57:06,232 INFO L85 PathProgramCache]: Analyzing trace with hash -541471697, now seen corresponding path program 143 times [2021-11-19 04:57:06,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:57:06,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252680991] [2021-11-19 04:57:06,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:57:06,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:57:06,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:07,025 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 04:57:07,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:57:07,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252680991] [2021-11-19 04:57:07,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252680991] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:57:07,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545132012] [2021-11-19 04:57:07,026 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 04:57:07,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:57:07,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:57:07,027 INFO L229 MonitoredProcess]: Starting monitored process 147 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:57:07,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2021-11-19 04:57:07,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-19 04:57:07,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:57:07,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-19 04:57:07,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:57:08,304 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 04:57:08,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:57:08,798 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 04:57:08,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545132012] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:57:08,798 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:57:08,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 60 [2021-11-19 04:57:08,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241505582] [2021-11-19 04:57:08,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:57:08,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-19 04:57:08,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:57:08,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-19 04:57:08,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=3382, Unknown=0, NotChecked=0, Total=3540 [2021-11-19 04:57:08,799 INFO L87 Difference]: Start difference. First operand 1734 states and 1881 transitions. Second operand has 60 states, 60 states have (on average 1.3333333333333333) internal successors, (80), 60 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:57:15,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:57:15,293 INFO L93 Difference]: Finished difference Result 2119 states and 2265 transitions. [2021-11-19 04:57:15,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-19 04:57:15,294 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.3333333333333333) internal successors, (80), 60 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-19 04:57:15,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:57:15,295 INFO L225 Difference]: With dead ends: 2119 [2021-11-19 04:57:15,296 INFO L226 Difference]: Without dead ends: 2082 [2021-11-19 04:57:15,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 77 SyntacticMatches, 7 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1643 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=421, Invalid=8321, Unknown=0, NotChecked=0, Total=8742 [2021-11-19 04:57:15,298 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 215 mSDsluCounter, 5261 mSDsCounter, 0 mSdLazyCounter, 2944 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 5397 SdHoareTripleChecker+Invalid, 3004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:57:15,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 5397 Invalid, 3004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2944 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-19 04:57:15,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2082 states. [2021-11-19 04:57:16,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2082 to 1719. [2021-11-19 04:57:16,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 1.0855646100116414) internal successors, (1865), 1718 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:57:16,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 1865 transitions. [2021-11-19 04:57:16,708 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 1865 transitions. Word has length 54 [2021-11-19 04:57:16,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:57:16,708 INFO L470 AbstractCegarLoop]: Abstraction has 1719 states and 1865 transitions. [2021-11-19 04:57:16,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.3333333333333333) internal successors, (80), 60 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:57:16,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 1865 transitions. [2021-11-19 04:57:16,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-19 04:57:16,710 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:57:16,710 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:57:16,736 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2021-11-19 04:57:16,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,147 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:57:16,911 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:57:16,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:57:16,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1008853041, now seen corresponding path program 144 times [2021-11-19 04:57:16,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:57:16,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581991204] [2021-11-19 04:57:16,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:57:16,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:57:16,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:17,634 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 04:57:17,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:57:17,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581991204] [2021-11-19 04:57:17,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581991204] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:57:17,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121989029] [2021-11-19 04:57:17,635 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 04:57:17,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:57:17,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:57:17,636 INFO L229 MonitoredProcess]: Starting monitored process 148 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:57:17,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2021-11-19 04:57:17,698 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-19 04:57:17,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:57:17,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-19 04:57:17,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:57:18,940 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 04:57:18,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:57:19,445 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 