./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-pthread/cs_stack-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-pthread/cs_stack-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7 --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 f673ebb9e7e04aacff207de4acfe748a76999a1319247236c14ae51e44f23889 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:14:43,083 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:14:43,088 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:14:43,162 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:14:43,162 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:14:43,168 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:14:43,171 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:14:43,176 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:14:43,179 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:14:43,186 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:14:43,187 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:14:43,189 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:14:43,190 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:14:43,193 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:14:43,196 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:14:43,201 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:14:43,203 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:14:43,205 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:14:43,208 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:14:43,218 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:14:43,220 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:14:43,223 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:14:43,226 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:14:43,228 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:14:43,233 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:14:43,233 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:14:43,234 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:14:43,236 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:14:43,237 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:14:43,239 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:14:43,239 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:14:43,241 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:14:43,243 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:14:43,245 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:14:43,247 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:14:43,247 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:14:43,248 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:14:43,248 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:14:43,249 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:14:43,250 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:14:43,251 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:14:43,252 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:14:43,306 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:14:43,306 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:14:43,307 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:14:43,307 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:14:43,308 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:14:43,309 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:14:43,309 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:14:43,309 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:14:43,309 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:14:43,310 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:14:43,311 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:14:43,311 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:14:43,312 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:14:43,312 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:14:43,312 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:14:43,313 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:14:43,313 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:14:43,313 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:14:43,314 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:14:43,314 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:14:43,315 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:14:43,315 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:14:43,315 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:14:43,316 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:14:43,316 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:14:43,316 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:14:43,318 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:14:43,319 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:14:43,319 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:14:43,319 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:14:43,320 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:14:43,320 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:14:43,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:14:43,321 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:14:43,321 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:14:43,321 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:14:43,322 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:14:43,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:14:43,322 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:14:43,322 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:14:43,323 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:14:43,323 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_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f673ebb9e7e04aacff207de4acfe748a76999a1319247236c14ae51e44f23889 [2021-11-25 19:14:43,661 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:14:43,687 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:14:43,690 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:14:43,691 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:14:43,692 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:14:43,694 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/seq-pthread/cs_stack-1.i [2021-11-25 19:14:43,773 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/data/fe55bb52d/f0a88645a9c046228dcfcacfdd9b64db/FLAGb0ec4686f [2021-11-25 19:14:44,503 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:14:44,504 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/sv-benchmarks/c/seq-pthread/cs_stack-1.i [2021-11-25 19:14:44,527 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/data/fe55bb52d/f0a88645a9c046228dcfcacfdd9b64db/FLAGb0ec4686f [2021-11-25 19:14:44,673 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/data/fe55bb52d/f0a88645a9c046228dcfcacfdd9b64db [2021-11-25 19:14:44,677 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:14:44,679 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:14:44,681 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:14:44,681 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:14:44,685 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:14:44,686 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:14:44" (1/1) ... [2021-11-25 19:14:44,688 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d31a155 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:14:44, skipping insertion in model container [2021-11-25 19:14:44,688 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:14:44" (1/1) ... [2021-11-25 19:14:44,724 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:14:44,820 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:14:45,437 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/sv-benchmarks/c/seq-pthread/cs_stack-1.i[34744,34757] [2021-11-25 19:14:45,648 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:14:45,667 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:14:45,708 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/sv-benchmarks/c/seq-pthread/cs_stack-1.i[34744,34757] [2021-11-25 19:14:45,799 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:14:45,886 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:14:45,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:14:45 WrapperNode [2021-11-25 19:14:45,887 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:14:45,888 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:14:45,889 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:14:45,889 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:14:45,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:14:45" (1/1) ... [2021-11-25 19:14:45,931 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:14:45" (1/1) ... [2021-11-25 19:14:45,997 INFO L137 Inliner]: procedures = 254, calls = 276, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 640 [2021-11-25 19:14:45,998 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:14:45,999 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:14:45,999 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:14:45,999 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:14:46,011 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:14:45" (1/1) ... [2021-11-25 19:14:46,021 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:14:45" (1/1) ... [2021-11-25 19:14:46,032 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:14:45" (1/1) ... [2021-11-25 19:14:46,040 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:14:45" (1/1) ... [2021-11-25 19:14:46,086 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:14:45" (1/1) ... [2021-11-25 19:14:46,117 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:14:45" (1/1) ... [2021-11-25 19:14:46,137 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:14:45" (1/1) ... [2021-11-25 19:14:46,147 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:14:46,161 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:14:46,161 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:14:46,162 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:14:46,163 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:14:45" (1/1) ... [2021-11-25 19:14:46,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:14:46,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:14:46,219 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:14:46,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:14:46,283 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-25 19:14:46,284 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-25 19:14:46,284 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 19:14:46,284 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_mutex_lock [2021-11-25 19:14:46,284 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_mutex_lock [2021-11-25 19:14:46,285 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 19:14:46,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 19:14:46,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 19:14:46,285 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_mutex_unlock [2021-11-25 19:14:46,285 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_mutex_unlock [2021-11-25 19:14:46,286 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 19:14:46,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 19:14:46,286 INFO L130 BoogieDeclarations]: Found specification of procedure get_top [2021-11-25 19:14:46,286 INFO L138 BoogieDeclarations]: Found implementation of procedure get_top [2021-11-25 19:14:46,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:14:46,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 19:14:46,287 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_create [2021-11-25 19:14:46,287 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_create [2021-11-25 19:14:46,287 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_join [2021-11-25 19:14:46,287 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_join [2021-11-25 19:14:46,288 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~$Pointer$ [2021-11-25 19:14:46,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~$Pointer$ [2021-11-25 19:14:46,288 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-11-25 19:14:46,288 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-11-25 19:14:46,288 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_cs [2021-11-25 19:14:46,289 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_cs [2021-11-25 19:14:46,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:14:46,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:14:46,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:14:46,555 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:14:46,557 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:14:46,630 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !(0 != ~__CS_ret~0 % 256); [2021-11-25 19:14:46,630 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume 0 != ~__CS_ret~0 % 256;#res := 0; [2021-11-25 19:14:46,679 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##8: assume !(0 != ~__CS_ret~0 % 256); [2021-11-25 19:14:46,679 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##9: assume 0 != ~__CS_ret~0 % 256; [2021-11-25 19:14:46,679 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##7: assume 0 != ~__CS_ret~0 % 256; [2021-11-25 19:14:46,680 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !(0 != ~__CS_ret~0 % 256); [2021-11-25 19:14:46,680 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !(0 != ~__CS_ret~0 % 256); [2021-11-25 19:14:46,680 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L933: SUMMARY for call __CS_cs(); srcloc: null [2021-11-25 19:14:46,680 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L933-1: assume 0 != ~__CS_ret~0 % 256; [2021-11-25 19:14:46,680 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L933-1: assume !(0 != ~__CS_ret~0 % 256); [2021-11-25 19:14:46,681 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume 0 != ~__CS_ret~0 % 256; [2021-11-25 19:14:47,151 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##97: assume !(0 != ~__CS_ret~0 % 256); [2021-11-25 19:14:47,151 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##96: assume 0 != ~__CS_ret~0 % 256;push_#res#1 := 0; [2021-11-25 19:14:47,151 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##54: assume !(0 != ~__CS_ret~0 % 256); [2021-11-25 19:14:47,151 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##53: assume 0 != ~__CS_ret~0 % 256;pop_#res#1 := 0; [2021-11-25 19:14:47,152 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##58: assume !(0 != ~__CS_ret~0 % 256); [2021-11-25 19:14:47,152 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##57: assume 0 != ~__CS_ret~0 % 256;pop_#res#1 := 0; [2021-11-25 19:14:47,152 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##43: assume !(0 != ~__CS_ret~0 % 256); [2021-11-25 19:14:47,152 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##42: assume 0 != ~__CS_ret~0 % 256;pop_#res#1 := 0; [2021-11-25 19:14:47,152 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L1005: assume 0 != ~__CS_ret~0 % 256;pop_#res#1 := 0; [2021-11-25 19:14:47,153 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L1005: assume !(0 != ~__CS_ret~0 % 256);pop_#res#1 := 0; [2021-11-25 19:14:47,153 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L989-2: SUMMARY for call __CS_cs(); srcloc: null [2021-11-25 19:14:47,153 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##111: assume 0 != ~__CS_ret~0 % 256;push_#res#1 := 0; [2021-11-25 19:14:47,153 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##112: assume !