./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/num_conversion_2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/num_conversion_2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7e0da033eb6b5a3b4db0394198751cf880534ee28b64f0bd7b196bfba1d785e1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:33:49,169 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:33:49,171 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:33:49,207 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:33:49,208 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:33:49,209 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:33:49,212 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:33:49,215 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:33:49,217 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:33:49,219 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:33:49,220 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:33:49,222 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:33:49,223 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:33:49,224 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:33:49,226 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:33:49,228 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:33:49,230 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:33:49,231 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:33:49,234 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:33:49,237 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:33:49,239 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:33:49,241 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:33:49,243 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:33:49,244 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:33:49,249 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:33:49,249 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:33:49,250 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:33:49,251 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:33:49,252 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:33:49,253 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:33:49,254 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:33:49,255 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:33:49,256 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:33:49,257 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:33:49,259 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:33:49,259 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:33:49,260 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:33:49,261 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:33:49,261 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:33:49,263 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:33:49,263 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:33:49,264 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-13 02:33:49,295 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:33:49,295 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:33:49,296 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:33:49,296 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:33:49,297 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:33:49,297 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:33:49,297 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:33:49,298 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 02:33:49,298 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:33:49,298 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:33:49,298 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 02:33:49,299 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 02:33:49,299 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:33:49,299 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 02:33:49,300 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 02:33:49,300 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 02:33:49,301 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:33:49,301 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 02:33:49,301 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 02:33:49,302 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 02:33:49,302 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:33:49,302 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:33:49,302 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:33:49,303 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:33:49,303 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:33:49,303 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 02:33:49,304 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:33:49,304 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:33:49,304 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:33:49,304 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:33:49,305 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:33:49,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:33:49,310 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:33:49,310 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:33:49,311 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:33:49,311 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 02:33:49,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 02:33:49,312 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:33:49,312 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:33:49,312 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:33:49,313 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e0da033eb6b5a3b4db0394198751cf880534ee28b64f0bd7b196bfba1d785e1 [2021-11-13 02:33:49,616 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:33:49,644 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:33:49,648 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:33:49,650 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:33:49,651 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:33:49,652 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/bitvector/num_conversion_2.c [2021-11-13 02:33:49,754 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/data/ee447781c/ce2f2955833c430c82991b7d6f6a2b8f/FLAG9ba646a7c [2021-11-13 02:33:50,405 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:33:50,406 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/sv-benchmarks/c/bitvector/num_conversion_2.c [2021-11-13 02:33:50,420 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/data/ee447781c/ce2f2955833c430c82991b7d6f6a2b8f/FLAG9ba646a7c [2021-11-13 02:33:50,765 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/data/ee447781c/ce2f2955833c430c82991b7d6f6a2b8f [2021-11-13 02:33:50,769 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:33:50,771 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:33:50,773 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:33:50,774 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:33:50,778 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:33:50,779 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:33:50" (1/1) ... [2021-11-13 02:33:50,780 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44fc5daf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:50, skipping insertion in model container [2021-11-13 02:33:50,780 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:33:50" (1/1) ... [2021-11-13 02:33:50,789 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:33:50,806 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:33:51,020 WARN L228 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_251bca05-10f8-42cc-8db1-9e9ec8e6909a/sv-benchmarks/c/bitvector/num_conversion_2.c[685,698] [2021-11-13 02:33:51,048 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:33:51,057 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 02:33:51,071 WARN L228 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_251bca05-10f8-42cc-8db1-9e9ec8e6909a/sv-benchmarks/c/bitvector/num_conversion_2.c[685,698] [2021-11-13 02:33:51,076 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:33:51,091 INFO L208 MainTranslator]: Completed translation [2021-11-13 02:33:51,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:51 WrapperNode [2021-11-13 02:33:51,092 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:33:51,093 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 02:33:51,094 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 02:33:51,094 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 02:33:51,103 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:51" (1/1) ... [2021-11-13 02:33:51,111 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:51" (1/1) ... [2021-11-13 02:33:51,131 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 02:33:51,133 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 02:33:51,133 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 02:33:51,133 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 02:33:51,143 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:51" (1/1) ... [2021-11-13 02:33:51,143 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:51" (1/1) ... [2021-11-13 02:33:51,145 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:51" (1/1) ... [2021-11-13 02:33:51,145 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:51" (1/1) ... [2021-11-13 02:33:51,150 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:51" (1/1) ... [2021-11-13 02:33:51,155 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:51" (1/1) ... [2021-11-13 02:33:51,156 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:51" (1/1) ... [2021-11-13 02:33:51,158 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 02:33:51,159 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 02:33:51,159 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 02:33:51,159 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 02:33:51,160 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:51" (1/1) ... [2021-11-13 02:33:51,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:33:51,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:33:51,198 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 02:33:51,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 02:33:51,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 02:33:51,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 02:33:51,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 02:33:51,244 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 02:33:51,498 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 02:33:51,498 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-13 02:33:51,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:33:51 BoogieIcfgContainer [2021-11-13 02:33:51,501 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 02:33:51,503 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 02:33:51,503 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 02:33:51,507 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 02:33:51,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:33:50" (1/3) ... [2021-11-13 02:33:51,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e5c001d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:33:51, skipping insertion in model container [2021-11-13 02:33:51,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:51" (2/3) ... [2021-11-13 02:33:51,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e5c001d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:33:51, skipping insertion in model container [2021-11-13 02:33:51,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:33:51" (3/3) ... [2021-11-13 02:33:51,510 INFO L111 eAbstractionObserver]: Analyzing ICFG num_conversion_2.c [2021-11-13 02:33:51,516 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 02:33:51,516 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 02:33:51,598 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 02:33:51,606 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=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 02:33:51,607 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 02:33:51,622 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:33:51,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-13 02:33:51,627 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:51,628 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-13 02:33:51,628 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:51,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:51,634 INFO L85 PathProgramCache]: Analyzing trace with hash 2065991, now seen corresponding path program 1 times [2021-11-13 02:33:51,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:33:51,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052980874] [2021-11-13 02:33:51,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:51,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:33:51,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:51,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:33:51,814 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:33:51,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052980874] [2021-11-13 02:33:51,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052980874] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:33:51,815 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:33:51,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 02:33:51,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127391927] [2021-11-13 02:33:51,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:51,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:33:51,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:33:51,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:33:51,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:33:51,854 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:33:51,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:51,881 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2021-11-13 02:33:51,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:33:51,884 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2021-11-13 02:33:51,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:51,892 INFO L225 Difference]: With dead ends: 13 [2021-11-13 02:33:51,892 INFO L226 Difference]: Without dead ends: 6 [2021-11-13 02:33:51,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:33:51,899 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.42ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.35ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:51,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 7 Unknown, 0 Unchecked, 0.42ms Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 12.35ms Time] [2021-11-13 02:33:51,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2021-11-13 02:33:51,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2021-11-13 02:33:51,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 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) [2021-11-13 02:33:51,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2021-11-13 02:33:51,934 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2021-11-13 02:33:51,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:51,934 INFO L470 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2021-11-13 02:33:51,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:33:51,935 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2021-11-13 02:33:51,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-13 02:33:51,935 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:51,935 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-13 02:33:51,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 02:33:51,936 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:51,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:51,937 INFO L85 PathProgramCache]: Analyzing trace with hash 64150435, now seen corresponding path program 1 times [2021-11-13 02:33:51,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:33:51,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802688463] [2021-11-13 02:33:51,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:51,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:33:51,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:52,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:33:52,009 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:33:52,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802688463] [2021-11-13 02:33:52,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802688463] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:33:52,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35565843] [2021-11-13 02:33:52,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:52,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:33:52,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:33:52,018 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:33:52,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 02:33:52,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:52,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:33:52,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:52,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:33:52,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:52,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:33:52,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35565843] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:33:52,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1539261165] [2021-11-13 02:33:52,203 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-13 02:33:52,203 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:33:52,208 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-13 02:33:52,213 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-13 02:33:52,213 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-13 02:33:52,241 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:33:52,252 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:33:52,253 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:33:52,254 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-13 02:33:52,255 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:33:52,256 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:33:52,256 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-13 02:33:52,260 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-11-13 02:33:52,282 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_9|], 21=[|v_#valid_10|]} [2021-11-13 02:33:52,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:33:52,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:33:52,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:33:52,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-13 02:33:52,307 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:33:52,308 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 