04:57:19,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121989029] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:57:19,445 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:57:19,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 58 [2021-11-19 04:57:19,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929951676] [2021-11-19 04:57:19,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:57:19,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-19 04:57:19,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:57:19,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-19 04:57:19,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=3149, Unknown=0, NotChecked=0, Total=3306 [2021-11-19 04:57:19,447 INFO L87 Difference]: Start difference. First operand 1719 states and 1865 transitions. Second operand has 58 states, 58 states have (on average 1.3448275862068966) internal successors, (78), 58 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:57:24,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:57:24,646 INFO L93 Difference]: Finished difference Result 1971 states and 2116 transitions. [2021-11-19 04:57:24,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-19 04:57:24,646 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.3448275862068966) internal successors, (78), 58 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-19 04:57:24,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:57:24,648 INFO L225 Difference]: With dead ends: 1971 [2021-11-19 04:57:24,648 INFO L226 Difference]: Without dead ends: 1933 [2021-11-19 04:57:24,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 77 SyntacticMatches, 7 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1529 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=415, Invalid=7595, Unknown=0, NotChecked=0, Total=8010 [2021-11-19 04:57:24,649 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 182 mSDsluCounter, 3474 mSDsCounter, 0 mSdLazyCounter, 2176 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 3576 SdHoareTripleChecker+Invalid, 2240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 2176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:57:24,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 3576 Invalid, 2240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 2176 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 04:57:24,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1933 states. [2021-11-19 04:57:25,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1933 to 1702. [2021-11-19 04:57:25,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1702 states, 1701 states have (on average 1.0858318636096413) internal successors, (1847), 1701 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:57:25,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1702 states to 1702 states and 1847 transitions. [2021-11-19 04:57:25,837 INFO L78 Accepts]: Start accepts. Automaton has 1702 states and 1847 transitions. Word has length 54 [2021-11-19 04:57:25,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:57:25,837 INFO L470 AbstractCegarLoop]: Abstraction has 1702 states and 1847 transitions. [2021-11-19 04:57:25,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.3448275862068966) internal successors, (78), 58 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:57:25,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1702 states and 1847 transitions. [2021-11-19 04:57:25,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-19 04:57:25,838 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:57:25,838 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:57:25,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2021-11-19 04:57:26,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,148 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:57:26,039 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:57:26,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:57:26,039 INFO L85 PathProgramCache]: Analyzing trace with hash -905732177, now seen corresponding path program 145 times [2021-11-19 04:57:26,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:57:26,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402944129] [2021-11-19 04:57:26,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:57:26,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:57:26,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:26,591 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 04:57:26,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:57:26,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402944129] [2021-11-19 04:57:26,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402944129] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:57:26,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602922840] [2021-11-19 04:57:26,592 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 04:57:26,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:57:26,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:57:26,593 INFO L229 MonitoredProcess]: Starting monitored process 149 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:57:26,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2021-11-19 04:57:26,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:26,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-19 04:57:26,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:57:27,724 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 04:57:27,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:57:28,105 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 04:57:28,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602922840] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:57:28,105 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:57:28,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 56 [2021-11-19 04:57:28,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760261888] [2021-11-19 04:57:28,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:57:28,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-19 04:57:28,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:57:28,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-19 04:57:28,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2924, Unknown=0, NotChecked=0, Total=3080 [2021-11-19 04:57:28,106 INFO L87 Difference]: Start difference. First operand 1702 states and 1847 transitions. Second operand has 56 states, 56 states have (on average 1.3571428571428572) internal successors, (76), 56 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) [2021-11-19 04:57:31,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:57:31,887 INFO L93 Difference]: Finished difference Result 1854 states and 1998 transitions. [2021-11-19 04:57:31,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-19 04:57:31,887 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.3571428571428572) internal successors, (76), 56 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 54 [2021-11-19 04:57:31,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:57:31,889 INFO L225 Difference]: With dead ends: 1854 [2021-11-19 04:57:31,889 INFO L226 Difference]: Without dead ends: 1815 [2021-11-19 