(0 != ~__CS_ret~0 % 256); [2021-11-25 19:14:49,658 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:14:49,793 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:14:49,793 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-25 19:14:49,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:14:49 BoogieIcfgContainer [2021-11-25 19:14:49,797 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:14:49,799 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:14:49,799 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:14:49,803 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:14:49,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:14:44" (1/3) ... [2021-11-25 19:14:49,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@733f47c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:14:49, skipping insertion in model container [2021-11-25 19:14:49,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:14:45" (2/3) ... [2021-11-25 19:14:49,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@733f47c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:14:49, skipping insertion in model container [2021-11-25 19:14:49,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:14:49" (3/3) ... [2021-11-25 19:14:49,807 INFO L111 eAbstractionObserver]: Analyzing ICFG cs_stack-1.i [2021-11-25 19:14:49,814 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:14:49,814 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:14:49,895 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:14:49,907 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 [2021-11-25 19:14:49,907 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:14:49,937 INFO L276 IsEmpty]: Start isEmpty. Operand has 195 states, 111 states have (on average 1.4594594594594594) internal successors, (162), 114 states have internal predecessors, (162), 73 states have call successors, (73), 9 states have call predecessors, (73), 9 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2021-11-25 19:14:49,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-25 19:14:49,960 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:14:49,961 INFO L514 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:14:49,962 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:14:49,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:14:49,968 INFO L85 PathProgramCache]: Analyzing trace with hash -827068576, now seen corresponding path program 1 times [2021-11-25 19:14:49,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:14:49,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090687581] [2021-11-25 19:14:49,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:14:49,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:14:54,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:14:57,091 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-11-25 19:14:57,092 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:14:57,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090687581] [2021-11-25 19:14:57,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090687581] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:14:57,094 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:14:57,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:14:57,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370499035] [2021-11-25 19:14:57,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:14:57,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:14:57,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:14:57,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:14:57,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:14:57,140 INFO L87 Difference]: Start difference. First operand has 195 states, 111 states have (on average 1.4594594594594594) internal successors, (162), 114 states have internal predecessors, (162), 73 states have call successors, (73), 9 states have call predecessors, (73), 9 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-25 19:14:59,210 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:14:59,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:14:59,509 INFO L93 Difference]: Finished difference Result 389 states and 615 transitions. [2021-11-25 19:14:59,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:14:59,512 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) Word has length 66 [2021-11-25 19:14:59,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:14:59,528 INFO L225 Difference]: With dead ends: 389 [2021-11-25 19:14:59,528 INFO L226 Difference]: Without dead ends: 196 [2021-11-25 19:14:59,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:14:59,541 INFO L933 BasicCegarLoop]: 274 mSDtfsCounter, 4 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:14:59,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 548 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-25 19:14:59,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-25 19:14:59,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 194. [2021-11-25 19:14:59,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 111 states have (on average 1.4414414414414414) internal successors, (160), 113 states have internal predecessors, (160), 73 states have call successors, (73), 9 states have call predecessors, (73), 9 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2021-11-25 19:14:59,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 306 transitions. [2021-11-25 19:14:59,696 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 306 transitions. Word has length 66 [2021-11-25 19:14:59,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:14:59,696 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 306 transitions. [2021-11-25 19:14:59,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-25 19:14:59,697 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 306 transitions. [2021-11-25 19:14:59,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-25 19:14:59,708 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:14:59,708 INFO L514 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:14:59,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:14:59,709 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:14:59,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:14:59,710 INFO L85 PathProgramCache]: Analyzing trace with hash -539118748, now seen corresponding path program 1 times [2021-11-25 19:14:59,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:14:59,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626655313] [2021-11-25 19:14:59,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:14:59,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:15:03,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:15:03,567 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-11-25 19:15:03,567 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:15:03,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626655313] [2021-11-25 19:15:03,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626655313] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:15:03,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:15:03,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:15:03,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339315730] [2021-11-25 19:15:03,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:15:03,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:15:03,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:15:03,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:15:03,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:15:03,573 INFO L87 Difference]: Start difference. First operand 194 states and 306 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-25 19:15:05,629 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:15:05,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:15:05,831 INFO L93 Difference]: Finished difference Result 388 states and 614 transitions. [2021-11-25 19:15:05,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:15:05,832 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) Word has length 69 [2021-11-25 19:15:05,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:15:05,836 INFO L225 Difference]: With dead ends: 388 [2021-11-25 19:15:05,836 INFO L226 Difference]: Without dead ends: 196 [2021-11-25 19:15:05,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:15:05,843 INFO L933 BasicCegarLoop]: 274 mSDtfsCounter, 0 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:15:05,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 547 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-11-25 19:15:05,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-25 19:15:05,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2021-11-25 19:15:05,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 113 states have (on average 1.4336283185840708) internal successors, (162), 115 states have internal predecessors, (162), 73 states have call successors, (73), 9 states have call predecessors, (73), 9 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2021-11-25 19:15:05,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 308 transitions. [2021-11-25 19:15:05,879 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 308 transitions. Word has length 69 [2021-11-25 19:15:05,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:15:05,880 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 308 transitions. [2021-11-25 19:15:05,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-25 19:15:05,880 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 308 transitions. [2021-11-25 19:15:05,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-25 19:15:05,886 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:15:05,886 INFO L514 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:15:05,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 19:15:05,887 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:15:05,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:15:05,888 INFO L85 PathProgramCache]: Analyzing trace with hash -964957126, now seen corresponding path program 1 times [2021-11-25 19:15:05,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:15:05,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775305495] [2021-11-25 19:15:05,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:15:05,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:15:07,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:15:07,799 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2021-11-25 19:15:07,800 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:15:07,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775305495] [2021-11-25 19:15:07,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775305495] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:15:07,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696264171] [2021-11-25 19:15:07,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:15:07,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:15:07,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:15:07,804 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:15:07,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:15:15,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:15:15,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 16925 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:15:15,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:15:15,849 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2021-11-25 19:15:15,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:15:16,098 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2021-11-25 19:15:16,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696264171] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:15:16,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [767844126] [2021-11-25 19:15:16,122 INFO L159 IcfgInterpreter]: Started Sifa with 43 locations of interest [2021-11-25 19:15:16,122 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:15:16,127 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:15:16,146 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:15:16,147 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:15:16,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 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 [2021-11-25 19:15:16,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 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 [2021-11-25 19:15:16,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-25 19:15:16,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-25 19:15:16,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:16,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:16,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:16,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:19,007 INFO L354 Elim1Store]: treesize reduction 1272, result has 18.5 percent of original size [2021-11-25 19:15:19,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 19 select indices, 19 select index equivalence classes, 113 disjoint index pairs (out of 171 index pairs), introduced 19 new quantified variables, introduced 77 case distinctions, treesize of input 135 treesize of output 385 [2021-11-25 19:15:19,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-25 19:15:19,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:19,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:19,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:19,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 45 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 192 treesize of output 189 [2021-11-25 19:15:19,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:19,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:19,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:19,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:19,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 14 select indices, 14 select index equivalence classes, 159 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 133 [2021-11-25 19:15:19,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 45 disjoint index pairs (out of 45 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 274 treesize of output 235 [2021-11-25 19:15:19,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:19,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 63 disjoint index pairs (out of 55 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 222 treesize of output 216 [2021-11-25 19:15:20,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:20,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:20,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 80 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 212 treesize of output 216 [2021-11-25 19:15:20,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-11-25 19:15:20,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:20,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:20,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:15:20,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 27 [2021-11-25 19:15:20,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-11-25 19:15:20,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:20,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:20,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:20,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:20,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:20,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:20,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:20,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:20,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:20,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:20,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:20,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:20,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:20,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:20,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:20,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 