02:33:52,309 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:33:52,309 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 02:33:52,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 02:33:52,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:33:52,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:33:52,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:33:52,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:33:52,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:33:52,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:33:52,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:33:52,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:33:52,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:33:52,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:33:52,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:33:52,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-13 02:33:52,365 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:33:52,368 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-13 02:33:52,369 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:33:52,370 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-13 02:33:52,370 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 02:33:52,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:33:52,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:33:52,395 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:33:52,397 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-13 02:33:52,398 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-13 02:33:52,398 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:122, output treesize:97 [2021-11-13 02:33:52,405 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:33:52,411 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 116 [2021-11-13 02:33:52,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:33:52,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:33:52,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:33:52,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:33:52,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:33:52,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:33:52,561 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:33:52,595 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:33:52,598 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:33:52,616 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:33:52,620 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:33:52,658 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 138 [2021-11-13 02:33:52,662 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 138 [2021-11-13 02:33:52,667 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:33:52,670 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:33:52,676 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:33:52,678 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:33:52,682 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-11-13 02:33:52,687 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:33:52,688 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:33:52,692 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 54 [2021-11-13 02:33:52,694 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 142 [2021-11-13 02:33:52,698 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 198 [2021-11-13 02:33:52,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:33:52,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:33:52,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:33:52,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:33:52,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:33:52,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:33:52,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:33:52,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:33:52,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:33:52,774 INFO L180 QuantifierPusher]: treesize reduction 30, result has 70.0 percent of original size [2021-11-13 02:33:52,798 INFO L185 QuantifierPusher]: treesize reduction 6, result has 90.9 percent of original size 60 [2021-11-13 02:33:52,814 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-13 02:33:53,160 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 02:33:53,160 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:33:53,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-11-13 02:33:53,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657919121] [2021-11-13 02:33:53,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:33:53,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 02:33:53,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:33:53,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 02:33:53,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-13 02:33:53,163 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:33:53,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:53,209 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2021-11-13 02:33:53,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:33:53,210 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 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 5 [2021-11-13 02:33:53,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:53,211 INFO L225 Difference]: With dead ends: 12 [2021-11-13 02:33:53,211 INFO L226 Difference]: Without dead ends: 9 [2021-11-13 02:33:53,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:33:53,214 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.34ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.66ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:53,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 17 Unknown, 0 Unchecked, 2.34ms Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 24.66ms Time] [2021-11-13 02:33:53,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-13 02:33:53,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-13 02:33:53,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:33:53,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-11-13 02:33:53,223 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2021-11-13 02:33:53,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:53,224 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-11-13 02:33:53,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:33:53,224 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-11-13 02:33:53,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-13 02:33:53,225 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:53,225 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2021-11-13 02:33:53,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 02:33:53,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:33:53,450 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:53,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:53,450 INFO L85 PathProgramCache]: Analyzing trace with hash -50856633, now seen corresponding path program 2 times [2021-11-13 02:33:53,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:33:53,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275011960] [2021-11-13 02:33:53,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:53,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:33:53,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:53,602 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:33:53,603 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:33:53,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275011960] [2021-11-13 02:33:53,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275011960] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:33:53,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437878397] [2021-11-13 02:33:53,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 02:33:53,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:33:53,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:33:53,614 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:33:53,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 02:33:53,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-13 02:33:53,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:33:53,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-13 02:33:53,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:53,851 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:33:53,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:54,073 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:33:54,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437878397] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:33:54,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [723604517] [2021-11-13 02:33:54,077 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-13 02:33:54,077 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:33:54,077 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-13 02:33:54,078 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-13 02:33:54,078 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-13 02:33:54,084 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:33:54,086 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:33:54,087 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:33:54,087 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-13 02:33:54,088 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:33:54,089 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:33:54,089 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-13 02:33:54,091 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-11-13 02:33:54,095 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_10|], 21=[|v_#valid_11|]} [2021-11-13 02:33:54,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:33:54,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:33:54,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:33:54,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-13 02:33:54,108 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:33:54,108 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 02:33:54,109 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:33:54,110 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-13 02:33:54,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-13 02:33:54,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:33:54,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:33:54,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:33:54,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:33:54,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:33:54,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:33:54,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:33:54,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:33:54,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:33:54,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:33:54,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:33:54,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-13 02:33:54,137 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:33:54,140 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-13 02:33:54,141 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:33:54,142 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-13 02:33:54,142 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-13 02:33:54,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:33:54,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:33:54,148 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:33:54,150 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-13 02:33:54,151 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-13 02:33:54,151 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:122, output treesize:97 [2021-11-13 02:33:54,155 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:33:54,159 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 116 [2021-11-13 02:33:54,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:33:54,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:33:54,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:33:54,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:33:54,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:33:54,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:33:54,208 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:33:54,245 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:33:54,249 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:33:54,255 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:33:54,257 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:33:54,273 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 150 [2021-11-13 02:33:54,276 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 150 [2021-11-13 02:33:54,276 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:33:54,278 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:33:54,289 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:33:54,291 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:33:54,297 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:33:54,298 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:33:54,301 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 60 [2021-11-13 02:33:54,308 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:33:54,309 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:33:54,317 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-13 02:33:54,320 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 138 [2021-11-13 02:33:54,324 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 138 [2021-11-13 02:33:54,326 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:33:54,327 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:33:54,331 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-11-13 02:33:54,336 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 201 [2021-11-13 02:33:54,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:33:54,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:33:54,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:33:54,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:33:54,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:33:54,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:33:54,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:33:54,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:33:54,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-13 02:33:54,407 INFO L180 QuantifierPusher]: treesize reduction 30, result has 70.0 percent of original size [2021-11-13 02:33:54,421 INFO L185 QuantifierPusher]: treesize reduction 6, result has 90.9 percent of original size 60 [2021-11-13 02:33:54,430 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-13 02:33:54,762 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 02:33:54,762 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:33:54,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2021-11-13 02:33:54,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419855376] [2021-11-13 02:33:54,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:33:54,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-13 02:33:54,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:33:54,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-13 02:33:54,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-11-13 02:33:54,765 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 16 states, 16 states have (on average 1.1875) internal successors, (19), 15 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) [2021-11-13 02:33:55,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:55,174 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2021-11-13 02:33:55,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-13 02:33:55,175 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.1875) internal successors, (19), 15 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 8 [2021-11-13 02:33:55,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:55,176 INFO L225 Difference]: With dead ends: 18 [2021-11-13 02:33:55,176 INFO L226 Difference]: Without dead ends: 15 [2021-11-13 02:33:55,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=156, Invalid=350, Unknown=0, NotChecked=0, Total=506 [2021-11-13 02:33:55,178 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 9 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 67.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.96ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 100.73ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:55,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 8 Invalid, 52 Unknown, 0 Unchecked, 0.96ms Time], IncrementalHoareTripleChecker [15 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 100.73ms Time] [2021-11-13 02:33:55,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-13 02:33:55,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-13 02:33:55,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:33:55,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-11-13 02:33:55,186 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 8 [2021-11-13 02:33:55,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:55,186 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-11-13 02:33:55,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.1875) internal successors, (19), 15 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) [2021-11-13 02:33:55,187 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-11-13 02:33:55,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-13 02:33:55,187 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:55,187 INFO L514 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1] [2021-11-13 02:33:55,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 02:33:55,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:33:55,406 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:55,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:55,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1522332743, now seen corresponding path program 3 times [2021-11-13 02:33:55,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:33:55,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14029544] [2021-11-13 02:33:55,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:55,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:33:55,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 02:33:55,444 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-13 02:33:55,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 02:33:55,526 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-13 02:33:55,529 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-13 02:33:55,530 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-13 02:33:55,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-11-13 02:33:55,539 INFO L732 BasicCegarLoop]: Path program histogram: [3, 1] [2021-11-13 02:33:55,546 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-13 02:33:55,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.11 02:33:55 BoogieIcfgContainer [2021-11-13 02:33:55,575 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-13 02:33:55,575 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-13 02:33:55,575 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-13 02:33:55,575 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-13 02:33:55,576 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:33:51" (3/4) ... [2021-11-13 02:33:55,579 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-13 02:33:55,579 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-13 02:33:55,580 INFO L158 Benchmark]: Toolchain (without parser) took 4808.46ms. Allocated memory was 92.3MB in the beginning and 130.0MB in the end (delta: 37.7MB). Free memory was 57.7MB in the beginning and 86.3MB in the end (delta: -28.5MB). Peak memory consumption was 8.2MB. Max. memory is 16.1GB. [2021-11-13 02:33:55,580 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 92.3MB. Free memory was 61.6MB in the beginning and 61.6MB in the end (delta: 24.