./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_seq_init_ground.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_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/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_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_seq_init_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/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_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/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 eab386bb7401f51a7807d88da5762f33f54a558b2c1945526724b989e81d1d36 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:32:33,191 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:32:33,192 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:32:33,236 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:32:33,237 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:32:33,241 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:32:33,244 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:32:33,248 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:32:33,250 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:32:33,257 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:32:33,258 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:32:33,259 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:32:33,260 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:32:33,261 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:32:33,262 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:32:33,264 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:32:33,264 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:32:33,265 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:32:33,272 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:32:33,281 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:32:33,283 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:32:33,285 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:32:33,293 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:32:33,294 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:32:33,297 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:32:33,298 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:32:33,298 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:32:33,300 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:32:33,301 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:32:33,302 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:32:33,303 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:32:33,304 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:32:33,306 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:32:33,307 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:32:33,308 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:32:33,309 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:32:33,309 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:32:33,309 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:32:33,310 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:32:33,311 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:32:33,311 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:32:33,312 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:32:33,359 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:32:33,359 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:32:33,360 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:32:33,360 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:32:33,361 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:32:33,366 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:32:33,367 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:32:33,367 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:32:33,367 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:32:33,367 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:32:33,368 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:32:33,369 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:32:33,369 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:32:33,369 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:32:33,369 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:32:33,369 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:32:33,370 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:32:33,370 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:32:33,370 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:32:33,371 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:32:33,371 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:32:33,371 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:32:33,371 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:32:33,371 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:32:33,372 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:32:33,372 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:32:33,372 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:32:33,372 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:32:33,372 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:32:33,373 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:32:33,373 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:32:33,373 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:32:33,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:32:33,374 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:32:33,374 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:32:33,374 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:32:33,374 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:32:33,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:32:33,374 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:32:33,375 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:32:33,375 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:32:33,375 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_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eab386bb7401f51a7807d88da5762f33f54a558b2c1945526724b989e81d1d36 [2021-11-25 19:32:33,695 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:32:33,715 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:32:33,717 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:32:33,718 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:32:33,719 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:32:33,720 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/array-examples/standard_seq_init_ground.i [2021-11-25 19:32:33,783 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/bin/utaipan-eEHZpOm5b7/data/53fdccb6e/1e1ae16949654c2e9541baef77859cce/FLAGd1cc9aad1 [2021-11-25 19:32:34,240 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:32:34,241 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/sv-benchmarks/c/array-examples/standard_seq_init_ground.i [2021-11-25 19:32:34,251 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/bin/utaipan-eEHZpOm5b7/data/53fdccb6e/1e1ae16949654c2e9541baef77859cce/FLAGd1cc9aad1 [2021-11-25 19:32:34,619 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/bin/utaipan-eEHZpOm5b7/data/53fdccb6e/1e1ae16949654c2e9541baef77859cce [2021-11-25 19:32:34,621 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:32:34,623 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:32:34,624 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:32:34,624 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:32:34,628 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:32:34,628 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:32:34" (1/1) ... [2021-11-25 19:32:34,629 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e3ea1d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:34, skipping insertion in model container [2021-11-25 19:32:34,630 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:32:34" (1/1) ... [2021-11-25 19:32:34,637 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:32:34,650 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:32:34,830 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_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/sv-benchmarks/c/array-examples/standard_seq_init_ground.i[817,830] [2021-11-25 19:32:34,847 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:32:34,855 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:32:34,868 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_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/sv-benchmarks/c/array-examples/standard_seq_init_ground.i[817,830] [2021-11-25 19:32:34,878 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:32:34,893 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:32:34,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:34 WrapperNode [2021-11-25 19:32:34,894 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:32:34,895 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:32:34,896 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:32:34,896 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:32:34,903 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:34" (1/1) ... [2021-11-25 19:32:34,910 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:34" (1/1) ... [2021-11-25 19:32:34,931 INFO L137 Inliner]: procedures = 15, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 46 [2021-11-25 19:32:34,932 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:32:34,933 