49 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 91 [2021-11-25 19:15:20,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:20,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:20,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:20,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:20,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:20,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:20,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:20,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:20,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:20,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:20,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:20,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:20,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:20,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:20,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:20,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 49 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 91 [2021-11-25 19:15:21,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:21,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 63 disjoint index pairs (out of 55 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 257 treesize of output 245 [2021-11-25 19:15:21,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-11-25 19:15:21,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:21,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 63 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 233 treesize of output 230 [2021-11-25 19:15:21,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-11-25 19:15:21,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:21,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:21,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:21,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:21,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:21,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:21,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:21,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:21,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:21,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:21,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:21,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:21,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:21,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:21,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:21,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 48 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 106 [2021-11-25 19:15:21,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:21,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:21,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:21,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:21,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:21,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:21,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:21,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:21,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:21,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:21,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:21,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:21,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:21,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:21,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:21,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 48 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 93 [2021-11-25 19:15:23,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:23,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:23,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:23,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:23,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:23,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:23,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:23,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:23,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:23,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:23,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:23,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:23,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:23,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:23,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:23,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:23,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:23,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:23,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:23,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:23,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:23,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:23,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:23,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:23,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:23,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:23,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:23,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:23,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:23,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:23,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:23,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:23,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:23,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:23,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:23,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:23,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:23,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:23,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:23,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:23,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:23,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:23,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:23,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:23,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:23,519 INFO L244 Elim1Store]: Index analysis took 143 ms [2021-11-25 19:15:24,013 INFO L354 Elim1Store]: treesize reduction 310, result has 14.1 percent of original size [2021-11-25 19:15:24,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 45 disjoint index pairs (out of 55 index pairs), introduced 12 new quantified variables, introduced 20 case distinctions, treesize of input 1940 treesize of output 1876 [2021-11-25 19:15:24,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:24,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:24,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:24,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:24,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:24,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:24,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:24,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:24,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:24,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:24,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:24,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:24,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:24,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:24,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:24,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:24,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:24,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:24,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:24,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:24,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:24,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:24,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:24,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:15:24,369 INFO L354 Elim1Store]: treesize reduction 112, result has 14.5 percent of original size [2021-11-25 19:15:24,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 1903 treesize of output 1863 [2021-11-25 19:15:24,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:24,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:24,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:24,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:24,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:24,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:24,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:24,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:24,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:24,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:24,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:24,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:24,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:24,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:24,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:24,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:24,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:24,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:24,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:24,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:24,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:24,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:15:24,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:15:24,687 INFO L354 Elim1Store]: treesize reduction 112, result has 14.5 percent of original size [2021-11-25 19:15:24,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 1890 treesize of output 1850 [2021-11-25 19:15:24,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:15:25,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:15:25,029 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Should have been eliminated by DER at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:108) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:353) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:184) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne3(DualJunctionSaa.java:166) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne2(DualJunctionSaa.java:154) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne1(DualJunctionSaa.java:142) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne0(DualJunctionSaa.java:126) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:110) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:95) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:90) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:903) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:865) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:783) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:425) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:162) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:243) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:233) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:119) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpretForSingleMarker(DagInterpreter.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarizeInternal(FixpointLoopSummarizer.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:98) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 19:15:25,036 INFO L158 Benchmark]: Toolchain (without parser) took 40357.32ms. Allocated memory was 81.8MB in the beginning and 3.4GB in the end (delta: 3.3GB). Free memory was 42.5MB in the beginning and 3.0GB in the end (delta: -2.9GB). Peak memory consumption was 882.1MB. Max. memory is 16.1GB. [2021-11-25 19:15:25,037 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 81.8MB. Free memory was 60.7MB in the beginning and 60.6MB in the end (delta: 39.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 19:15:25,037 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1206.86ms. Allocated memory was 81.8MB in the beginning and 121.6MB in the end (delta: 39.8MB). Free memory was 42.2MB in the beginning and 72.5MB in the end (delta: -30.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-25 19:15:25,037 INFO L158 Benchmark]: Boogie Procedure Inliner took 109.77ms. Allocated memory is still 121.6MB. Free memory was 72.5MB in the beginning and 67.6MB in the end (delta: 4.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-25 19:15:25,038 INFO L158 Benchmark]: Boogie Preprocessor took 161.22ms. Allocated memory is still 121.6MB. Free memory was 67.6MB in the beginning and 62.4MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-25 19:15:25,038 INFO L158 Benchmark]: RCFGBuilder took 3636.34ms. Allocated memory is still 121.6MB. Free memory was 62.4MB in the beginning and 58.5MB in the end (delta: 3.9MB). Peak memory consumption was 28.0MB. Max. memory is 16.1GB. [2021-11-25 19:15:25,038 INFO L158 Benchmark]: TraceAbstraction took 35236.27ms. Allocated memory was 121.6MB in the beginning and 3.4GB in the end (delta: 3.2GB). Free memory was 57.9MB in the beginning and 3.0GB in the end (delta: -2.9GB). Peak memory consumption was 858.4MB. Max. memory is 16.1GB. [2021-11-25 19:15:25,041 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 81.8MB. Free memory was 60.7MB in the beginning and 60.6MB in the end (delta: 39.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1206.86ms. Allocated memory was 81.8MB in the beginning and 121.6MB in the end (delta: 39.8MB). Free memory was 42.2MB in the beginning and 72.5MB in the end (delta: -30.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 109.77ms. Allocated memory is still 121.6MB. Free memory was 72.5MB in the beginning and 67.6MB in the end (delta: 4.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 161.22ms. Allocated memory is still 121.6MB. Free memory was 67.6MB in the beginning and 62.4MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * RCFGBuilder took 3636.34ms. Allocated memory is still 121.6MB. Free memory was 62.4MB in the beginning and 58.5MB in the end (delta: 3.9MB). Peak memory consumption was 28.0MB. Max. memory is 16.1GB. * TraceAbstraction took 35236.27ms. Allocated memory was 121.6MB in the beginning and 3.4GB in the end (delta: 3.2GB). Free memory was 57.9MB in the beginning and 3.0GB in the end (delta: -2.9GB). Peak memory consumption was 858.