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 02:33:55,580 INFO L158 Benchmark]: CACSL2BoogieTranslator took 319.26ms. Allocated memory was 92.3MB in the beginning and 130.0MB in the end (delta: 37.7MB). Free memory was 57.5MB in the beginning and 106.5MB in the end (delta: -49.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-13 02:33:55,581 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.38ms. Allocated memory is still 130.0MB. Free memory was 106.5MB in the beginning and 104.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-13 02:33:55,581 INFO L158 Benchmark]: Boogie Preprocessor took 25.50ms. Allocated memory is still 130.0MB. Free memory was 104.4MB in the beginning and 103.8MB in the end (delta: 638.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 02:33:55,581 INFO L158 Benchmark]: RCFGBuilder took 342.60ms. Allocated memory is still 130.0MB. Free memory was 103.8MB in the beginning and 93.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-13 02:33:55,581 INFO L158 Benchmark]: TraceAbstraction took 4071.69ms. Allocated memory is still 130.0MB. Free memory was 92.6MB in the beginning and 86.3MB in the end (delta: 6.3MB). Peak memory consumption was 7.0MB. Max. memory is 16.1GB. [2021-11-13 02:33:55,582 INFO L158 Benchmark]: Witness Printer took 3.77ms. Allocated memory is still 130.0MB. Free memory is still 86.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 02:33:55,583 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 92.3MB. Free memory was 61.6MB in the beginning and 61.6MB in the end (delta: 24.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 319.26ms. Allocated memory was 92.3MB in the beginning and 130.0MB in the end (delta: 37.7MB). Free memory was 57.5MB in the beginning and 106.5MB in the end (delta: -49.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.38ms. Allocated memory is still 130.0MB. Free memory was 106.5MB in the beginning and 104.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 25.50ms. Allocated memory is still 130.0MB. Free memory was 104.4MB in the beginning and 103.8MB in the end (delta: 638.8kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 342.60ms. Allocated memory is still 130.0MB. Free memory was 103.8MB in the beginning and 93.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 4071.69ms. Allocated memory is still 130.0MB. Free memory was 92.6MB in the beginning and 86.3MB in the end (delta: 6.3MB). Peak memory consumption was 7.0MB. Max. memory is 16.1GB. * Witness Printer took 3.77ms. Allocated memory is still 130.0MB. Free memory is still 86.3MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 16]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of shiftLeft at line 31, overapproximation of bitwiseAnd at line 32. Possible FailurePath: [L24] unsigned char x = __VERIFIER_nondet_uchar(); [L25] unsigned char y; [L26] unsigned char c; [L28] y = 0 [L29] c = 0 VAL [c=0, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; [L33] COND TRUE bit != (unsigned char)0 [L34] y = y + i [L36] c = c + ((unsigned char)1) VAL [bit=1, c=1, i=0, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; [L33] COND TRUE bit != (unsigned char)0 [L34] y = y + i [L36] c = c + ((unsigned char)1) VAL [bit=1, c=2, i=0, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; [L33] COND TRUE bit != (unsigned char)0 [L34] y = y + i [L36] c = c + ((unsigned char)1) VAL [bit=1, c=3, i=0, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; [L33] COND FALSE !(bit != (unsigned char)0) [L36] c = c + ((unsigned char)1) VAL [bit=0, c=4, i=0, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; [L33] COND TRUE bit != (unsigned char)0 [L34] y = y + i [L36] c = c + ((unsigned char)1) VAL [bit=1, c=5, i=0, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; [L33] COND TRUE bit != (unsigned char)0 [L34] y = y + i [L36] c = c + ((unsigned char)1) VAL [bit=1, c=6, i=0, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; [L33] COND TRUE bit != (unsigned char)0 [L34] y = y + i [L36] c = c + ((unsigned char)1) VAL [bit=1, c=7, i=0, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; [L33] COND FALSE !(bit != (unsigned char)0) [L36] c = c + ((unsigned char)1) VAL [bit=0, c=8, i=0, y=0] [L30] COND FALSE !(c < (unsigned char)8) [L38] CALL __VERIFIER_assert(x == y) [L15] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L16] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.9s, OverallIterations: 4, TraceHistogramMax: 8, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9 SdHoareTripleChecker+Valid, 137.74ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 9 mSDsluCounter, 24 SdHoareTripleChecker+Invalid, 99.47ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 18 mSDsCounter, 18 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 58 IncrementalHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 18 mSolverCounterUnsat, 7 mSDtfsCounter, 58 mSolverCounterSat, 3.72ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=3, InterpolantAutomatonStates: 22, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 42 NumberOfCodeBlocks, 42 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 228 SizeOfPredicates, 4 NumberOfNonLiveVariables, 106 ConjunctsInSsa, 22 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/33 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-13 02:33:55,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/num_conversion_2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7e0da033eb6b5a3b4db0394198751cf880534ee28b64f0bd7b196bfba1d785e1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:33:58,131 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:33:58,135 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:33:58,191 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:33:58,192 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:33:58,193 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:33:58,195 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:33:58,197 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:33:58,199 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:33:58,201 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:33:58,202 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:33:58,203 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:33:58,204 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:33:58,205 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:33:58,207 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:33:58,208 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:33:58,210 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:33:58,211 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:33:58,213 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:33:58,216 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:33:58,218 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:33:58,219 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:33:58,221 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:33:58,222 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:33:58,226 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:33:58,226 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:33:58,227 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:33:58,228 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:33:58,228 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:33:58,230 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:33:58,230 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:33:58,231 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:33:58,232 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:33:58,233 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:33:58,234 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:33:58,235 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:33:58,236 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:33:58,236 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:33:58,237 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:33:58,238 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:33:58,239 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:33:58,243 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-13 02:33:58,286 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:33:58,287 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:33:58,288 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:33:58,289 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:33:58,289 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:33:58,289 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:33:58,289 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:33:58,289 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:33:58,290 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:33:58,290 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:33:58,292 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:33:58,293 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 02:33:58,293 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 02:33:58,293 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:33:58,293 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:33:58,293 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:33:58,294 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:33:58,294 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:33:58,294 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 02:33:58,294 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 02:33:58,294 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 02:33:58,295 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:33:58,295 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:33:58,295 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:33:58,295 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:33:58,295 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 02:33:58,296 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:33:58,296 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:33:58,296 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:33:58,296 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:33:58,296 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:33:58,297 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-13 02:33:58,297 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 02:33:58,297 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:33:58,297 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:33:58,298 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:33:58,298 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e0da033eb6b5a3b4db0394198751cf880534ee28b64f0bd7b196bfba1d785e1 [2021-11-13 02:33:58,705 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:33:58,728 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:33:58,731 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:33:58,732 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:33:58,733 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:33:58,734 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/bitvector/num_conversion_2.c [2021-11-13 02:33:58,818 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/data/a02e2ee4c/8d6c7461b79042768454bfdb2e6570b2/FLAGfc03c8a85 [2021-11-13 02:33:59,409 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:33:59,410 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/sv-benchmarks/c/bitvector/num_conversion_2.c [2021-11-13 02:33:59,417 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/data/a02e2ee4c/8d6c7461b79042768454bfdb2e6570b2/FLAGfc03c8a85 [2021-11-13 02:33:59,774 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/data/a02e2ee4c/8d6c7461b79042768454bfdb2e6570b2 [2021-11-13 02:33:59,777 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:33:59,778 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:33:59,780 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:33:59,780 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:33:59,785 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:33:59,786 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:33:59" (1/1) ... [2021-11-13 02:33:59,788 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d070eec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:59, skipping insertion in model container [2021-11-13 02:33:59,789 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:33:59" (1/1) ... [2021-11-13 02:33:59,798 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:33:59,817 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:33:59,962 WARN L228 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_251bca05-10f8-42cc-8db1-9e9ec8e6909a/sv-benchmarks/c/bitvector/num_conversion_2.c[685,698] [2021-11-13 02:33:59,975 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:33:59,986 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 02:34:00,019 WARN L228 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_251bca05-10f8-42cc-8db1-9e9ec8e6909a/sv-benchmarks/c/bitvector/num_conversion_2.c[685,698] [2021-11-13 02:34:00,046 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:34:00,069 INFO L208 MainTranslator]: Completed translation [2021-11-13 02:34:00,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:00 WrapperNode [2021-11-13 02:34:00,071 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:34:00,072 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 02:34:00,072 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 02:34:00,072 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 02:34:00,080 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:00" (1/1) ... [2021-11-13 02:34:00,089 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:00" (1/1) ... [2021-11-13 02:34:00,107 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 02:34:00,108 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 02:34:00,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 02:34:00,109 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 02:34:00,118 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:00" (1/1) ... [2021-11-13 02:34:00,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:00" (1/1) ... [2021-11-13 02:34:00,134 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:00" (1/1) ... [2021-11-13 02:34:00,135 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:00" (1/1) ... [2021-11-13 02:34:00,140 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:00" (1/1) ... [2021-11-13 02:34:00,147 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:00" (1/1) ... [2021-11-13 02:34:00,150 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:00" (1/1) ... [2021-11-13 02:34:00,156 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 02:34:00,157 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 02:34:00,157 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 02:34:00,157 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 02:34:00,158 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:00" (1/1) ... [2021-11-13 02:34:00,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:34:00,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:34:00,186 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 02:34:00,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 02:34:00,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 02:34:00,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 02:34:00,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 02:34:00,231 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 02:34:00,478 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 02:34:00,479 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-13 02:34:00,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:34:00 BoogieIcfgContainer [2021-11-13 02:34:00,481 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 02:34:00,483 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 02:34:00,483 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 02:34:00,487 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 02:34:00,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:33:59" (1/3) ... [2021-11-13 02:34:00,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cc0ead9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:34:00, skipping insertion in model container [2021-11-13 02:34:00,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:00" (2/3) ... [2021-11-13 02:34:00,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cc0ead9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:34:00, skipping insertion in model container [2021-11-13 02:34:00,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:34:00" (3/3) ... [2021-11-13 02:34:00,490 INFO L111 eAbstractionObserver]: Analyzing ICFG num_conversion_2.c [2021-11-13 02:34:00,496 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 02:34:00,497 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 02:34:00,560 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 02:34:00,573 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=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 02:34:00,574 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 02:34:00,599 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:34:00,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-13 02:34:00,609 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:00,610 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-13 02:34:00,610 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:00,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:00,620 INFO L85 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2021-11-13 02:34:00,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:34:00,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [881743120] [2021-11-13 