04:57:31,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 77 SyntacticMatches, 7 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=409, Invalid=6901, Unknown=0, NotChecked=0, Total=7310 [2021-11-19 04:57:31,890 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 131 mSDsluCounter, 2212 mSDsCounter, 0 mSdLazyCounter, 1676 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 2280 SdHoareTripleChecker+Invalid, 1732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:57:31,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 2280 Invalid, 1732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1676 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 04:57:31,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1815 states. [2021-11-19 04:57:33,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1815 to 1683. [2021-11-19 04:57:33,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1683 states, 1682 states have (on average 1.0862068965517242) internal successors, (1827), 1682 states have internal predecessors, (1827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:57:33,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 1827 transitions. [2021-11-19 04:57:33,066 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 1827 transitions. Word has length 54 [2021-11-19 04:57:33,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:57:33,066 INFO L470 AbstractCegarLoop]: Abstraction has 1683 states and 1827 transitions. [2021-11-19 04:57:33,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.3571428571428572) internal successors, (76), 56 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) [2021-11-19 04:57:33,066 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 1827 transitions. [2021-11-19 04:57:33,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-19 04:57:33,067 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:57:33,067 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:57:33,089 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2021-11-19 04:57:33,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable154 [2021-11-19 04:57:33,268 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:57:33,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:57:33,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1025671394, now seen corresponding path program 146 times [2021-11-19 04:57:33,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:57:33,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302460128] [2021-11-19 04:57:33,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:57:33,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:57:33,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:33,522 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-19 04:57:33,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:57:33,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302460128] [2021-11-19 04:57:33,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302460128] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:57:33,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217992492] [2021-11-19 04:57:33,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:57:33,523 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:57:33,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:57:33,523 INFO L229 MonitoredProcess]: Starting monitored process 150 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:57:33,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2021-11-19 04:57:33,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:57:33,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:57:33,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-19 04:57:33,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:57:34,251 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-19 04:57:34,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:57:34,754 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-19 04:57:34,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217992492] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:57:34,754 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:57:34,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 49 [2021-11-19 04:57:34,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846075856] [2021-11-19 04:57:34,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:57:34,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-19 04:57:34,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:57:34,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-19 04:57:34,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2217, Unknown=0, NotChecked=0, Total=2352 [2021-11-19 04:57:34,755 INFO L87 Difference]: Start difference. First operand 1683 states and 1827 transitions. Second operand has 49 states, 49 states have (on average 1.4489795918367347) internal successors, (71), 49 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) [2021-11-19 04:57:40,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:57:40,677 INFO L93 Difference]: Finished difference Result 2054 states and 2223 transitions. [2021-11-19 04:57:40,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-11-19 04:57:40,678 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.4489795918367347) internal successors, (71), 49 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) Word has length 54 [2021-11-19 04:57:40,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:57:40,679 INFO L225 Difference]: With dead ends: 2054 [2021-11-19 04:57:40,679 INFO L226 Difference]: Without dead ends: 1964 [2021-11-19 04:57:40,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2485 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2728, Invalid=10612, Unknown=0, NotChecked=0, Total=13340 [2021-11-19 04:57:40,681 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 2213 mSDsluCounter, 1902 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2213 SdHoareTripleChecker+Valid, 2002 SdHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:57:40,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2213 Valid, 2002 Invalid, 970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:57:40,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1964 states. [2021-11-19 04:57:42,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1964 to 1838. [2021-11-19 04:57:42,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1838 states, 1837 states have (on average 1.0783886771910725) internal successors, (1981), 1837 states have internal predecessors, (1981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:57:42,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1838 states to 1838 states and 1981 transitions. [2021-11-19 04:57:42,115 INFO L78 Accepts]: Start accepts. Automaton has 1838 states and 1981 transitions. Word has length 54 [2021-11-19 04:57:42,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:57:42,115 INFO L470 AbstractCegarLoop]: Abstraction has 1838 states and 1981 transitions. [2021-11-19 04:57:42,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.4489795918367347) internal successors, (71), 49 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) [2021-11-19 04:57:42,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1838 states and 1981 