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Should have been eliminated by DER de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Should have been eliminated by DER: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:108) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-25 19:15:25,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, 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_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-pthread/cs_stack-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7 --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 f673ebb9e7e04aacff207de4acfe748a76999a1319247236c14ae51e44f23889 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:15:27,849 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:15:27,851 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:15:27,887 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:15:27,888 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:15:27,890 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:15:27,892 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:15:27,894 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:15:27,897 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:15:27,898 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:15:27,900 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:15:27,901 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:15:27,902 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:15:27,903 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:15:27,905 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:15:27,907 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:15:27,909 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:15:27,910 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:15:27,912 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:15:27,916 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:15:27,918 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:15:27,920 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:15:27,922 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:15:27,923 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:15:27,928 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:15:27,928 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:15:27,929 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:15:27,930 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:15:27,931 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:15:27,932 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:15:27,933 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:15:27,934 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:15:27,935 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:15:27,936 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:15:27,938 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:15:27,939 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:15:27,940 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:15:27,940 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:15:27,941 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:15:27,942 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:15:27,943 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:15:27,944 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-25 19:15:27,976 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:15:27,977 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:15:27,977 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:15:27,977 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:15:27,978 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:15:27,979 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:15:27,979 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:15:27,979 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:15:27,980 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:15:27,980 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:15:27,980 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:15:27,981 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:15:27,982 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:15:27,982 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:15:27,982 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:15:27,983 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:15:27,983 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:15:27,983 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:15:27,983 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:15:27,984 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 19:15:27,984 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-25 19:15:27,984 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-25 19:15:27,984 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:15:27,985 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:15:27,985 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:15:27,985 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:15:27,986 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:15:27,986 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-25 19:15:27,986 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:15:27,986 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:15:27,987 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:15:27,987 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:15:27,987 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:15:27,987 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-25 19:15:27,988 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-25 19:15:27,988 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:15:27,988 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:15:27,989 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:15:27,989 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_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f673ebb9e7e04aacff207de4acfe748a76999a1319247236c14ae51e44f23889 [2021-11-25 19:15:28,396 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:15:28,422 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:15:28,425 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:15:28,426 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:15:28,427 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:15:28,429 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/seq-pthread/cs_stack-1.i [2021-11-25 19:15:28,516 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/data/ba3fa691f/6b571007fb934f15ba190277b7e55acc/FLAGf4ed87fe6 [2021-11-25 19:15:29,296 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:15:29,297 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/sv-benchmarks/c/seq-pthread/cs_stack-1.i [2021-11-25 19:15:29,332 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/data/ba3fa691f/6b571007fb934f15ba190277b7e55acc/FLAGf4ed87fe6 [2021-11-25 19:15:29,438 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/data/ba3fa691f/6b571007fb934f15ba190277b7e55acc [2021-11-25 19:15:29,442 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:15:29,445 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:15:29,448 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:15:29,448 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:15:29,452 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:15:29,454 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:15:29" (1/1) ... [2021-11-25 19:15:29,456 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@632c3d56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:15:29, skipping insertion in model container [2021-11-25 19:15:29,457 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:15:29" (1/1) ... [2021-11-25 19:15:29,465 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:15:29,555 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:15:30,185 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/sv-benchmarks/c/seq-pthread/cs_stack-1.i[34744,34757] [2021-11-25 19:15:30,311 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:15:30,331 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:15:30,370 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/sv-benchmarks/c/seq-pthread/cs_stack-1.i[34744,34757] [2021-11-25 19:15:30,490 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:15:30,622 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:15:30,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:15:30 WrapperNode [2021-11-25 19:15:30,623 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:15:30,624 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:15:30,625 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:15:30,625 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:15:30,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:15:30" (1/1) ... [2021-11-25 19:15:30,702 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:15:30" (1/1) ... [2021-11-25 19:15:30,796 INFO L137 Inliner]: procedures = 258, calls = 276, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 627 [2021-11-25 19:15:30,797 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:15:30,798 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:15:30,799 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:15:30,799 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:15:30,808 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:15:30" (1/1) ... [2021-11-25 19:15:30,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:15:30" (1/1) ... [2021-11-25 19:15:30,828 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:15:30" (1/1) ... [2021-11-25 19:15:30,834 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:15:30" (1/1) ... [2021-11-25 19:15:30,878 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:15:30" (1/1) ... [2021-11-25 19:15:30,899 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:15:30" (1/1) ... [2021-11-25 19:15:30,906 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:15:30" (1/1) ... [2021-11-25 19:15:30,919 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:15:30,926 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:15:30,927 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:15:30,928 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:15:30,928 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:15:30" (1/1) ... [2021-11-25 19:15:30,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:15:30,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:15:30,970 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:15:30,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:15:31,040 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-25 19:15:31,040 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-25 19:15:31,040 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-25 19:15:31,040 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-25 19:15:31,041 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 19:15:31,041 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_mutex_lock [2021-11-25 19:15:31,041 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_mutex_lock [2021-11-25 19:15:31,041 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 19:15:31,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-25 19:15:31,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 19:15:31,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-25 19:15:31,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 19:15:31,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-25 19:15:31,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-25 19:15:31,043 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_mutex_unlock [2021-11-25 19:15:31,043 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_mutex_unlock [2021-11-25 19:15:31,043 INFO L130 BoogieDeclarations]: Found specification of procedure get_top [2021-11-25 19:15:31,043 INFO L138 BoogieDeclarations]: Found implementation of procedure get_top [2021-11-25 19:15:31,044 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:15:31,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 19:15:31,044 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_create [2021-11-25 19:15:31,044 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_create [2021-11-25 19:15:31,044 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_join [2021-11-25 19:15:31,045 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_join [2021-11-25 19:15:31,045 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~$Pointer$ [2021-11-25 19:15:31,045 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~$Pointer$ [2021-11-25 19:15:31,045 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-11-25 19:15:31,045 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-11-25 19:15:31,046 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_cs [2021-11-25 19:15:31,046 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_cs [2021-11-25 19:15:31,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:15:31,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:15:31,293 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:15:31,296 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:15:31,399 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !(0bv32 != ~zero_extendFrom8To32(~__CS_ret~0)); [2021-11-25 19:15:31,400 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume 0bv32 != ~zero_extendFrom8To32(~__CS_ret~0);#res := 0bv32; [2021-11-25 19:15:31,439 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##8: assume !(0bv32 != ~zero_extendFrom8To32(~__CS_ret~0)); [2021-11-25 19:15:31,440 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##9: assume 0bv32 != ~zero_extendFrom8To32(~__CS_ret~0); [2021-11-25 19:15:31,440 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##7: assume 0bv32 != ~zero_extendFrom8To32(~__CS_ret~0); [2021-11-25 19:15:31,440 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !(0bv32 != ~zero_extendFrom8To32(~__CS_ret~0)); [2021-11-25 19:15:31,441 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !(0bv32 != ~zero_extendFrom8To32(~__CS_ret~0)); [2021-11-25 19:15:31,441 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L933: SUMMARY for call __CS_cs(); srcloc: null [2021-11-25 19:15:31,441 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L933-1: assume 0bv32 != ~zero_extendFrom8To32(~__CS_ret~0); [2021-11-25 19:15:31,442 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L933-1: assume !(0bv32 != ~zero_extendFrom8To32(~__CS_ret~0)); [2021-11-25 19:15:31,442 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume 0bv32 != ~zero_extendFrom8To32(~__CS_ret~0); [2021-11-25 19:15:32,033 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##97: assume !(0bv32 != ~zero_extendFrom8To32(~__CS_ret~0)); [2021-11-25 19:15:32,033 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##96: assume 0bv32 != ~zero_extendFrom8To32(~__CS_ret~0);push_#res#1 := 0bv32; [2021-11-25 19:15:32,034 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##54: assume !(0bv32 != ~zero_extendFrom8To32(~__CS_ret~0)); [2021-11-25 19:15:32,034 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##53: assume 0bv32 != ~zero_extendFrom8To32(~__CS_ret~0);pop_#res#1 := 0bv32; [2021-11-25 19:15:32,034 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##58: assume !(0bv32 != ~zero_extendFrom8To32(~__CS_ret~0)); [2021-11-25 19:15:32,035 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##57: assume 0bv32 != ~zero_extendFrom8To32(~__CS_ret~0);pop_#res#1 := 0bv32; [2021-11-25 19:15:32,035 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##43: assume !(0bv32 != ~zero_extendFrom8To32(~__CS_ret~0)); [2021-11-25 19:15:32,036 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##42: assume 0bv32 != ~zero_extendFrom8To32(~__CS_ret~0);pop_#res#1 := 0bv32; [2021-11-25 19:15:32,037 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L1005: assume 0bv32 != ~zero_extendFrom8To32(~__CS_ret~0);pop_#res#1 := 0bv32; [2021-11-25 19:15:32,038 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L1005: assume !(0bv32 != ~zero_extendFrom8To32(~__CS_ret~0));pop_#res#1 := 0bv32; [2021-11-25 19:15:32,038 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L989-2: SUMMARY for call __CS_cs(); srcloc: null [2021-11-25 19:15:32,038 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##111: assume 0bv32 != ~zero_extendFrom8To32(~__CS_ret~0);push_#res#1 := 0bv32; [2021-11-25 19:15:32,039 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##112: assume !