02:34:00,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:00,633 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:34:00,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:34:00,637 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:34:00,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 02:34:00,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:00,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-13 02:34:00,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:00,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:00,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:00,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:00,889 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:34:00,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [881743120] [2021-11-13 02:34:00,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [881743120] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:00,895 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:34:00,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-13 02:34:00,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965261434] [2021-11-13 02:34:00,899 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:00,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 02:34:00,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:34:00,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 02:34:00,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 02:34:00,951 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2021-11-13 02:34:00,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:00,966 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-11-13 02:34:00,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 02:34:00,970 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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 [2021-11-13 02:34:00,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:00,978 INFO L225 Difference]: With dead ends: 21 [2021-11-13 02:34:00,979 INFO L226 Difference]: Without dead ends: 9 [2021-11-13 02:34:00,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 02:34:00,987 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.45ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:00,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.45ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 02:34:01,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-13 02:34:01,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-13 02:34:01,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:34:01,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-11-13 02:34:01,024 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2021-11-13 02:34:01,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:01,024 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-11-13 02:34:01,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2021-11-13 02:34:01,025 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-11-13 02:34:01,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-13 02:34:01,026 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:01,027 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-13 02:34:01,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:01,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:34:01,240 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:01,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:01,244 INFO L85 PathProgramCache]: Analyzing trace with hash 889640786, now seen corresponding path program 1 times [2021-11-13 02:34:01,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:34:01,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1096901238] [2021-11-13 02:34:01,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:01,249 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:34:01,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:34:01,250 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:34:01,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 02:34:01,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:01,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:34:01,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:01,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:01,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:01,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:01,394 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:34:01,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1096901238] [2021-11-13 02:34:01,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1096901238] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:01,395 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:34:01,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 02:34:01,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291755260] [2021-11-13 02:34:01,395 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:01,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:34:01,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:34:01,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:34:01,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:34:01,398 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:34:01,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:01,417 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2021-11-13 02:34:01,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:34:01,418 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 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 [2021-11-13 02:34:01,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:01,419 INFO L225 Difference]: With dead ends: 17 [2021-11-13 02:34:01,419 INFO L226 Difference]: Without dead ends: 13 [2021-11-13 02:34:01,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:34:01,421 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 9 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.76ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.95ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:01,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 14 Invalid, 8 Unknown, 0 Unchecked, 0.76ms Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 10.95ms Time] [2021-11-13 02:34:01,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-13 02:34:01,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-13 02:34:01,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:34:01,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-11-13 02:34:01,427 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 6 [2021-11-13 02:34:01,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:01,428 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-11-13 02:34:01,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:34:01,428 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-11-13 02:34:01,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-13 02:34:01,429 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:01,429 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-13 02:34:01,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:01,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:34:01,641 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:01,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:01,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1950053902, now seen corresponding path program 1 times [2021-11-13 02:34:01,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:34:01,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1394024931] [2021-11-13 02:34:01,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:01,643 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:34:01,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:34:01,644 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:34:01,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 02:34:01,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:01,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:34:01,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:01,816 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:01,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:01,935 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:01,935 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:34:01,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1394024931] [2021-11-13 02:34:01,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1394024931] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:34:01,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [177106133] [2021-11-13 02:34:01,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:01,937 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:34:01,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:34:01,957 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:34:01,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-13 02:34:02,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:02,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:34:02,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:02,160 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:02,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:02,226 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:02,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [177106133] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:34:02,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739913941] [2021-11-13 02:34:02,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:02,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:34:02,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:34:02,237 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:34:02,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 02:34:02,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:02,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 02:34:02,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:02,371 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:02,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:02,479 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:02,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739913941] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:34:02,480 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 02:34:02,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 6] total 10 [2021-11-13 02:34:02,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683570779] [2021-11-13 02:34:02,481 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 02:34:02,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 02:34:02,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:34:02,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 02:34:02,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-13 02:34:02,484 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:34:02,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:02,610 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2021-11-13 02:34:02,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 02:34:02,611 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-13 02:34:02,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:02,612 INFO L225 Difference]: With dead ends: 29 [2021-11-13 02:34:02,612 INFO L226 Difference]: Without dead ends: 25 [2021-11-13 02:34:02,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-11-13 02:34:02,614 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 38 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.86ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47.64ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:02,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 47 Invalid, 43 Unknown, 0 Unchecked, 3.86ms Time], IncrementalHoareTripleChecker [11 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 47.64ms Time] [2021-11-13 02:34:02,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-13 02:34:02,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-13 02:34:02,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:34:02,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2021-11-13 02:34:02,622 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 12 [2021-11-13 02:34:02,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:02,627 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2021-11-13 02:34:02,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:34:02,628 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2021-11-13 02:34:02,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-13 02:34:02,629 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:02,629 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1] [2021-11-13 02:34:02,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:02,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:03,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:03,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 02:34:03,238 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:03,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:03,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1786738894, now seen corresponding path program 2 times [2021-11-13 02:34:03,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:34:03,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1101287095] [2021-11-13 02:34:03,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 02:34:03,240 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:34:03,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:34:03,248 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:34:03,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 02:34:03,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 02:34:03,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:34:03,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 02:34:03,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:03,445 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:03,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:03,650 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:03,651 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:34:03,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1101287095] [2021-11-13 02:34:03,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1101287095] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:34:03,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1883419026] [2021-11-13 02:34:03,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 02:34:03,653 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:34:03,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:34:03,658 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:34:03,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-13 02:34:03,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 02:34:03,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:34:03,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 02:34:03,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:03,840 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:03,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:03,919 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:03,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1883419026] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:34:03,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415978175] [2021-11-13 02:34:03,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 02:34:03,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:34:03,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:34:03,929 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:34:03,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-13 02:34:03,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 02:34:03,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:34:03,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 02:34:03,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:04,063 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:04,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:04,401 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:04,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415978175] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:34:04,402 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 02:34:04,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 10] total 22 [2021-11-13 02:34:04,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483946855] [2021-11-13 02:34:04,403 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 02:34:04,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-13 02:34:04,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:34:04,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-13 02:34:04,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2021-11-13 02:34:04,406 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 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) [2021-11-13 02:34:04,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:04,868 INFO L93 Difference]: Finished difference Result 53 states and 74 transitions. [2021-11-13 02:34:04,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-13 02:34:04,869 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 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 24 [2021-11-13 02:34:04,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:04,870 INFO L225 Difference]: With dead ends: 53 [2021-11-13 02:34:04,870 INFO L226 Difference]: Without dead ends: 49 [2021-11-13 02:34:04,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=248, Invalid=622, Unknown=0, NotChecked=0, Total=870 [2021-11-13 02:34:04,873 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 132 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 76.