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:32:34,933 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:32:34,933 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:32:34,941 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:34" (1/1) ... [2021-11-25 19:32:34,941 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:34" (1/1) ... [2021-11-25 19:32:34,953 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:34" (1/1) ... [2021-11-25 19:32:34,954 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:34" (1/1) ... [2021-11-25 19:32:34,961 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:34" (1/1) ... [2021-11-25 19:32:34,968 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:34" (1/1) ... [2021-11-25 19:32:34,975 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:34" (1/1) ... [2021-11-25 19:32:34,977 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:32:34,978 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:32:34,978 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:32:34,979 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:32:34,980 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:34" (1/1) ... [2021-11-25 19:32:34,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:32:34,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:32:35,013 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:32:35,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:32:35,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:32:35,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:32:35,062 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 19:32:35,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 19:32:35,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:32:35,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:32:35,063 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 19:32:35,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 19:32:35,131 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:32:35,132 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:32:35,278 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:32:35,316 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:32:35,316 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-25 19:32:35,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:32:35 BoogieIcfgContainer [2021-11-25 19:32:35,318 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:32:35,320 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:32:35,321 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:32:35,337 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:32:35,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:32:34" (1/3) ... [2021-11-25 19:32:35,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@148ba773 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:32:35, skipping insertion in model container [2021-11-25 19:32:35,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:34" (2/3) ... [2021-11-25 19:32:35,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@148ba773 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:32:35, skipping insertion in model container [2021-11-25 19:32:35,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:32:35" (3/3) ... [2021-11-25 19:32:35,340 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_seq_init_ground.i [2021-11-25 19:32:35,345 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:32:35,346 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:32:35,420 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:32:35,427 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 19:32:35,427 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:32:35,444 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:32:35,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-25 19:32:35,454 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:32:35,454 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-25 19:32:35,455 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:32:35,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:32:35,465 INFO L85 PathProgramCache]: Analyzing trace with hash 71640501, now seen corresponding path program 1 times [2021-11-25 19:32:35,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:32:35,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137208626] [2021-11-25 19:32:35,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:32:35,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:32:35,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:32:35,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:32:35,680 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:32:35,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137208626] [2021-11-25 19:32:35,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137208626] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:32:35,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:32:35,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:32:35,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059764761] [2021-11-25 19:32:35,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:32:35,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:32:35,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:32:35,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:32:35,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:32:35,730 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:32:35,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:32:35,767 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2021-11-25 19:32:35,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:32:35,770 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-25 19:32:35,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:32:35,777 INFO L225 Difference]: With dead ends: 15 [2021-11-25 19:32:35,777 INFO L226 Difference]: Without dead ends: 8 [2021-11-25 19:32:35,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:32:35,784 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:32:35,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:32:35,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-11-25 19:32:35,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-11-25 19:32:35,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:32:35,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-11-25 19:32:35,814 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2021-11-25 19:32:35,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:32:35,814 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-11-25 19:32:35,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:32:35,815 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-11-25 19:32:35,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 19:32:35,816 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:32:35,816 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 19:32:35,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:32:35,818 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:32:35,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:32:35,822 INFO L85 PathProgramCache]: Analyzing trace with hash -2107540184, now seen corresponding path program 1 times [2021-11-25 19:32:35,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:32:35,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136911945] [2021-11-25 19:32:35,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:32:35,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:32:35,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:32:35,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:32:35,910 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:32:35,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136911945] [2021-11-25 19:32:35,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136911945] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:32:35,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148359443] [2021-11-25 19:32:35,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:32:35,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:32:35,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:32:35,919 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:32:35,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:32:35,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:32:35,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:32:35,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:32:36,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:32:36,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:32:36,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:32:36,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148359443] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:32:36,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2117027963] [2021-11-25 19:32:36,119 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-25 19:32:36,119 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:32:36,123 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:32:36,130 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:32:36,131 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:32:36,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:36,346 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:32:36,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2021-11-25 19:32:36,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:36,398 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 