(0bv32 != ~zero_extendFrom8To32(~__CS_ret~0)); [2021-11-25 19:15:34,844 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:15:34,856 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:15:34,856 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-25 19:15:34,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:15:34 BoogieIcfgContainer [2021-11-25 19:15:34,860 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:15:34,862 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:15:34,862 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:15:34,866 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:15:34,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:15:29" (1/3) ... [2021-11-25 19:15:34,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@865e764 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:15:34, skipping insertion in model container [2021-11-25 19:15:34,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:15:30" (2/3) ... [2021-11-25 19:15:34,868 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@865e764 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:15:34, skipping insertion in model container [2021-11-25 19:15:34,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:15:34" (3/3) ... [2021-11-25 19:15:34,870 INFO L111 eAbstractionObserver]: Analyzing ICFG cs_stack-1.i [2021-11-25 19:15:34,876 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:15:34,876 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:15:34,943 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:15:34,951 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 [2021-11-25 19:15:34,952 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:15:34,992 INFO L276 IsEmpty]: Start isEmpty. Operand has 226 states, 142 states have (on average 1.528169014084507) internal successors, (217), 145 states have internal predecessors, (217), 73 states have call successors, (73), 9 states have call predecessors, (73), 9 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2021-11-25 19:15:35,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-25 19:15:35,042 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:15:35,043 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:15:35,044 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:15:35,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:15:35,058 INFO L85 PathProgramCache]: Analyzing trace with hash 2082055361, now seen corresponding path program 1 times [2021-11-25 19:15:35,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:15:35,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [373252321] [2021-11-25 19:15:35,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:15:35,081 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:15:35,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:15:35,100 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:15:35,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-25 19:15:51,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:15:53,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 10837 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-25 19:15:53,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:15:54,135 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2021-11-25 19:15:54,135 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:15:54,136 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:15:54,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [373252321] [2021-11-25 19:15:54,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [373252321] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:15:54,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:15:54,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:15:54,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809524722] [2021-11-25 19:15:54,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:15:54,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 19:15:54,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:15:54,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 19:15:54,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 19:15:54,203 INFO L87 Difference]: Start difference. First operand has 226 states, 142 states have (on average 1.528169014084507) internal successors, (217), 145 states have internal predecessors, (217), 73 states have call successors, (73), 9 states have call predecessors, (73), 9 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) Second operand has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-25 19:15:54,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:15:54,323 INFO L93 Difference]: Finished difference Result 450 states and 791 transitions. [2021-11-25 19:15:54,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 19:15:54,329 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 96 [2021-11-25 19:15:54,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:15:54,363 INFO L225 Difference]: With dead ends: 450 [2021-11-25 19:15:54,363 INFO L226 Difference]: Without dead ends: 222 [2021-11-25 19:15:54,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 19:15:54,385 INFO L933 BasicCegarLoop]: 356 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:15:54,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:15:54,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-11-25 19:15:54,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2021-11-25 19:15:54,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 139 states have (on average 1.4820143884892085) internal successors, (206), 141 states have internal predecessors, (206), 73 states have call successors, (73), 9 states have call predecessors, (73), 9 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2021-11-25 19:15:54,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 352 transitions. [2021-11-25 19:15:54,510 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 352 transitions. Word has length 96 [2021-11-25 19:15:54,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:15:54,510 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 352 transitions. [2021-11-25 19:15:54,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-25 19:15:54,511 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 352 transitions. [2021-11-25 19:15:54,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-25 19:15:54,521 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:15:54,521 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:15:54,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:15:54,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:15:54,738 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:15:54,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:15:54,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1601368773, now seen corresponding path program 1 times [2021-11-25 19:15:54,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:15:54,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [90993163] [2021-11-25 19:15:54,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:15:54,741 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:15:54,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:15:54,743 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:15:54,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-25 19:16:11,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:16:13,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 10837 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 19:16:13,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:16:13,519 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-25 19:16:13,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:16:13,520 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:16:13,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [90993163] [2021-11-25 19:16:13,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [90993163] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:16:13,520 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:16:13,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:16:13,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665224653] [2021-11-25 19:16:13,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:16:13,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:16:13,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:16:13,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:16:13,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:16:13,525 INFO L87 Difference]: Start difference. First operand 222 states and 352 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-25 19:16:13,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:16:13,807 INFO L93 Difference]: Finished difference Result 442 states and 702 transitions. [2021-11-25 19:16:13,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:16:13,810 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) Word has length 96 [2021-11-25 19:16:13,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:16:13,814 INFO L225 Difference]: With dead ends: 442 [2021-11-25 19:16:13,814 INFO L226 Difference]: Without dead ends: 229 [2021-11-25 19:16:13,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:16:13,818 INFO L933 BasicCegarLoop]: 348 mSDtfsCounter, 8 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:16:13,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 694 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:16:13,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-11-25 19:16:13,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 223. [2021-11-25 19:16:13,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 140 states have (on average 1.4785714285714286) internal successors, (207), 142 states have internal predecessors, (207), 73 states have call successors, (73), 9 states have call predecessors, (73), 9 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2021-11-25 19:16:13,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 353 transitions. [2021-11-25 19:16:13,859 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 353 transitions. Word has length 96 [2021-11-25 19:16:13,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:16:13,859 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 353 transitions. [2021-11-25 19:16:13,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-25 19:16:13,860 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 353 transitions. [2021-11-25 19:16:13,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-25 19:16:13,865 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:16:13,866 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:16:14,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-25 19:16:14,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:16:14,093 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:16:14,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:16:14,093 INFO L85 PathProgramCache]: Analyzing trace with hash -36735240, now seen corresponding path program 1 times [2021-11-25 19:16:14,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:16:14,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [15194579] [2021-11-25 19:16:14,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:16:14,095 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:16:14,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:16:14,097 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:16:14,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-25 19:16:31,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:16:32,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 10876 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 19:16:32,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:16:33,261 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-25 19:16:33,262 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:16:33,262 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:16:33,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [15194579] [2021-11-25 19:16:33,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [15194579] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:16:33,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:16:33,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:16:33,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359112984] [2021-11-25 19:16:33,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:16:33,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:16:33,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:16:33,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:16:33,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:16:33,266 INFO L87 Difference]: Start difference. First operand 223 states and 353 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-25 19:16:33,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:16:33,396 INFO L93 Difference]: Finished difference Result 447 states and 709 transitions. [2021-11-25 19:16:33,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:16:33,398 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) Word has length 101 [2021-11-25 19:16:33,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:16:33,402 INFO L225 Difference]: With dead ends: 447 [2021-11-25 19:16:33,402 INFO L226 Difference]: Without dead ends: 227 [2021-11-25 19:16:33,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:16:33,407 INFO L933 BasicCegarLoop]: 348 mSDtfsCounter, 2 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:16:33,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 691 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:16:33,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-11-25 19:16:33,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 225. [2021-11-25 19:16:33,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 142 states have (on average 1.471830985915493) internal successors, (209), 144 states have internal predecessors, (209), 73 states have call successors, (73), 9 states have call predecessors, (73), 9 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2021-11-25 19:16:33,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 355 transitions. [2021-11-25 19:16:33,440 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 355 transitions. Word has length 101 [2021-11-25 19:16:33,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:16:33,440 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 355 transitions. [2021-11-25 19:16:33,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-25 19:16:33,441 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 355 transitions. [2021-11-25 19:16:33,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-25 19:16:33,445 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:16:33,445 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:16:33,607 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-25 19:16:33,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:16:33,669 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:16:33,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:16:33,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1158934788, now seen corresponding path program 1 times [2021-11-25 19:16:33,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:16:33,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [739570015] [2021-11-25 19:16:33,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:16:33,672 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:16:33,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:16:33,683 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:16:33,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-25 19:16:50,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:16:52,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 10908 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:16:52,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:16:52,380 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2021-11-25 19:16:52,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:16:52,695 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2021-11-25 19:16:52,696 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:16:52,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [739570015] [2021-11-25 