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.77ms SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 90.92ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:04,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 134 Invalid, 136 Unknown, 0 Unchecked, 3.77ms Time], IncrementalHoareTripleChecker [26 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 90.92ms Time] [2021-11-13 02:34:04,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-13 02:34:04,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-11-13 02:34:04,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.3333333333333333) internal successors, (64), 48 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) [2021-11-13 02:34:04,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 64 transitions. [2021-11-13 02:34:04,882 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 64 transitions. Word has length 24 [2021-11-13 02:34:04,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:04,883 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 64 transitions. [2021-11-13 02:34:04,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 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) [2021-11-13 02:34:04,884 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 64 transitions. [2021-11-13 02:34:04,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-13 02:34:04,885 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:04,885 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1] [2021-11-13 02:34:04,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:05,119 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-13 02:34:05,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:05,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 02:34:05,497 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:05,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:05,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1720528430, now seen corresponding path program 3 times [2021-11-13 02:34:05,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:34:05,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [932859520] [2021-11-13 02:34:05,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 02:34:05,499 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:34:05,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:34:05,500 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:34:05,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-13 02:34:05,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-13 02:34:05,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:34:05,582 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-13 02:34:05,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:09,140 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 40 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:09,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:13,668 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:13,669 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:34:13,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [932859520] [2021-11-13 02:34:13,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [932859520] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:34:13,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2087597014] [2021-11-13 02:34:13,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 02:34:13,670 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:34:13,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:34:13,686 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:34:13,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-13 02:34:13,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-13 02:34:13,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:34:13,789 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-13 02:34:13,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:15,114 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 40 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:15,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:16,651 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:16,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2087597014] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:34:16,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206043344] [2021-11-13 02:34:16,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 02:34:16,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:34:16,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:34:16,664 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:34:16,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-13 02:34:16,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-13 02:34:16,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:34:16,715 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-13 02:34:16,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:19,524 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:19,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:22,654 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:22,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206043344] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:34:22,655 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 02:34:22,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28, 28, 29, 29] total 82 [2021-11-13 02:34:22,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596174600] [2021-11-13 02:34:22,656 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 02:34:22,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-11-13 02:34:22,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:34:22,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-11-13 02:34:22,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1741, Invalid=4901, Unknown=0, NotChecked=0, Total=6642 [2021-11-13 02:34:22,662 INFO L87 Difference]: Start difference. First operand 49 states and 64 transitions. Second operand has 82 states, 82 states have (on average 1.0731707317073171) internal successors, (88), 82 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:34:23,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:23,207 INFO L93 Difference]: Finished difference Result 96 states and 125 transitions. [2021-11-13 02:34:23,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-13 02:34:23,209 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.0731707317073171) internal successors, (88), 82 states have internal predecessors, (88), 0 states have call successors, (0), 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 [2021-11-13 02:34:23,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:23,211 INFO L225 Difference]: With dead ends: 96 [2021-11-13 02:34:23,212 INFO L226 Difference]: Without dead ends: 70 [2021-11-13 02:34:23,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 90 SyntacticMatches, 5 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3592 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=2019, Invalid=5463, Unknown=0, NotChecked=0, Total=7482 [2021-11-13 02:34:23,217 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 21 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 141.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.67ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 175.01ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:23,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 76 Invalid, 225 Unknown, 0 Unchecked, 1.67ms Time], IncrementalHoareTripleChecker [20 Valid, 171 Invalid, 0 Unknown, 34 Unchecked, 175.01ms Time] [2021-11-13 02:34:23,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-13 02:34:23,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-11-13 02:34:23,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.318840579710145) internal successors, (91), 69 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:34:23,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 91 transitions. [2021-11-13 02:34:23,229 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 91 transitions. Word has length 30 [2021-11-13 02:34:23,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:23,230 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 91 transitions. [2021-11-13 02:34:23,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.0731707317073171) internal successors, (88), 82 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:34:23,230 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 91 transitions. [2021-11-13 02:34:23,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-13 02:34:23,231 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:23,232 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:34:23,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:23,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:23,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:23,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:34:23,834 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:23,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:23,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1777786732, now seen corresponding path program 1 times [2021-11-13 02:34:23,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:34:23,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [949296651] [2021-11-13 02:34:23,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:23,836 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:34:23,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:34:23,837 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:34:23,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-13 02:34:23,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:23,871 WARN L261 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-13 02:34:23,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:25,359 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:25,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:29,074 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:29,074 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:34:29,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [949296651] [2021-11-13 02:34:29,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [949296651] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:34:29,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1447846713] [2021-11-13 02:34:29,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:29,075 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:34:29,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:34:29,076 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:34:29,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-13 02:34:29,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:29,188 WARN L261 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-13 02:34:29,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:29,819 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:29,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:30,514 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:30,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1447846713] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:34:30,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169090744] [2021-11-13 02:34:30,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:30,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:34:30,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:34:30,516 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:34:30,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-13 02:34:30,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:30,563 WARN L261 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-13 02:34:30,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:31,667 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:31,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:36,428 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:36,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169090744] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:34:36,433 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 02:34:36,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27, 27, 29, 29] total 80 [2021-11-13 02:34:36,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752150373] [2021-11-13 02:34:36,434 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 02:34:36,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-13 02:34:36,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:34:36,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-13 02:34:36,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1214, Invalid=5106, Unknown=0, NotChecked=0, Total=6320 [2021-11-13 02:34:36,439 INFO L87 Difference]: Start difference. First operand 70 states and 91 transitions. Second operand has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:35:30,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:35:30,418 INFO L93 Difference]: Finished difference Result 377 states and 478 transitions. [2021-11-13 02:35:30,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2021-11-13 02:35:30,418 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 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 [2021-11-13 02:35:30,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:35:30,423 INFO L225 Difference]: With dead ends: 377 [2021-11-13 02:35:30,424 INFO L226 Difference]: Without dead ends: 365 [2021-11-13 02:35:30,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 100 SyntacticMatches, 8 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20759 ImplicationChecksByTransitivity, 58.1s TimeCoverageRelationStatistics Valid=8413, Invalid=54337, Unknown=0, NotChecked=0, Total=62750 [2021-11-13 02:35:30,441 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 571 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 1969 mSolverCounterSat, 617 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3157.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 2867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.66ms SdHoareTripleChecker+Time, 617 IncrementalHoareTripleChecker+Valid, 1969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 281 IncrementalHoareTripleChecker+Unchecked, 3557.36ms IncrementalHoareTripleChecker+Time [2021-11-13 02:35:30,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [571 Valid, 166 Invalid, 2867 Unknown, 0 Unchecked, 16.66ms Time], IncrementalHoareTripleChecker [617 Valid, 1969 Invalid, 0 Unknown, 281 Unchecked, 3557.36ms Time] [2021-11-13 02:35:30,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-11-13 02:35:30,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 262. [2021-11-13 02:35:30,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.3524904214559388) internal successors, (353), 261 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:35:30,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 353 transitions. [2021-11-13 02:35:30,485 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 353 transitions. Word has length 30 [2021-11-13 02:35:30,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:35:30,486 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 353 transitions. [2021-11-13 02:35:30,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:35:30,486 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 353 transitions. [2021-11-13 02:35:30,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-13 02:35:30,489 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:35:30,489 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:35:30,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-13 02:35:30,698 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-13 02:35:30,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-13 02:35:31,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 02:35:31,090 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:35:31,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:35:31,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1894380496, now seen corresponding path program 2 times [2021-11-13 02:35:31,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:35:31,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [535166736] [2021-11-13 02:35:31,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 02:35:31,091 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:35:31,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:35:31,093 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:35:31,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-13 02:35:31,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 02:35:31,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:35:31,123 WARN L261 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-13 02:35:31,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:35:32,246 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:35:32,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:35:35,310 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:35:35,310 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:35:35,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [535166736] [2021-11-13 02:35:35,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [535166736] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:35:35,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [319970575] [2021-11-13 02:35:35,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 02:35:35,311 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:35:35,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:35:35,312 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:35:35,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-13 02:35:35,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 02:35:35,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:35:35,387 WARN L261 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-13 02:35:35,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:35:35,898 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:35:35,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:35:36,670 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:35:36,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [319970575] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:35:36,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502655501] [2021-11-13 02:35:36,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 02:35:36,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:35:36,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:35:36,683 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:35:36,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-13 02:35:36,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 02:35:36,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:35:36,723 WARN L261 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-13 02:35:36,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:35:37,467 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:35:37,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:35:42,318 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:35:42,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502655501] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:35:42,319 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 02:35:42,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27, 27, 29, 29] total 80 [2021-11-13 02:35:42,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396883440] [2021-11-13 02:35:42,319 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 02:35:42,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-13 02:35:42,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:35:42,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-13 02:35:42,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1164, Invalid=5156, Unknown=0, NotChecked=0, Total=6320 [2021-11-13 02:35:42,321 INFO L87 Difference]: Start difference. First operand 262 states and 353 transitions. Second operand has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:36:54,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:36:54,653 INFO L93 Difference]: Finished difference Result 469 states and 602 transitions. [2021-11-13 02:36:54,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2021-11-13 02:36:54,653 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 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 [2021-11-13 02:36:54,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:36:54,655 INFO L225 Difference]: With dead ends: 469 [2021-11-13 02:36:54,655 INFO L226 Difference]: Without dead ends: 410 [2021-11-13 02:36:54,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20021 ImplicationChecksByTransitivity, 76.1s TimeCoverageRelationStatistics Valid=10088, Invalid=54682, Unknown=0, NotChecked=0, Total=64770 [2021-11-13 02:36:54,662 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 606 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1974 mSolverCounterSat, 704 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2883.