19:32:36,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 19:32:36,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:36,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 19:32:36,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:36,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:36,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 42 [2021-11-25 19:32:36,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:36,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:36,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:36,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:36,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:36,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:36,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:36,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:36,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:36,621 INFO L354 Elim1Store]: treesize reduction 82, result has 15.5 percent of original size [2021-11-25 19:32:36,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 214 treesize of output 215 [2021-11-25 19:32:36,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:36,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 27 [2021-11-25 19:32:36,790 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:32:36,909 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '81#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~x~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem3#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (- 4) (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.base| 0))' at error location [2021-11-25 19:32:36,910 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:32:36,910 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:32:36,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-11-25 19:32:36,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242379305] [2021-11-25 19:32:36,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:32:36,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 19:32:36,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:32:36,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 19:32:36,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-25 19:32:36,913 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:32:36,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:32:36,932 INFO L93 Difference]: Finished difference Result 16 states and 20 transitions. [2021-11-25 19:32:36,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:32:36,933 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-25 19:32:36,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:32:36,933 INFO L225 Difference]: With dead ends: 16 [2021-11-25 19:32:36,933 INFO L226 Difference]: Without dead ends: 11 [2021-11-25 19:32:36,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-25 19:32:36,935 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:32:36,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:32:36,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-25 19:32:36,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-25 19:32:36,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:32:36,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-11-25 19:32:36,939 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2021-11-25 19:32:36,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:32:36,940 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-11-25 19:32:36,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:32:36,940 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-11-25 19:32:36,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 19:32:36,940 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:32:36,941 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2021-11-25 19:32:36,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:32:37,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:32:37,155 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:32:37,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:32:37,155 INFO L85 PathProgramCache]: Analyzing trace with hash -732370315, now seen corresponding path program 2 times [2021-11-25 19:32:37,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:32:37,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200806543] [2021-11-25 19:32:37,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:32:37,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:32:37,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:32:37,273 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:32:37,273 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:32:37,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200806543] [2021-11-25 19:32:37,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200806543] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:32:37,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550367637] [2021-11-25 19:32:37,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:32:37,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:32:37,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:32:37,280 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:32:37,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:32:37,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 19:32:37,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:32:37,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:32:37,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:32:37,389 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:32:37,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:32:37,472 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:32:37,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550367637] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:32:37,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [831233662] [2021-11-25 19:32:37,477 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-25 19:32:37,477 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:32:37,478 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:32:37,478 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:32:37,478 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:32:37,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:37,524 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 19:32:37,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 19:32:37,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:37,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 19:32:37,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:37,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 19:32:37,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:37,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:37,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 42 [2021-11-25 19:32:37,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:37,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:37,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:37,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:37,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:37,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:37,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:37,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:37,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:37,738 INFO L354 Elim1Store]: treesize reduction 87, result has 10.3 percent of original size [2021-11-25 19:32:37,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 214 treesize of output 210 [2021-11-25 19:32:37,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:37,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 27 [2021-11-25 19:32:37,850 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:32:37,973 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '186#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~x~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem3#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (- 4) (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.base| 0))' at error location [2021-11-25 19:32:37,974 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:32:37,974 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:32:37,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2021-11-25 19:32:37,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92360865] [2021-11-25 19:32:37,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:32:37,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-25 19:32:37,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:32:37,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-25 19:32:37,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-11-25 19:32:37,978 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:32:38,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:32:38,019 INFO L93 Difference]: Finished difference Result 22 states and 29 transitions. [2021-11-25 19:32:38,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 19:32:38,022 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-25 19:32:38,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:32:38,024 INFO L225 Difference]: With dead ends: 22 [2021-11-25 19:32:38,025 INFO L226 Difference]: Without dead ends: 17 [2021-11-25 19:32:38,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-11-25 19:32:38,029 