19:16:52,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [739570015] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:16:52,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1412878202] [2021-11-25 19:16:52,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:16:52,697 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:16:52,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:16:52,698 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:16:52,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-25 19:17:02,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:17:03,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 10908 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:17:03,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:17:03,607 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2021-11-25 19:17:03,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:17:03,841 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2021-11-25 19:17:03,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1412878202] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:17:03,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981322891] [2021-11-25 19:17:03,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:17:03,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:17:03,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:17:03,846 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:17:03,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 19:17:12,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:17:12,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 10908 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:17:12,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:17:12,528 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2021-11-25 19:17:12,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:17:12,801 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2021-11-25 19:17:12,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981322891] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:17:12,802 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:17:12,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 8 [2021-11-25 19:17:12,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572482133] [2021-11-25 19:17:12,802 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:17:12,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 19:17:12,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:17:12,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 19:17:12,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:17:12,805 INFO L87 Difference]: Start difference. First operand 225 states and 355 transitions. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 1 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (28), 1 states have call predecessors, (28), 1 states have call successors, (28) [2021-11-25 19:17:13,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:17:13,212 INFO L93 Difference]: Finished difference Result 459 states and 725 transitions. [2021-11-25 19:17:13,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:17:13,213 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 1 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (28), 1 states have call predecessors, (28), 1 states have call successors, (28) Word has length 105 [2021-11-25 19:17:13,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:17:13,216 INFO L225 Difference]: With dead ends: 459 [2021-11-25 19:17:13,216 INFO L226 Difference]: Without dead ends: 237 [2021-11-25 19:17:13,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 626 GetRequests, 619 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-11-25 19:17:13,219 INFO L933 BasicCegarLoop]: 347 mSDtfsCounter, 17 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 1033 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:17:13,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 1033 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 19:17:13,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-11-25 19:17:13,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2021-11-25 19:17:13,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 154 states have (on average 1.4350649350649352) internal successors, (221), 156 states have internal predecessors, (221), 73 states have call successors, (73), 9 states have call predecessors, (73), 9 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2021-11-25 19:17:13,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 367 transitions. [2021-11-25 19:17:13,243 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 367 transitions. Word has length 105 [2021-11-25 19:17:13,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:17:13,244 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 367 transitions. [2021-11-25 19:17:13,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 1 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (28), 1 states have call predecessors, (28), 1 states have call successors, (28) [2021-11-25 19:17:13,244 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 367 transitions. [2021-11-25 19:17:13,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-25 19:17:13,248 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:17:13,248 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:17:13,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-11-25 19:17:13,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-25 19:17:13,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 19:17:13,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:17:13,877 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:17:13,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:17:13,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1054757704, now seen corresponding path program 2 times [2021-11-25 19:17:13,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:17:13,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1956250632] [2021-11-25 19:17:13,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 19:17:13,879 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:17:13,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:17:13,880 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:17:13,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-25 19:17:29,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-25 19:17:29,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:17:30,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 10714 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:17:30,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:17:31,293 INFO L134 CoverageAnalysis]: Checked inductivity of 399 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 399 trivial. 0 not checked. [2021-11-25 19:17:31,293 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:17:31,293 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:17:31,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1956250632] [2021-11-25 19:17:31,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1956250632] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:17:31,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:17:31,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:17:31,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557108180] [2021-11-25 19:17:31,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:17:31,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:17:31,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:17:31,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:17:31,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:17:31,297 INFO L87 Difference]: Start difference. First operand 237 states and 367 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-25 19:17:31,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:17:31,363 INFO L93 Difference]: Finished difference Result 447 states and 711 transitions. [2021-11-25 19:17:31,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:17:31,366 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) Word has length 117 [2021-11-25 19:17:31,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:17:31,373 INFO L225 Difference]: With dead ends: 447 [2021-11-25 19:17:31,373 INFO L226 Difference]: Without dead ends: 413 [2021-11-25 19:17:31,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:17:31,375 INFO L933 BasicCegarLoop]: 445 mSDtfsCounter, 283 mSDsluCounter, 783 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 1228 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:17:31,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 1228 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:17:31,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-11-25 19:17:31,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 412. [2021-11-25 19:17:31,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 262 states have (on average 1.4885496183206106) internal successors, (390), 266 states have internal predecessors, (390), 131 states have call successors, (131), 18 states have call predecessors, (131), 18 states have return successors, (139), 131 states have call predecessors, (139), 131 states have call successors, (139) [2021-11-25 19:17:31,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 660 transitions. [2021-11-25 19:17:31,422 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 660 transitions. Word has length 117 [2021-11-25 19:17:31,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:17:31,423 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 660 transitions. [2021-11-25 19:17:31,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-25 19:17:31,423 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 660 transitions. [2021-11-25 19:17:31,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-11-25 19:17:31,431 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:17:31,432 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:17:31,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-25 19:17:31,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:17:31,657 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:17:31,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:17:31,657 INFO L85 PathProgramCache]: Analyzing trace with hash -2072326354, now seen corresponding path program 1 times [2021-11-25 19:17:31,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:17:31,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2105299412] [2021-11-25 19:17:31,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:17:31,658 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:17:31,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:17:31,660 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:17:31,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-25 19:17:48,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:17:50,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 11194 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:17:50,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:17:50,681 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2021-11-25 19:17:50,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:17:51,226 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2021-11-25 19:17:51,226 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:17:51,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2105299412] [2021-11-25 19:17:51,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2105299412] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:17:51,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1649233745] [2021-11-25 19:17:51,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:17:51,227 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:17:51,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:17:51,228 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:17:51,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-25 19:18:02,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:18:02,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 11194 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:18:02,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:18:03,524 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 689 trivial. 0 not checked. [2021-11-25 19:18:03,524 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:18:03,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1649233745] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:18:03,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:18:03,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 9 [2021-11-25 19:18:03,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971591863] [2021-11-25 19:18:03,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:18:03,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:18:03,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:18:03,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:18:03,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-25 19:18:03,527 INFO L87 Difference]: Start difference. First operand 412 states and 660 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (24), 3 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-25 19:18:04,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:18:04,935 INFO L93 Difference]: Finished difference Result 1027 states and 1756 transitions. [2021-11-25 19:18:04,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:18:04,936 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (24), 3 states have call predecessors, (24), 2 states have call successors, (24) Word has length 206 [2021-11-25 19:18:04,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:18:04,944 INFO L225 Difference]: With dead ends: 1027 [2021-11-25 19:18:04,944 INFO L226 Difference]: Without dead ends: 642 [2021-11-25 19:18:04,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 616 GetRequests, 608 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-25 19:18:04,950 INFO L933 BasicCegarLoop]: 344 mSDtfsCounter, 609 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 659 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:18:04,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [659 Valid, 615 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-25 19:18:04,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-11-25 19:18:05,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 632. [2021-11-25 19:18:05,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 430 states have (on average 1.3162790697674418) internal successors, (566), 368 states have internal predecessors, (566), 169 states have call successors, (169), 22 states have call predecessors, (169), 32 states have return successors, (282), 249 states have call predecessors, (282), 169 states have call successors, (282) [2021-11-25 19:18:05,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 1017 transitions. [2021-11-25 19:18:05,035 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 1017 transitions. Word has length 206 [2021-11-25 19:18:05,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:18:05,035 INFO L470 AbstractCegarLoop]: Abstraction has 632 states and 1017 transitions. [2021-11-25 19:18:05,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (24), 3 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-25 19:18:05,036 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 1017 transitions. [2021-11-25 19:18:05,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-11-25 19:18:05,047 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:18:05,048 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:18:05,198 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-25 19:18:05,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2021-11-25 