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 2853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.53ms SdHoareTripleChecker+Time, 704 IncrementalHoareTripleChecker+Valid, 1974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 175 IncrementalHoareTripleChecker+Unchecked, 3248.89ms IncrementalHoareTripleChecker+Time [2021-11-13 02:36:54,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [606 Valid, 118 Invalid, 2853 Unknown, 0 Unchecked, 13.53ms Time], IncrementalHoareTripleChecker [704 Valid, 1974 Invalid, 0 Unknown, 175 Unchecked, 3248.89ms Time] [2021-11-13 02:36:54,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-11-13 02:36:54,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 262. [2021-11-13 02:36:54,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.3448275862068966) internal successors, (351), 261 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:36:54,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 351 transitions. [2021-11-13 02:36:54,710 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 351 transitions. Word has length 30 [2021-11-13 02:36:54,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:36:54,710 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 351 transitions. [2021-11-13 02:36:54,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:36:54,711 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 351 transitions. [2021-11-13 02:36:54,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-13 02:36:54,713 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:36:54,713 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:36:54,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-13 02:36:54,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-13 02:36:55,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-13 02:36:55,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:36:55,315 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:36:55,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:36:55,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1978693868, now seen corresponding path program 3 times [2021-11-13 02:36:55,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:36:55,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1548903415] [2021-11-13 02:36:55,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 02:36:55,317 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:36:55,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:36:55,318 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:36:55,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-13 02:36:55,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-13 02:36:55,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:36:55,364 WARN L261 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-13 02:36:55,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:36:57,461 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:36:57,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:37:01,813 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:37:01,813 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:37:01,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1548903415] [2021-11-13 02:37:01,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1548903415] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:37:01,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [262998803] [2021-11-13 02:37:01,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 02:37:01,813 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:37:01,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:37:01,814 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:37:01,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-13 02:37:01,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-13 02:37:01,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:37:01,891 WARN L261 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-13 02:37:01,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:37:02,743 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:37:02,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:37:03,957 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:37:03,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [262998803] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:37:03,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604672600] [2021-11-13 02:37:03,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 02:37:03,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:37:03,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:37:03,959 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:37:03,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-13 02:37:04,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-13 02:37:04,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:37:04,020 WARN L261 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-13 02:37:04,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:37:06,980 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:37:06,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:37:10,274 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:37:10,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604672600] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:37:10,274 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 02:37:10,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28, 28, 29, 29] total 83 [2021-11-13 02:37:10,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119865099] [2021-11-13 02:37:10,275 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 02:37:10,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-11-13 02:37:10,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:37:10,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-11-13 02:37:10,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1407, Invalid=5399, Unknown=0, NotChecked=0, Total=6806 [2021-11-13 02:37:10,278 INFO L87 Difference]: Start difference. First operand 262 states and 351 transitions. Second operand has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 83 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) [2021-11-13 02:37:41,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:41,567 INFO L93 Difference]: Finished difference Result 496 states and 649 transitions. [2021-11-13 02:37:41,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-11-13 02:37:41,567 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 83 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 30 [2021-11-13 02:37:41,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:41,570 INFO L225 Difference]: With dead ends: 496 [2021-11-13 02:37:41,571 INFO L226 Difference]: Without dead ends: 444 [2021-11-13 02:37:41,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 9752 ImplicationChecksByTransitivity, 39.7s TimeCoverageRelationStatistics Valid=5931, Invalid=20801, Unknown=0, NotChecked=0, Total=26732 [2021-11-13 02:37:41,573 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 320 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 894.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.24ms SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 990 IncrementalHoareTripleChecker+Unchecked, 997.78ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:41,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 59 Invalid, 1847 Unknown, 0 Unchecked, 4.24ms Time], IncrementalHoareTripleChecker [275 Valid, 582 Invalid, 0 Unknown, 990 Unchecked, 997.78ms Time] [2021-11-13 02:37:41,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-11-13 02:37:41,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 296. [2021-11-13 02:37:41,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 1.335593220338983) internal successors, (394), 295 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:37:41,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 394 transitions. [2021-11-13 02:37:41,620 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 394 transitions. Word has length 30 [2021-11-13 02:37:41,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:41,621 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 394 transitions. [2021-11-13 02:37:41,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 83 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) [2021-11-13 02:37:41,621 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 394 transitions. [2021-11-13 02:37:41,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-13 02:37:41,622 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:41,623 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-11-13 02:37:41,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-13 02:37:41,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-13 02:37:42,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-13 02:37:42,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:37:42,230 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:42,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:42,230 INFO L85 PathProgramCache]: Analyzing trace with hash -2035952170, now seen corresponding path program 4 times [2021-11-13 02:37:42,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:37:42,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [142945507] [2021-11-13 02:37:42,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 02:37:42,231 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:37:42,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:37:42,232 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:37:42,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-13 02:37:42,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 02:37:42,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:37:42,265 WARN L261 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-13 02:37:42,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:37:43,418 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:37:43,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:37:46,697 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:37:46,697 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:37:46,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [142945507] [2021-11-13 02:37:46,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [142945507] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:37:46,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1423472494] [2021-11-13 02:37:46,698 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 02:37:46,699 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:37:46,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:37:46,702 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:37:46,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-13 02:37:46,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 02:37:46,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:37:46,777 WARN L261 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-13 02:37:46,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:37:47,568 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:37:47,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:37:48,443 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:37:48,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1423472494] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:37:48,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469764681] [2021-11-13 02:37:48,443 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 02:37:48,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:37:48,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:37:48,445 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:37:48,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-13 02:37:48,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 02:37:48,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:37:48,507 WARN L261 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-13 02:37:48,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:37:49,627 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:37:49,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:37:55,926 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:37:55,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469764681] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:37:55,927 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 02:37:55,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27, 27, 29, 29] total 80 [2021-11-13 02:37:55,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230041861] [2021-11-13 02:37:55,928 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 02:37:55,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-13 02:37:55,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:37:55,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-13 02:37:55,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1180, Invalid=5140, Unknown=0, NotChecked=0, Total=6320 [2021-11-13 02:37:55,931 INFO L87 Difference]: Start difference. First operand 296 states and 394 transitions. Second operand has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:38:56,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:38:56,457 INFO L93 Difference]: Finished difference Result 570 states and 729 transitions. [2021-11-13 02:38:56,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2021-11-13 02:38:56,457 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 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 [2021-11-13 02:38:56,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:38:56,461 INFO L225 Difference]: With dead ends: 570 [2021-11-13 02:38:56,461 INFO L226 Difference]: Without dead ends: 512 [2021-11-13 02:38:56,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13597 ImplicationChecksByTransitivity, 65.1s TimeCoverageRelationStatistics Valid=6695, Invalid=40177, Unknown=0, NotChecked=0, Total=46872 [2021-11-13 02:38:56,467 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 504 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 2111 mSolverCounterSat, 720 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3633.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 3035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.99ms SdHoareTripleChecker+Time, 720 IncrementalHoareTripleChecker+Valid, 2111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 4066.71ms IncrementalHoareTripleChecker+Time [2021-11-13 02:38:56,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 141 Invalid, 3035 Unknown, 0 Unchecked, 9.99ms Time], IncrementalHoareTripleChecker [720 Valid, 2111 Invalid, 0 Unknown, 204 Unchecked, 4066.71ms Time] [2021-11-13 02:38:56,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-11-13 02:38:56,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 332. [2021-11-13 02:38:56,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 1.3353474320241692) internal successors, (442), 331 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:38:56,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 442 transitions. [2021-11-13 02:38:56,521 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 442 transitions. Word has length 30 [2021-11-13 02:38:56,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:38:56,521 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 442 transitions. [2021-11-13 02:38:56,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:38:56,522 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 442 transitions. [2021-11-13 02:38:56,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-13 02:38:56,523 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:38:56,523 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-11-13 02:38:56,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-13 02:38:56,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-13 02:38:56,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-13 02:38:57,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 02:38:57,126 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:38:57,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:38:57,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1636215058, now seen corresponding path program 5 times [2021-11-13 02:38:57,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:38:57,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [90177556] [2021-11-13 02:38:57,127 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 02:38:57,127 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:38:57,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:38:57,128 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:38:57,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-13 02:38:57,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-13 02:38:57,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:38:57,158 WARN L261 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-13 02:38:57,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:38:58,688 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:38:58,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:39:03,295 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:39:03,295 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:39:03,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [90177556] [2021-11-13 02:39:03,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [90177556] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:39:03,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1371742455] [2021-11-13 02:39:03,296 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 02:39:03,296 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:39:03,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:39:03,297 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:39:03,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-13 02:39:03,374 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-13 02:39:03,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:39:03,376 WARN L261 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-13 02:39:03,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:39:04,034 