transitions. [2021-11-19 04:57:42,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-19 04:57:42,117 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:57:42,117 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:57:42,140 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2021-11-19 04:57:42,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-11-19 04:57:42,318 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:57:42,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:57:42,318 INFO L85 PathProgramCache]: Analyzing trace with hash -979055537, now seen corresponding path program 147 times [2021-11-19 04:57:42,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:57:42,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134870070] [2021-11-19 04:57:42,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:57:42,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:57:42,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:42,798 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-19 04:57:42,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:57:42,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134870070] [2021-11-19 04:57:42,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134870070] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:57:42,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323073930] [2021-11-19 04:57:42,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:57:42,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:57:42,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:57:42,799 INFO L229 MonitoredProcess]: Starting monitored process 151 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:57:42,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2021-11-19 04:57:42,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-19 04:57:42,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:57:42,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-19 04:57:42,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:57:43,922 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-19 04:57:43,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:57:44,321 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-19 04:57:44,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323073930] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:57:44,322 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:57:44,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 54 [2021-11-19 04:57:44,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655411745] [2021-11-19 04:57:44,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:57:44,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-19 04:57:44,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:57:44,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-19 04:57:44,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2707, Unknown=0, NotChecked=0, Total=2862 [2021-11-19 04:57:44,323 INFO L87 Difference]: Start difference. First operand 1838 states and 1981 transitions. Second operand has 54 states, 54 states have (on average 1.3703703703703705) internal successors, (74), 54 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:57:48,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:57:48,101 INFO L93 Difference]: Finished difference Result 1952 states and 2098 transitions. [2021-11-19 04:57:48,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-19 04:57:48,101 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.3703703703703705) internal successors, (74), 54 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-19 04:57:48,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:57:48,103 INFO L225 Difference]: With dead ends: 1952 [2021-11-19 04:57:48,103 INFO L226 Difference]: Without dead ends: 1912 [2021-11-19 04:57:48,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 77 SyntacticMatches, 7 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=403, Invalid=6239, Unknown=0, NotChecked=0, Total=6642 [2021-11-19 04:57:48,104 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 108 mSDsluCounter, 1285 mSDsCounter, 0 mSdLazyCounter, 1302 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 1325 SdHoareTripleChecker+Invalid, 1356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:57:48,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 1325 Invalid, 1356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1302 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 04:57:48,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1912 states. [2021-11-19 04:57:49,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1912 to 1831. [2021-11-19 04:57:49,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1831 states, 1830 states have (on average 1.0792349726775956) internal successors, (1975), 1830 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:57:49,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1831 states to 1831 states and 1975 transitions. [2021-11-19 04:57:49,668 INFO L78 Accepts]: Start accepts. Automaton has 1831 states and 1975 transitions. Word has length 54 [2021-11-19 04:57:49,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:57:49,669 INFO L470 AbstractCegarLoop]: Abstraction has 1831 states and 1975 transitions. [2021-11-19 04:57:49,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.3703703703703705) internal successors, (74), 54 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:57:49,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1831 states and 1975 transitions. [2021-11-19 04:57:49,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-19 04:57:49,670 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:57:49,671 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:57:49,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Forceful destruction successful, exit code 0 [2021-11-19 04:57:49,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,151 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:57:49,871 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:57:49,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:57:49,872 INFO L85 PathProgramCache]: Analyzing trace with hash -202467874, now seen corresponding path program 148 times [2021-11-19 04:57:49,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:57:49,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168852284] [2021-11-19 04:57:49,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:57:49,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:57:49,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:50,156 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-19 04:57:50,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:57:50,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168852284] [2021-11-19 04:57:50,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168852284] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:57:50,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249716971] [2021-11-19 04:57:50,157 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 04:57:50,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:57:50,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:57:50,157 INFO L229 MonitoredProcess]: Starting monitored process 