19:18:05,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 19:18:05,471 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:18:05,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:18:05,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1746944736, now seen corresponding path program 1 times [2021-11-25 19:18:05,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:18:05,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1090131562] [2021-11-25 19:18:05,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:18:05,473 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:18:05,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:18:05,478 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:18:05,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-25 19:18:23,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:18:25,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 11198 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:18:25,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:18:26,115 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2021-11-25 19:18:26,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:18:26,642 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2021-11-25 19:18:26,643 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:18:26,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1090131562] [2021-11-25 19:18:26,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1090131562] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:18:26,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [849831029] [2021-11-25 19:18:26,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:18:26,643 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:18:26,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:18:26,644 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:18:26,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-25 19:18:40,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:18:41,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 11198 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:18:41,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:18:41,930 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2021-11-25 19:18:41,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:18:42,413 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2021-11-25 19:18:42,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [849831029] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:18:42,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195170623] [2021-11-25 19:18:42,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:18:42,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:18:42,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:18:42,416 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:18:42,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 19:18:53,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:18:53,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 11198 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 19:18:53,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:18:54,106 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 789 trivial. 0 not checked. [2021-11-25 19:18:54,106 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:18:54,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195170623] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:18:54,107 INFO L186 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2021-11-25 19:18:54,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4, 4, 4] total 7 [2021-11-25 19:18:54,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724980442] [2021-11-25 19:18:54,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:18:54,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:18:54,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:18:54,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:18:54,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:18:54,110 INFO L87 Difference]: Start difference. First operand 632 states and 1017 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 1 states have call successors, (23), 1 states have call predecessors, (23), 1 states have return successors, (23), 1 states have call predecessors, (23), 1 states have call successors, (23) [2021-11-25 19:18:54,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:18:54,178 INFO L93 Difference]: Finished difference Result 1224 states and 1980 transitions. [2021-11-25 19:18:54,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:18:54,179 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 1 states have call successors, (23), 1 states have call predecessors, (23), 1 states have return successors, (23), 1 states have call predecessors, (23), 1 states have call successors, (23) Word has length 207 [2021-11-25 19:18:54,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:18:54,186 INFO L225 Difference]: With dead ends: 1224 [2021-11-25 19:18:54,186 INFO L226 Difference]: Without dead ends: 632 [2021-11-25 19:18:54,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1030 GetRequests, 1025 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:18:54,193 INFO L933 BasicCegarLoop]: 350 mSDtfsCounter, 0 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:18:54,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 698 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:18:54,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-11-25 19:18:54,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 632. [2021-11-25 19:18:54,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 430 states have (on average 1.313953488372093) internal successors, (565), 368 states have internal predecessors, (565), 169 states have call successors, (169), 22 states have call predecessors, (169), 32 states have return successors, (282), 249 states have call predecessors, (282), 169 states have call successors, (282) [2021-11-25 19:18:54,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 1016 transitions. [2021-11-25 19:18:54,266 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 1016 transitions. Word has length 207 [2021-11-25 19:18:54,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:18:54,266 INFO L470 AbstractCegarLoop]: Abstraction has 632 states and 1016 transitions. [2021-11-25 19:18:54,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 1 states have call successors, (23), 1 states have call predecessors, (23), 1 states have return successors, (23), 1 states have call predecessors, (23), 1 states have call successors, (23) [2021-11-25 19:18:54,267 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 1016 transitions. [2021-11-25 19:18:54,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-11-25 19:18:54,278 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:18:54,279 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 6, 6, 6, 6, 6, 6, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:18:54,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-25 19:18:54,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-25 19:18:54,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2021-11-25 19:18:54,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 19:18:54,893 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:18:54,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:18:54,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1399806017, now seen corresponding path program 1 times [2021-11-25 19:18:54,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:18:54,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1755904879] [2021-11-25 19:18:54,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:18:54,895 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:18:54,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:18:54,896 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:18:54,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-25 19:19:13,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:19:15,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 11348 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:19:15,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:19:15,877 INFO L134 CoverageAnalysis]: Checked inductivity of 909 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 908 trivial. 0 not checked. [2021-11-25 19:19:15,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:19:16,340 INFO L134 CoverageAnalysis]: Checked inductivity of 909 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 908 trivial. 0 not checked. [2021-11-25 19:19:16,341 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:19:16,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1755904879] [2021-11-25 19:19:16,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1755904879] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:19:16,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1957332953] [2021-11-25 19:19:16,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:19:16,341 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:19:16,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:19:16,342 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:19:16,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-25 19:19:30,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:19:30,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 11348 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 19:19:30,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:19:31,463 INFO L134 CoverageAnalysis]: Checked inductivity of 909 backedges. 338 proven. 7 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2021-11-25 19:19:31,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:19:32,252 INFO L134 CoverageAnalysis]: Checked inductivity of 909 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 902 trivial. 0 not checked. [2021-11-25 19:19:32,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1957332953] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:19:32,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287297642] [2021-11-25 19:19:32,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:19:32,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:19:32,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:19:32,254 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:19:32,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-25 19:19:41,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:19:42,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 11348 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:19:42,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:19:42,534 INFO L134 CoverageAnalysis]: Checked inductivity of 909 backedges. 336 proven. 7 refuted. 0 times theorem prover too weak. 566 trivial. 0 not checked. [2021-11-25 19:19:42,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:19:43,217 INFO L134 CoverageAnalysis]: Checked inductivity of 909 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 902 trivial. 0 not checked. [2021-11-25 19:19:43,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287297642] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:19:43,217 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:19:43,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 8, 5, 6, 5] total 14 [2021-11-25 19:19:43,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594697509] [2021-11-25 19:19:43,218 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:19:43,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-25 19:19:43,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:19:43,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-25 19:19:43,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-25 19:19:43,221 INFO L87 Difference]: Start difference. First operand 632 states and 1016 transitions. Second operand has 14 states, 13 states have (on average 14.076923076923077) internal successors, (183), 14 states have internal predecessors, (183), 9 states have call successors, (71), 5 states have call predecessors, (71), 6 states have return successors, (71), 7 states have call predecessors, (71), 9 states have call successors, (71) [2021-11-25 19:19:46,103 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:19:48,114 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:19:50,121 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:20:01,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:20:01,732 INFO L93 Difference]: Finished difference Result 2684 states and 4335 transitions. [2021-11-25 19:20:01,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-25 19:20:01,733 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 14.076923076923077) internal successors, (183), 14 states have internal predecessors, (183), 9 states have call successors, (71), 5 states have call predecessors, (71), 6 states have return successors, (71), 7 states have call predecessors, (71), 9 states have call successors, (71) Word has length 233 [2021-11-25 19:20:01,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:20:01,757 INFO L225 Difference]: With dead ends: 2684 [2021-11-25 19:20:01,757 INFO L226 Difference]: Without dead ends: 2076 [2021-11-25 19:20:01,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1409 GetRequests, 1387 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2021-11-25 19:20:01,766 INFO L933 BasicCegarLoop]: 462 mSDtfsCounter, 1304 mSDsluCounter, 1679 mSDsCounter, 0 mSdLazyCounter, 2498 mSolverCounterSat, 1038 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1395 SdHoareTripleChecker+Valid, 2141 SdHoareTripleChecker+Invalid, 3539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1038 IncrementalHoareTripleChecker+Valid, 2498 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.8s IncrementalHoareTripleChecker+Time [2021-11-25 19:20:01,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1395 Valid, 2141 Invalid, 3539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1038 Valid, 2498 Invalid, 3 Unknown, 0 Unchecked, 17.8s Time] [2021-11-25 19:20:01,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2076 states. [2021-11-25 19:20:02,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2076 to 2007. [2021-11-25 19:20:02,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2007 states, 1349 states have (on average 1.2928094885100074) internal successors, (1744), 1193 states have internal predecessors, (1744), 538 states have call successors, (538), 79 states have call predecessors, (538), 119 states have return successors, (937), 758 states have call predecessors, (937), 538 states have call successors, (937) [2021-11-25 19:20:02,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2007 states to 2007 states and 3219 transitions. [2021-11-25 19:20:02,093 INFO L78 Accepts]: Start accepts. Automaton has 2007 states and 3219 transitions. Word has length 233 [2021-11-25 19:20:02,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:20:02,093 INFO L470 AbstractCegarLoop]: Abstraction has 2007 states and 3219 transitions. [2021-11-25 19:20:02,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 14.076923076923077) internal successors, (183), 14 states have internal predecessors, (183), 9 states have call successors, (71), 5 states have call predecessors, (71), 6 states have return successors, (71), 7 states have call predecessors, (71), 9 states have call successors, (71) [2021-11-25 19:20:02,094 INFO L276 IsEmpty]: Start isEmpty. Operand 2007 states and 3219 transitions. [2021-11-25 19:20:02,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-11-25 19:20:02,116 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:20:02,117 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:20:02,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-25 19:20:02,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-25 19:20:02,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-25 19:20:02,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 19:20:02,741 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:20:02,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:20:02,742 INFO L85 PathProgramCache]: Analyzing trace with hash -288232608, now seen corresponding path program 1 times [2021-11-25 19:20:02,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:20:02,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [569244488] [2021-11-25 19:20:02,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:20:02,743 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:20:02,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:20:02,743 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:20:02,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-25 19:23:14,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:23:15,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 11445 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:23:15,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:23:15,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 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 [2021-11-25 19:23:16,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 19:23:16,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 19:23:17,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1029 backedges. 