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:32:38,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:32:38,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-25 19:32:38,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-25 19:32:38,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:32:38,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-11-25 19:32:38,039 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 9 [2021-11-25 19:32:38,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:32:38,039 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-11-25 19:32:38,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:32:38,040 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-11-25 19:32:38,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-25 19:32:38,040 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:32:38,041 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1] [2021-11-25 19:32:38,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 19:32:38,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:32:38,241 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:32:38,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:32:38,242 INFO L85 PathProgramCache]: Analyzing trace with hash 165862805, now seen corresponding path program 3 times [2021-11-25 19:32:38,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:32:38,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187469924] [2021-11-25 19:32:38,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:32:38,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:32:38,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:32:38,402 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:32:38,402 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:32:38,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187469924] [2021-11-25 19:32:38,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187469924] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:32:38,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775522132] [2021-11-25 19:32:38,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:32:38,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:32:38,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:32:38,411 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:32:38,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 19:32:38,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:32:38,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:32:38,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 19:32:38,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:32:38,540 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:32:38,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:32:38,780 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:32:38,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775522132] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:32:38,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1770327800] [2021-11-25 19:32:38,783 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-25 19:32:38,783 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:32:38,783 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:32:38,783 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:32:38,784 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:32:38,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:38,818 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 19:32:38,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 19:32:38,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:38,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 19:32:38,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:38,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 19:32:38,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:38,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:38,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:38,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 50 [2021-11-25 19:32:38,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:38,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:38,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:38,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:38,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:38,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:38,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:38,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:38,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:38,929 INFO L354 Elim1Store]: treesize reduction 68, result has 1.4 percent of original size [2021-11-25 19:32:38,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 227 treesize of output 212 [2021-11-25 19:32:39,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:39,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 27 [2021-11-25 19:32:39,017 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:32:39,132 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '363#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~x~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem3#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (- 4) (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.base| 0))' at error location [2021-11-25 19:32:39,132 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:32:39,133 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:32:39,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2021-11-25 19:32:39,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203445127] [2021-11-25 19:32:39,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:32:39,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-25 19:32:39,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:32:39,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-25 19:32:39,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=498, Unknown=0, NotChecked=0, Total=812 [2021-11-25 19:32:39,135 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 25 states, 25 states have (on average 1.16) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:32:39,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:32:39,178 INFO L93 Difference]: Finished difference Result 34 states and 47 transitions. [2021-11-25 19:32:39,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-25 19:32:39,178 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-25 19:32:39,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:32:39,179 INFO L225 Difference]: With dead ends: 34 [2021-11-25 19:32:39,179 INFO L226 Difference]: Without dead ends: 29 [2021-11-25 19:32:39,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=314, Invalid=498, Unknown=0, NotChecked=0, Total=812 [2021-11-25 19:32:39,181 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:32:39,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:32:39,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-25 19:32:39,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-25 19:32:39,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:32:39,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-11-25 19:32:39,187 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 15 [2021-11-25 19:32:39,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:32:39,188 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-11-25 19:32:39,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:32:39,188 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-11-25 19:32:39,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-25 19:32:39,189 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:32:39,189 INFO L514 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1] [2021-11-25 19:32:39,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:32:39,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:32:39,413 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:32:39,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:32:39,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1152893995, now seen corresponding path program 4 times [2021-11-25 19:32:39,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:32:39,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941293404] [2021-11-25 19:32:39,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:32:39,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:32:39,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:32:39,784 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:32:39,784 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:32:39,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941293404] [2021-11-25 19:32:39,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941293404] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:32:39,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27920878] [2021-11-25 19:32:39,785 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:32:39,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:32:39,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:32:39,786 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:32:39,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 19:32:39,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:32:39,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-25 19:32:39,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:32:39,945 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:32:39,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:32:40,729 