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:39:04,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:39:05,337 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:39:05,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1371742455] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:39:05,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438341537] [2021-11-13 02:39:05,337 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 02:39:05,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:39:05,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:39:05,350 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:39:05,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-13 02:39:05,411 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-13 02:39:05,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:39:05,413 WARN L261 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-13 02:39:05,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:39:06,275 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:39:06,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:39:11,767 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:39:11,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438341537] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:39:11,768 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 02:39:11,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27, 27, 29, 29] total 80 [2021-11-13 02:39:11,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118256102] [2021-11-13 02:39:11,769 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 02:39:11,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-13 02:39:11,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:39:11,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-13 02:39:11,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1180, Invalid=5140, Unknown=0, NotChecked=0, Total=6320 [2021-11-13 02:39:11,771 INFO L87 Difference]: Start difference. First operand 332 states and 442 transitions. Second operand has 80 states, 80 states have (on average 1.1125) internal successors, (89), 80 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) [2021-11-13 02:40:17,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:40:17,357 INFO L93 Difference]: Finished difference Result 575 states and 744 transitions. [2021-11-13 02:40:17,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2021-11-13 02:40:17,358 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.1125) internal successors, (89), 80 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 30 [2021-11-13 02:40:17,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:40:17,361 INFO L225 Difference]: With dead ends: 575 [2021-11-13 02:40:17,361 INFO L226 Difference]: Without dead ends: 502 [2021-11-13 02:40:17,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12898 ImplicationChecksByTransitivity, 71.3s TimeCoverageRelationStatistics Valid=7129, Invalid=38453, Unknown=0, NotChecked=0, Total=45582 [2021-11-13 02:40:17,366 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 512 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 1657 mSolverCounterSat, 745 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3102.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 2608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.94ms SdHoareTripleChecker+Time, 745 IncrementalHoareTripleChecker+Valid, 1657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 206 IncrementalHoareTripleChecker+Unchecked, 3473.36ms IncrementalHoareTripleChecker+Time [2021-11-13 02:40:17,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [512 Valid, 86 Invalid, 2608 Unknown, 0 Unchecked, 8.94ms Time], IncrementalHoareTripleChecker [745 Valid, 1657 Invalid, 0 Unknown, 206 Unchecked, 3473.36ms Time] [2021-11-13 02:40:17,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-11-13 02:40:17,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 328. [2021-11-13 02:40:17,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 1.3333333333333333) internal successors, (436), 327 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:40:17,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 436 transitions. [2021-11-13 02:40:17,413 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 436 transitions. Word has length 30 [2021-11-13 02:40:17,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:40:17,413 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 436 transitions. [2021-11-13 02:40:17,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.1125) internal successors, (89), 80 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) [2021-11-13 02:40:17,414 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 436 transitions. [2021-11-13 02:40:17,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-13 02:40:17,415 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:40:17,415 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-11-13 02:40:17,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-13 02:40:17,639 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-11-13 02:40:17,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-13 02:40:18,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 02:40:18,030 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:40:18,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:40:18,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1578956756, now seen corresponding path program 6 times [2021-11-13 02:40:18,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:40:18,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1055127415] [2021-11-13 02:40:18,031 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 02:40:18,031 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:40:18,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:40:18,032 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:40:18,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-13 02:40:18,072 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-13 02:40:18,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:40:18,074 WARN L261 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-13 02:40:18,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:40:19,888 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:40:19,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:40:24,696 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:40:24,697 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:40:24,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1055127415] [2021-11-13 02:40:24,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1055127415] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:40:24,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1902273532] [2021-11-13 02:40:24,697 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 02:40:24,697 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:40:24,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:40:24,698 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:40:24,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-13 02:40:24,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-13 02:40:24,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:40:24,783 WARN L261 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-13 02:40:24,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:40:25,588 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:40:25,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:40:26,733 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:40:26,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1902273532] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:40:26,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298958653] [2021-11-13 02:40:26,734 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 02:40:26,734 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:40:26,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:40:26,735 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:40:26,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-13 02:40:26,795 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-13 02:40:26,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:40:26,798 WARN L261 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-13 02:40:26,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:40:28,492 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:40:28,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:40:34,260 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:40:34,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298958653] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:40:34,261 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 02:40:34,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28, 28, 29, 29] total 83 [2021-11-13 02:40:34,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239442402] [2021-11-13 02:40:34,261 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 02:40:34,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-11-13 02:40:34,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:40:34,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-11-13 02:40:34,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1274, Invalid=5532, Unknown=0, NotChecked=0, Total=6806 [2021-11-13 02:40:34,263 INFO L87 Difference]: Start difference. First operand 328 states and 436 transitions. Second operand has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 83 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) [2021-11-13 02:41:09,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:41:09,791 INFO L93 Difference]: Finished difference Result 507 states and 652 transitions. [2021-11-13 02:41:09,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-11-13 02:41:09,791 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 83 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 30 [2021-11-13 02:41:09,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:41:09,794 INFO L225 Difference]: With dead ends: 507 [2021-11-13 02:41:09,794 INFO L226 Difference]: Without dead ends: 438 [2021-11-13 02:41:09,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 7645 ImplicationChecksByTransitivity, 44.8s TimeCoverageRelationStatistics Valid=4544, Invalid=20262, Unknown=0, NotChecked=0, Total=24806 [2021-11-13 02:41:09,797 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 263 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1330.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 2310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.25ms SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1056 IncrementalHoareTripleChecker+Unchecked, 1491.07ms IncrementalHoareTripleChecker+Time [2021-11-13 02:41:09,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 123 Invalid, 2310 Unknown, 0 Unchecked, 5.25ms Time], IncrementalHoareTripleChecker [312 Valid, 942 Invalid, 0 Unknown, 1056 Unchecked, 1491.07ms Time] [2021-11-13 02:41:09,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-11-13 02:41:09,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 308. [2021-11-13 02:41:09,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 1.3355048859934853) internal successors, (410), 307 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:41:09,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 410 transitions. [2021-11-13 02:41:09,844 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 410 transitions. Word has length 30 [2021-11-13 02:41:09,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:41:09,844 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 410 transitions. [2021-11-13 02:41:09,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 83 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) [2021-11-13 02:41:09,844 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 410 transitions. [2021-11-13 02:41:09,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-13 02:41:09,845 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:41:09,845 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-11-13 02:41:09,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-13 02:41:10,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2021-11-13 02:41:10,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-13 02:41:10,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:41:10,446 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:41:10,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:41:10,447 INFO L85 PathProgramCache]: Analyzing trace with hash -497923054, now seen corresponding path program 7 times [2021-11-13 02:41:10,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:41:10,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [80072161] [2021-11-13 02:41:10,447 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 02:41:10,447 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:41:10,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:41:10,448 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:41:10,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-13 02:41:10,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:41:10,479 WARN L261 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-13 02:41:10,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:41:11,721 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:41:11,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:41:15,287 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:41:15,287 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:41:15,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [80072161] [2021-11-13 02:41:15,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [80072161] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:41:15,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1567063806] [2021-11-13 02:41:15,288 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 02:41:15,288 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:41:15,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:41:15,297 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:41:15,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-13 02:41:15,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:41:15,356 WARN L261 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-13 02:41:15,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:41:15,921 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:41:15,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:41:16,717 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:41:16,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1567063806] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:41:16,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961773760] [2021-11-13 02:41:16,717 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 02:41:16,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:41:16,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:41:16,718 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:41:16,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-13 02:41:16,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:41:16,752 WARN L261 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-13 02:41:16,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:41:17,572 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:41:17,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:41:23,175 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:41:23,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961773760] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:41:23,175 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 02:41:23,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27, 27, 29, 29] total 80 [2021-11-13 02:41:23,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259199686] [2021-11-13 02:41:23,176 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 02:41:23,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-13 02:41:23,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:41:23,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-13 02:41:23,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1181, Invalid=5139, Unknown=0, NotChecked=0, Total=6320 [2021-11-13 02:41:23,178 INFO L87 Difference]: Start difference. First operand 308 states and 410 transitions. Second operand has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:42:44,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:42:44,474 INFO L93 Difference]: Finished difference Result 758 states and 980 transitions. [2021-11-13 02:42:44,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2021-11-13 02:42:44,474 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 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 [2021-11-13 02:42:44,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:42:44,478 INFO L225 Difference]: With dead ends: 758 [2021-11-13 02:42:44,478 INFO L226 Difference]: Without dead ends: 707 [2021-11-13 02:42:44,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21518 ImplicationChecksByTransitivity, 85.0s TimeCoverageRelationStatistics Valid=10117, Invalid=59843, Unknown=0, NotChecked=0, Total=69960 [2021-11-13 02:42:44,483 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 550 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 2492 mSolverCounterSat, 827 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4017.