336 proven. 5 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2021-11-25 19:23:17,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:23:17,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-11-25 19:23:18,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1029 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2021-11-25 19:23:18,483 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:23:18,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [569244488] [2021-11-25 19:23:18,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [569244488] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:23:18,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1290659781] [2021-11-25 19:23:18,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:23:18,484 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:23:18,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:23:18,494 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:23:18,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-25 19:23:59,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:24:00,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 11445 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:24:00,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:24:00,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 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 [2021-11-25 19:24:01,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 19:24:01,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 19:24:01,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1029 backedges. 336 proven. 5 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2021-11-25 19:24:01,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:24:02,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-11-25 19:24:03,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1029 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2021-11-25 19:24:03,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1290659781] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:24:03,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103589974] [2021-11-25 19:24:03,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:24:03,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:24:03,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:24:03,233 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:24:03,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-25 19:24:17,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:24:17,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 11445 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:24:17,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:24:17,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 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 [2021-11-25 19:24:17,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 19:24:18,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 19:24:18,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1029 backedges. 336 proven. 5 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2021-11-25 19:24:18,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:24:19,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-11-25 19:24:20,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1029 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2021-11-25 19:24:20,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103589974] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:24:20,096 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:24:20,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 12 [2021-11-25 19:24:20,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984024451] [2021-11-25 19:24:20,097 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:24:20,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 19:24:20,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:24:20,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 19:24:20,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-25 19:24:20,101 INFO L87 Difference]: Start difference. First operand 2007 states and 3219 transitions. Second operand has 12 states, 12 states have (on average 14.166666666666666) internal successors, (170), 12 states have internal predecessors, (170), 12 states have call successors, (55), 6 states have call predecessors, (55), 8 states have return successors, (55), 12 states have call predecessors, (55), 12 states have call successors, (55) [2021-11-25 19:24:22,203 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:24:28,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:24:28,640 INFO L93 Difference]: Finished difference Result 2360 states and 3712 transitions. [2021-11-25 19:24:28,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 19:24:28,641 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 14.166666666666666) internal successors, (170), 12 states have internal predecessors, (170), 12 states have call successors, (55), 6 states have call predecessors, (55), 8 states have return successors, (55), 12 states have call predecessors, (55), 12 states have call successors, (55) Word has length 250 [2021-11-25 19:24:28,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:24:28,670 INFO L225 Difference]: With dead ends: 2360 [2021-11-25 19:24:28,671 INFO L226 Difference]: Without dead ends: 2086 [2021-11-25 19:24:28,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1504 GetRequests, 1484 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-11-25 19:24:28,677 INFO L933 BasicCegarLoop]: 357 mSDtfsCounter, 1401 mSDsluCounter, 1312 mSDsCounter, 0 mSdLazyCounter, 1025 mSolverCounterSat, 1031 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1408 SdHoareTripleChecker+Valid, 1669 SdHoareTripleChecker+Invalid, 2057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1031 IncrementalHoareTripleChecker+Valid, 1025 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:24:28,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1408 Valid, 1669 Invalid, 2057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1031 Valid, 1025 Invalid, 1 Unknown, 0 Unchecked, 8.0s Time] [2021-11-25 19:24:28,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2086 states. [2021-11-25 19:24:28,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2086 to 2028. [2021-11-25 19:24:28,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 1363 states have (on average 1.2898019075568599) internal successors, (1758), 1214 states have internal predecessors, (1758), 538 states have call successors, (538), 79 states have call predecessors, (538), 126 states have return successors, (944), 758 states have call predecessors, (944), 538 states have call successors, (944) [2021-11-25 19:24:28,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 3240 transitions. [2021-11-25 19:24:28,869 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 3240 transitions. Word has length 250 [2021-11-25 19:24:28,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:24:28,871 INFO L470 AbstractCegarLoop]: Abstraction has 2028 states and 3240 transitions. [2021-11-25 19:24:28,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.166666666666666) internal successors, (170), 12 states have internal predecessors, (170), 12 states have call successors, (55), 6 states have call predecessors, (55), 8 states have return successors, (55), 12 states have call predecessors, (55), 12 states have call successors, (55) [2021-11-25 19:24:28,871 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 3240 transitions. [2021-11-25 19:24:28,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-11-25 19:24:28,895 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:24:28,895 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:24:29,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-25 19:24:29,320 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (17)] Forcibly destroying the process [2021-11-25 19:24:29,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 137 [2021-11-25 19:24:29,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-25 19:24:29,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 19:24:29,619 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:24:29,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:24:29,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1149635824, now seen corresponding path program 1 times [2021-11-25 19:24:29,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:24:29,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1859376723] [2021-11-25 19:24:29,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:24:29,621 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:24:29,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:24:29,623 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:24:29,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-25 19:24:54,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:24:56,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 11426 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:24:56,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:24:56,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 19:24:56,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 19:24:56,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 19:24:56,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 19:24:57,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1033 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 913 trivial. 0 not checked. [2021-11-25 19:24:57,603 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:24:57,603 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:24:57,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1859376723] [2021-11-25 19:24:57,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1859376723] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:24:57,604 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:24:57,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:24:57,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295762322] [2021-11-25 19:24:57,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:24:57,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:24:57,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:24:57,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:24:57,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:24:57,607 INFO L87 Difference]: Start difference. First operand 2028 states and 3240 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 4 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (26), 3 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-25 19:24:58,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:24:58,488 INFO L93 Difference]: Finished difference Result 3998 states and 6365 transitions. [2021-11-25 19:24:58,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:24:58,491 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 4 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (26), 3 states have call predecessors, (26), 4 states have call successors, (26) Word has length 251 [2021-11-25 19:24:58,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:24:58,517 INFO L225 Difference]: With dead ends: 3998 [2021-11-25 19:24:58,517 INFO L226 Difference]: Without dead ends: 2005 [2021-11-25 19:24:58,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:24:58,535 INFO L933 BasicCegarLoop]: 403 mSDtfsCounter, 437 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 1009 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 19:24:58,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [478 Valid, 1009 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 19:24:58,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2005 states. [2021-11-25 19:24:58,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2005 to 1983. [2021-11-25 19:24:58,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1983 states, 1328 states have (on average 1.2884036144578312) internal successors, (1711), 1182 states have internal predecessors, (1711), 531 states have call successors, (531), 78 states have call predecessors, (531), 123 states have return successors, (918), 746 states have call predecessors, (918), 531 states have call successors, (918) [2021-11-25 19:24:58,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1983 states to 1983 states and 3160 transitions. [2021-11-25 19:24:58,945 INFO L78 Accepts]: Start accepts. Automaton has 1983 states and 3160 transitions. Word has length 251 [2021-11-25 19:24:58,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:24:58,946 INFO L470 AbstractCegarLoop]: Abstraction has 1983 states and 3160 transitions. [2021-11-25 19:24:58,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 4 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (26), 3 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-25 19:24:58,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1983 states and 3160 transitions. [2021-11-25 19:24:58,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-11-25 19:24:58,971 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:24:58,971 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:24:59,197 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (20)] Forcibly destroying the process [2021-11-25 19:24:59,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-25 19:24:59,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:24:59,241 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:24:59,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:24:59,242 INFO L85 PathProgramCache]: Analyzing trace with hash -169450816, now seen corresponding path program 1 times [2021-11-25 19:24:59,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:24:59,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [561453324] [2021-11-25 19:24:59,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:24:59,243 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:24:59,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:24:59,246 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:24:59,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14032ab8-1341-4f40-a1c5-cd27fa0ccb98/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process