152 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:57:50,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2021-11-19 04:57:50,212 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 04:57:50,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:57:50,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-19 04:57:50,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:57:50,962 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-19 04:57:50,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:57:51,558 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-19 04:57:51,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249716971] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:57:51,558 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:57:51,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 50 [2021-11-19 04:57:51,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869628435] [2021-11-19 04:57:51,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:57:51,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-19 04:57:51,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:57:51,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-19 04:57:51,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2303, Unknown=0, NotChecked=0, Total=2450 [2021-11-19 04:57:51,559 INFO L87 Difference]: Start difference. First operand 1831 states and 1975 transitions. Second operand has 50 states, 50 states have (on average 1.44) internal successors, (72), 50 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:57:55,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:57:55,774 INFO L93 Difference]: Finished difference Result 1963 states and 2099 transitions. [2021-11-19 04:57:55,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-19 04:57:55,774 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.44) internal successors, (72), 50 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-19 04:57:55,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:57:55,775 INFO L225 Difference]: With dead ends: 1963 [2021-11-19 04:57:55,776 INFO L226 Difference]: Without dead ends: 1914 [2021-11-19 04:57:55,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 77 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=551, Invalid=4999, Unknown=0, NotChecked=0, Total=5550 [2021-11-19 04:57:55,776 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 1729 mSDsluCounter, 3987 mSDsCounter, 0 mSdLazyCounter, 1709 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1729 SdHoareTripleChecker+Valid, 4128 SdHoareTripleChecker+Invalid, 1775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:57:55,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1729 Valid, 4128 Invalid, 1775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1709 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 04:57:55,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1914 states. [2021-11-19 04:57:57,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1914 to 1831. [2021-11-19 04:57:57,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1831 states, 1830 states have (on average 1.0704918032786885) internal successors, (1959), 1830 states have internal predecessors, (1959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:57:57,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1831 states to 1831 states and 1959 transitions. [2021-11-19 04:57:57,226 INFO L78 Accepts]: Start accepts. Automaton has 1831 states and 1959 transitions. Word has length 54 [2021-11-19 04:57:57,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:57:57,226 INFO L470 AbstractCegarLoop]: Abstraction has 1831 states and 1959 transitions. [2021-11-19 04:57:57,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.44) internal successors, (72), 50 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:57:57,226 INFO L276 IsEmpty]: Start isEmpty. Operand 1831 states and 1959 transitions. [2021-11-19 04:57:57,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-19 04:57:57,228 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:57:57,228 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:57:57,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2021-11-19 04:57:57,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157,152 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:57:57,428 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:57:57,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:57:57,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1377209399, now seen corresponding path program 149 times [2021-11-19 04:57:57,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:57:57,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749158304] [2021-11-19 04:57:57,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:57:57,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:57:57,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:58,190 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:57:58,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:57:58,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749158304] [2021-11-19 04:57:58,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749158304] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:57:58,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893838362] [2021-11-19 04:57:58,190 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 04:57:58,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:57:58,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:57:58,191 INFO L229 MonitoredProcess]: Starting monitored process 153 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:57:58,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec59a602-875e-46fc-94de-720ce7a9b81c/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2021-11-19 04:57:58,249 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-11-19 04:57:58,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:57:58,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-19 04:57:58,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:58:00,382 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:58:00,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:58:01,661 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:58:01,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893838362] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:58:01,661 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:58:01,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 89 [2021-11-19 04:58:01,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733695568] [2021-11-19 04:58:01,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:58:01,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-11-19 04:58:01,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:58:01,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-11-19 04:58:01,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=7585, Unknown=0, NotChecked=0, Total=7832 [2021-11-19 04:58:01,663 INFO L87 Difference]: Start difference. First operand 1831 states and 1959 transitions. Second operand has 89 states, 89 states have (on average 1.3370786516853932) internal successors, (119), 89 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)