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:32:40,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27920878] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:32:40,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1737101026] [2021-11-25 19:32:40,731 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-25 19:32:40,731 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:32:40,731 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:32:40,732 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:32:40,732 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:32:40,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:40,761 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:32:40,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2021-11-25 19:32:40,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:40,783 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 19:32:40,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 19:32:40,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:40,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 19:32:40,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:40,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:40,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 42 [2021-11-25 19:32:40,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:40,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:40,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:40,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:40,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:40,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:40,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:40,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:40,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:40,892 INFO L354 Elim1Store]: treesize reduction 87, result has 10.3 percent of original size [2021-11-25 19:32:40,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 214 treesize of output 210 [2021-11-25 19:32:40,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:40,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 27 [2021-11-25 19:32:40,971 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:32:41,133 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '684#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~x~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem3#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (- 4) (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.base| 0))' at error location [2021-11-25 19:32:41,133 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:32:41,133 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:32:41,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2021-11-25 19:32:41,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28666625] [2021-11-25 19:32:41,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:32:41,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-25 19:32:41,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:32:41,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-25 19:32:41,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1190, Invalid=1566, Unknown=0, NotChecked=0, Total=2756 [2021-11-25 19:32:41,137 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:32:41,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:32:41,229 INFO L93 Difference]: Finished difference Result 58 states and 83 transitions. [2021-11-25 19:32:41,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-25 19:32:41,230 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-25 19:32:41,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:32:41,231 INFO L225 Difference]: With dead ends: 58 [2021-11-25 19:32:41,231 INFO L226 Difference]: Without dead ends: 53 [2021-11-25 19:32:41,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1190, Invalid=1566, Unknown=0, NotChecked=0, Total=2756 [2021-11-25 19:32:41,233 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:32:41,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:32:41,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-25 19:32:41,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-11-25 19:32:41,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:32:41,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-11-25 19:32:41,242 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 27 [2021-11-25 19:32:41,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:32:41,243 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-11-25 19:32:41,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:32:41,243 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-11-25 19:32:41,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-25 19:32:41,245 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:32:41,245 INFO L514 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1] [2021-11-25 19:32:41,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 19:32:41,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:32:41,460 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:32:41,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:32:41,460 INFO L85 PathProgramCache]: Analyzing trace with hash 353425493, now seen corresponding path program 5 times [2021-11-25 19:32:41,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:32:41,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371879413] [2021-11-25 19:32:41,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:32:41,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:32:41,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:32:42,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:32:42,675 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:32:42,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371879413] [2021-11-25 19:32:42,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371879413] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:32:42,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41052023] [2021-11-25 19:32:42,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:32:42,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:32:42,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:32:42,685 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:32:42,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 19:33:11,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-11-25 19:33:11,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:33:11,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-25 19:33:11,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:33:11,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:33:11,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:33:14,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:33:14,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41052023] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:33:14,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [793944106] [2021-11-25 19:33:14,699 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-25 19:33:14,699 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:33:14,700 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:33:14,700 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:33:14,700 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:33:14,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:14,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 19:33:14,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:14,750 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 19:33:14,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 19:33:14,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:14,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 19:33:14,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:14,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:14,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 42 [2021-11-25 19:33:14,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:14,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:14,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:14,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:14,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:14,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:14,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:33:14,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:14,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:14,857 INFO L354 Elim1Store]: treesize reduction 82, result has 15.5 percent of original size [2021-11-25 19:33:14,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 218 treesize of output 217 [2021-11-25 19:33:14,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:14,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 27 [2021-11-25 19:33:14,952 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:33:15,170 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1293#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~x~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem3#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (- 4) (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.base| 0))' at error location [2021-11-25 19:33:15,171 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:33:15,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:33:15,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2021-11-25 19:33:15,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838729968] [2021-11-25 19:33:15,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:33:15,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-11-25 