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 3580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.87ms SdHoareTripleChecker+Time, 827 IncrementalHoareTripleChecker+Valid, 2492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 261 IncrementalHoareTripleChecker+Unchecked, 4477.84ms IncrementalHoareTripleChecker+Time [2021-11-13 02:42:44,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [550 Valid, 127 Invalid, 3580 Unknown, 0 Unchecked, 10.87ms Time], IncrementalHoareTripleChecker [827 Valid, 2492 Invalid, 0 Unknown, 261 Unchecked, 4477.84ms Time] [2021-11-13 02:42:44,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-11-13 02:42:44,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 452. [2021-11-13 02:42:44,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 1.3481152993348116) internal successors, (608), 451 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:42:44,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 608 transitions. [2021-11-13 02:42:44,572 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 608 transitions. Word has length 30 [2021-11-13 02:42:44,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:42:44,573 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 608 transitions. [2021-11-13 02:42:44,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:42:44,573 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 608 transitions. [2021-11-13 02:42:44,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-13 02:42:44,574 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:42:44,574 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-11-13 02:42:44,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-13 02:42:44,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-13 02:42:44,997 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-11-13 02:42:45,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:42:45,176 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:42:45,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:42:45,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1120723122, now seen corresponding path program 8 times [2021-11-13 02:42:45,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:42:45,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [15687983] [2021-11-13 02:42:45,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 02:42:45,177 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:42:45,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:42:45,178 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:42:45,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-13 02:42:45,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 02:42:45,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:42:45,214 WARN L261 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-13 02:42:45,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:42:46,479 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:42:46,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:42:50,525 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:42:50,525 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:42:50,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [15687983] [2021-11-13 02:42:50,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [15687983] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:42:50,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1652393756] [2021-11-13 02:42:50,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 02:42:50,526 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:42:50,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:42:50,527 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:42:50,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-13 02:42:50,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 02:42:50,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:42:50,596 WARN L261 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-13 02:42:50,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:42:51,154 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:42:51,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:42:51,853 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:42:51,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1652393756] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:42:51,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812008177] [2021-11-13 02:42:51,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 02:42:51,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:42:51,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:42:51,854 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:42:51,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-13 02:42:51,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 02:42:51,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:42:51,894 WARN L261 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-13 02:42:51,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:42:52,715 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:42:52,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:42:58,746 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:42:58,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812008177] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:42:58,746 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 02:42:58,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27, 27, 29, 29] total 80 [2021-11-13 02:42:58,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713180958] [2021-11-13 02:42:58,747 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 02:42:58,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-13 02:42:58,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:42:58,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-13 02:42:58,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1157, Invalid=5163, Unknown=0, NotChecked=0, Total=6320 [2021-11-13 02:42:58,750 INFO L87 Difference]: Start difference. First operand 452 states and 608 transitions. Second operand has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:44:22,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:44:22,455 INFO L93 Difference]: Finished difference Result 782 states and 1023 transitions. [2021-11-13 02:44:22,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2021-11-13 02:44:22,456 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 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 [2021-11-13 02:44:22,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:44:22,459 INFO L225 Difference]: With dead ends: 782 [2021-11-13 02:44:22,460 INFO L226 Difference]: Without dead ends: 701 [2021-11-13 02:44:22,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16804 ImplicationChecksByTransitivity, 88.7s TimeCoverageRelationStatistics Valid=8983, Invalid=47899, Unknown=0, NotChecked=0, Total=56882 [2021-11-13 02:44:22,464 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 409 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 2010 mSolverCounterSat, 675 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3577.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 2830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.77ms SdHoareTripleChecker+Time, 675 IncrementalHoareTripleChecker+Valid, 2010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 3987.34ms IncrementalHoareTripleChecker+Time [2021-11-13 02:44:22,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 164 Invalid, 2830 Unknown, 0 Unchecked, 9.77ms Time], IncrementalHoareTripleChecker [675 Valid, 2010 Invalid, 0 Unknown, 145 Unchecked, 3987.34ms Time] [2021-11-13 02:44:22,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2021-11-13 02:44:22,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 485. [2021-11-13 02:44:22,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 1.3367768595041323) internal successors, (647), 484 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:44:22,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 647 transitions. [2021-11-13 02:44:22,570 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 647 transitions. Word has length 30 [2021-11-13 02:44:22,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:44:22,570 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 647 transitions. [2021-11-13 02:44:22,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:44:22,571 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 647 transitions. [2021-11-13 02:44:22,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-13 02:44:22,572 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:44:22,572 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-11-13 02:44:22,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2021-11-13 02:44:22,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-13 02:44:23,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-13 02:44:23,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:44:23,175 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:44:23,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:44:23,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1378888560, now seen corresponding path program 9 times [2021-11-13 02:44:23,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:44:23,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1436729019] [2021-11-13 02:44:23,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 02:44:23,177 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:44:23,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:44:23,177 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:44:23,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-13 02:44:23,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-13 02:44:23,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:44:23,225 WARN L261 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-13 02:44:23,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:44:26,234 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 3 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:44:26,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:44:32,367 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:44:32,367 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:44:32,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1436729019] [2021-11-13 02:44:32,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1436729019] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:44:32,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [828410072] [2021-11-13 02:44:32,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 02:44:32,368 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:44:32,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:44:32,369 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:44:32,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-11-13 02:44:32,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-13 02:44:32,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:44:32,469 WARN L261 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-13 02:44:32,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:44:33,594 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 3 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:44:33,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:44:35,062 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:44:35,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [828410072] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:44:35,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434532988] [2021-11-13 02:44:35,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 02:44:35,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:44:35,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:44:35,063 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:44:35,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-13 02:44:35,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-13 02:44:35,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:44:35,119 WARN L261 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-13 02:44:35,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:44:38,592 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:44:38,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:44:43,296 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:44:43,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434532988] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:44:43,296 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 02:44:43,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28, 28, 29, 29] total 83 [2021-11-13 02:44:43,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904718333] [2021-11-13 02:44:43,297 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 02:44:43,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-11-13 02:44:43,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:44:43,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-11-13 02:44:43,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=5426, Unknown=0, NotChecked=0, Total=6806 [2021-11-13 02:44:43,299 INFO L87 Difference]: Start difference. First operand 485 states and 647 transitions. Second operand has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 83 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) [2021-11-13 02:45:41,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:45:41,845 INFO L93 Difference]: Finished difference Result 932 states and 1222 transitions. [2021-11-13 02:45:41,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-11-13 02:45:41,846 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 83 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 30 [2021-11-13 02:45:41,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:45:41,852 INFO L225 Difference]: With dead ends: 932 [2021-11-13 02:45:41,852 INFO L226 Difference]: Without dead ends: 889 [2021-11-13 02:45:41,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 13319 ImplicationChecksByTransitivity, 70.3s TimeCoverageRelationStatistics Valid=7617, Invalid=30995, Unknown=0, NotChecked=0, Total=38612 [2021-11-13 02:45:41,855 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 320 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1108.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.81ms SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1682 IncrementalHoareTripleChecker+Unchecked, 1237.82ms IncrementalHoareTripleChecker+Time [2021-11-13 02:45:41,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 58 Invalid, 2665 Unknown, 0 Unchecked, 4.81ms Time], IncrementalHoareTripleChecker [317 Valid, 666 Invalid, 0 Unknown, 1682 Unchecked, 1237.82ms Time] [2021-11-13 02:45:41,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2021-11-13 02:45:42,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 657. [2021-11-13 02:45:42,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 1.3399390243902438) internal successors, (879), 656 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:45:42,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 879 transitions. [2021-11-13 02:45:42,011 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 879 transitions. Word has length 30 [2021-11-13 02:45:42,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:45:42,012 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 879 transitions. [2021-11-13 02:45:42,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 83 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) [2021-11-13 02:45:42,012 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 879 transitions. [2021-11-13 02:45:42,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-13 02:45:42,013 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:45:42,014 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 1, 1, 1, 1, 1, 1] [2021-11-13 02:45:42,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2021-11-13 02:45:42,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-13 02:45:42,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-13 02:45:42,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:45:42,617 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:45:42,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:45:42,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1436146862, now seen corresponding path program 10 times [2021-11-13 02:45:42,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:45:42,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [417261875] [2021-11-13 02:45:42,619 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 02:45:42,619 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:45:42,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:45:42,620 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:45:42,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-13 02:45:42,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 02:45:42,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:45:42,665 WARN L261 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-13 02:45:42,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:45:44,076 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:45:44,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:45:48,832 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:45:48,832 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:45:48,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [417261875] [2021-11-13 02:45:48,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [417261875] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:45:48,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1452589559] [2021-11-13 02:45:48,832 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 02:45:48,833 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:45:48,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:45:48,834 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:45:48,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2021-11-13 02:45:48,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 02:45:48,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:45:48,912 WARN L261 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-13 02:45:48,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:45:49,524 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:45:49,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:45:50,310 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:45:50,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1452589559] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:45:50,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098874618] [2021-11-13 02:45:50,311 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 02:45:50,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:45:50,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:45:50,312 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:45:50,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_251bca05-10f8-42cc-8db1-9e9ec8e6909a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-13 02:45:50,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 02:45:50,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:45:50,349 WARN L261 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-13 02:45:50,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:45:51,274 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:45:51,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:45:58,481 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:45:58,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098874618] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:45:58,481 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 02:45:58,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27, 27, 29, 29] total 80 [2021-11-13 02:45:58,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666435480] [2021-11-13 02:45:58,481 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 02:45:58,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-13 02:45:58,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:45:58,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-13 02:45:58,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1157, Invalid=5163, Unknown=0, NotChecked=0, Total=6320 [2021-11-13 02:45:58,483 INFO L87 Difference]: Start difference. First operand 657 states and 879 transitions. Second operand has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)