19:33:15,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:33:15,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-11-25 19:33:15,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4670, Invalid=5430, Unknown=0, NotChecked=0, Total=10100 [2021-11-25 19:33:15,183 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 96 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:33:15,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:33:15,485 INFO L93 Difference]: Finished difference Result 106 states and 155 transitions. [2021-11-25 19:33:15,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-25 19:33:15,486 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 96 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-25 19:33:15,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:33:15,491 INFO L225 Difference]: With dead ends: 106 [2021-11-25 19:33:15,491 INFO L226 Difference]: Without dead ends: 101 [2021-11-25 19:33:15,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4670, Invalid=5430, Unknown=0, NotChecked=0, Total=10100 [2021-11-25 19:33:15,499 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:33:15,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:33:15,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-25 19:33:15,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-11-25 19:33:15,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:33:15,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2021-11-25 19:33:15,526 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 51 [2021-11-25 19:33:15,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:33:15,526 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2021-11-25 19:33:15,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 96 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:33:15,527 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2021-11-25 19:33:15,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-25 19:33:15,532 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:33:15,533 INFO L514 BasicCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1] [2021-11-25 19:33:15,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 19:33:15,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:33:15,734 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:33:15,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:33:15,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1717145941, now seen corresponding path program 6 times [2021-11-25 19:33:15,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:33:15,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782092603] [2021-11-25 19:33:15,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:33:15,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:33:15,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:33:19,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:33:19,098 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:33:19,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782092603] [2021-11-25 19:33:19,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782092603] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:33:19,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077805871] [2021-11-25 19:33:19,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:33:19,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:33:19,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:33:19,099 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:33:19,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 19:33:19,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:33:19,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:33:19,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 712 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-25 19:33:19,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:33:19,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:33:19,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:33:28,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:33:28,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077805871] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:33:28,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1130072409] [2021-11-25 19:33:28,411 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-25 19:33:28,411 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:33:28,412 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:33:28,412 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:33:28,412 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:33:28,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:28,451 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:33:28,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2021-11-25 19:33:28,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:28,478 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 19:33:28,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 19:33:28,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:28,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 19:33:28,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:28,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:33:28,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:28,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 50 [2021-11-25 19:33:28,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:28,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:28,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:28,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:28,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:28,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:28,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:33:28,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:28,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:28,563 INFO L354 Elim1Store]: treesize reduction 68, result has 1.4 percent of original size [2021-11-25 19:33:28,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 227 treesize of output 212 [2021-11-25 19:33:28,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:28,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 27 [2021-11-25 19:33:28,612 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:33:28,892 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2478#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~x~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem3#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (- 4) (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.base| 0))' at error location [2021-11-25 19:33:28,892 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:33:28,892 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:33:28,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 192 [2021-11-25 19:33:28,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88175047] [2021-11-25 19:33:28,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:33:28,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2021-11-25 19:33:28,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:33:28,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2021-11-25 19:33:28,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18542, Invalid=20070, Unknown=0, NotChecked=0, Total=38612 [2021-11-25 19:33:28,916 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 193 states, 193 states have (on average 1.0207253886010363) internal successors, (197), 192 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:33:29,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:33:29,413 INFO L93 Difference]: Finished difference Result 202 states and 299 transitions. [2021-11-25 19:33:29,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2021-11-25 19:33:29,414 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 1.0207253886010363) internal successors, (197), 192 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-11-25 19:33:29,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:33:29,419 INFO L225 Difference]: With dead ends: 202 [2021-11-25 19:33:29,419 INFO L226 Difference]: Without dead ends: 197 [2021-11-25 19:33:29,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1516 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=18542, Invalid=20070, Unknown=0, NotChecked=0, Total=38612 [2021-11-25 19:33:29,424 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:33:29,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:33:29,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-25 19:33:29,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2021-11-25 19:33:29,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.010204081632653) internal successors, (198), 196 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:33:29,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2021-11-25 19:33:29,455 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 99 [2021-11-25 19:33:29,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:33:29,457 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2021-11-25 19:33:29,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 1.0207253886010363) internal successors, (197), 192 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:33:29,458 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2021-11-25 19:33:29,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-25 19:33:29,467 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:33:29,467 INFO L514 BasicCegarLoop]: trace histogram [190, 1, 1, 1, 1, 1] [2021-11-25 19:33:29,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 19:33:29,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:33:29,696 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:33:29,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:33:29,696 INFO L85 PathProgramCache]: Analyzing trace with hash -842464427, now seen corresponding path program 7 times [2021-11-25 19:33:29,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:33:29,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585532036] [2021-11-25 19:33:29,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:33:29,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:33:30,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:33:42,338 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:33:42,339 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:33:42,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585532036] [2021-11-25 19:33:42,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585532036] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:33:42,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811720138] [2021-11-25 19:33:42,339 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:33:42,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:33:42,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:33:42,340 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:33:42,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 19:33:42,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:33:42,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 1384 conjuncts, 192 conjunts are in the unsatisfiable core [2021-11-25 19:33:42,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:33:43,254 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:33:43,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:34:18,553 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:34:18,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811720138] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:34:18,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1861421402] [2021-11-25 19:34:18,555 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-25 19:34:18,556 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:34:18,556 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:34:18,556 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:34:18,556 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:34:18,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:34:18,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 19:34:18,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:34:18,594 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:34:18,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2021-11-25 19:34:18,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:34:18,619 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 19:34:18,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 19:34:18,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:34:18,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:34:18,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:34:18,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 50 [2021-11-25 19:34:18,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:34:18,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:34:18,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:34:18,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:34:18,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:34:18,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:34:18,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:34:18,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:34:18,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:34:18,709 INFO L354 Elim1Store]: treesize reduction 68, result has 1.4 percent of original size [2021-11-25 19:34:18,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 227 treesize of output 212 [2021-11-25 19:34:18,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:34:18,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 27 [2021-11-25 19:34:18,764 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:34:19,214 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4815#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~x~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem3#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (- 4) (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.base| 0))' at error location [2021-11-25 19:34:19,215 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:34:19,215 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:34:19,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 384 [2021-11-25 19:34:19,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739154320] [2021-11-25 19:34:19,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:34:19,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2021-11-25 19:34:19,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:34:19,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2021-11-25 19:34:19,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73934, Invalid=76998, Unknown=0, NotChecked=0, Total=150932 [2021-11-25 19:34:19,252 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand has 385 states, 385 states have (on average 1.0103896103896104) internal successors, (389), 384 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:34:21,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:34:21,434 INFO L93 Difference]: Finished difference Result 394 states and 587 transitions. [2021-11-25 19:34:21,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2021-11-25 19:34:21,437 INFO L78 Accepts]: Start accepts. Automaton has has 385 states, 385 states have (on average 1.0103896103896104) internal successors, (389), 384 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-11-25 19:34:21,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:34:21,440 INFO L225 Difference]: With dead ends: 394 [2021-11-25 19:34:21,440 INFO L226 Difference]: Without dead ends: 389 [2021-11-25 19:34:21,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 775 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 387 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3052 ImplicationChecksByTransitivity, 46.7s TimeCoverageRelationStatistics Valid=73934, Invalid=76998, Unknown=0, NotChecked=0, Total=150932 [2021-11-25 19:34:21,452 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:34:21,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 19:34:21,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-11-25 19:34:21,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 389. [2021-11-25 19:34:21,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 1.0051546391752577) internal successors, (390), 388 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:34:21,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 390 transitions. [2021-11-25 19:34:21,477 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 390 transitions. Word has length 195 [2021-11-25 19:34:21,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:34:21,477 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 390 transitions. [2021-11-25 19:34:21,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 385 states, 385 states have (on average 1.0103896103896104) internal successors, (389), 384 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:34:21,478 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 390 transitions. [2021-11-25 19:34:21,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2021-11-25 19:34:21,485 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:34:21,485 INFO L514 BasicCegarLoop]: trace histogram [382, 1, 1, 1, 1, 1] [2021-11-25 19:34:21,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 19:34:21,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-25 19:34:21,700 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:34:21,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:34:21,700 INFO L85 PathProgramCache]: Analyzing trace with hash 538961749, now seen corresponding path program 8 times [2021-11-25 19:34:21,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:34:21,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987190851] [2021-11-25 19:34:21,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:34:21,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:34:23,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:35:09,841 INFO L134 CoverageAnalysis]: Checked inductivity of 73153 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:35:09,842 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:35:09,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987190851] [2021-11-25 19:35:09,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987190851] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:35:09,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810777166] [2021-11-25 19:35:09,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:35:09,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:35:09,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:35:09,864 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:35:09,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2234ab5e-6550-42f3-9fa7-87d886a3f8f5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process