./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs --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 8826306ae53b4154d29530d9da06b16418244e52 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs --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 8826306ae53b4154d29530d9da06b16418244e52 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:22:48,882 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:22:48,885 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:22:48,946 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:22:48,946 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:22:48,948 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:22:48,949 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:22:48,952 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:22:48,954 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:22:48,955 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:22:48,956 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:22:48,957 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:22:48,958 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:22:48,959 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:22:48,961 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:22:48,962 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:22:48,967 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:22:48,968 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:22:48,970 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:22:48,973 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:22:48,975 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:22:48,982 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:22:48,984 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:22:48,985 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:22:48,989 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:22:48,989 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:22:48,990 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:22:48,991 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:22:48,992 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:22:48,993 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:22:49,002 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:22:49,004 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:22:49,006 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:22:49,007 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:22:49,009 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:22:49,009 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:22:49,010 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:22:49,010 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:22:49,010 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:22:49,012 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:22:49,012 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:22:49,013 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 02:22:49,051 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:22:49,051 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:22:49,052 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:22:49,052 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:22:49,052 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:22:49,052 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:22:49,053 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:22:49,053 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:22:49,053 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:22:49,053 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:22:49,053 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:22:49,054 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:22:49,054 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:22:49,054 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:22:49,054 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:22:49,055 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:22:49,055 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:22:49,055 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:22:49,056 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:22:49,056 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:22:49,056 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:22:49,056 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:22:49,056 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:22:49,057 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:22:49,057 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:22:49,057 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:22:49,057 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:22:49,058 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:22:49,058 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:22:49,058 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:22:49,058 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:22:49,059 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:22:49,059 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:22:49,059 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:22:49,059 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:22:49,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:22:49,060 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:22:49,060 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:22:49,060 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:22:49,060 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_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8826306ae53b4154d29530d9da06b16418244e52 [2021-10-16 02:22:49,283 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:22:49,304 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:22:49,306 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:22:49,307 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:22:49,308 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:22:49,309 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound10.c [2021-10-16 02:22:49,363 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/data/5c2568576/4b944ad262874d6f9f4ddb7305ff701b/FLAG723098888 [2021-10-16 02:22:49,863 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:22:49,864 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound10.c [2021-10-16 02:22:49,870 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/data/5c2568576/4b944ad262874d6f9f4ddb7305ff701b/FLAG723098888 [2021-10-16 02:22:50,173 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/data/5c2568576/4b944ad262874d6f9f4ddb7305ff701b [2021-10-16 02:22:50,175 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:22:50,177 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:22:50,178 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:22:50,178 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:22:50,181 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:22:50,182 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:22:50" (1/1) ... [2021-10-16 02:22:50,183 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c73fdb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:22:50, skipping insertion in model container [2021-10-16 02:22:50,183 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:22:50" (1/1) ... [2021-10-16 02:22:50,189 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:22:50,203 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:22:50,333 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound10.c[573,586] [2021-10-16 02:22:50,373 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:22:50,382 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:22:50,394 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound10.c[573,586] [2021-10-16 02:22:50,400 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:22:50,412 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:22:50,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:22:50 WrapperNode [2021-10-16 02:22:50,413 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:22:50,414 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:22:50,415 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:22:50,415 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:22:50,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:22:50" (1/1) ... [2021-10-16 02:22:50,429 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:22:50" (1/1) ... [2021-10-16 02:22:50,448 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:22:50,449 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:22:50,449 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:22:50,449 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:22:50,457 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:22:50" (1/1) ... [2021-10-16 02:22:50,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:22:50" (1/1) ... [2021-10-16 02:22:50,459 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:22:50" (1/1) ... [2021-10-16 02:22:50,459 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:22:50" (1/1) ... [2021-10-16 02:22:50,463 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:22:50" (1/1) ... [2021-10-16 02:22:50,467 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:22:50" (1/1) ... [2021-10-16 02:22:50,468 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:22:50" (1/1) ... [2021-10-16 02:22:50,470 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:22:50,471 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:22:50,471 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:22:50,471 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:22:50,472 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:22:50" (1/1) ... [2021-10-16 02:22:50,479 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:22:50,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:22:50,506 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:22:50,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:22:50,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 02:22:50,552 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:22:50,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:22:50,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:22:50,958 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:22:50,958 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-10-16 02:22:50,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:22:50 BoogieIcfgContainer [2021-10-16 02:22:50,974 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:22:50,976 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:22:50,976 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:22:50,992 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:22:50,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:22:50" (1/3) ... [2021-10-16 02:22:50,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c177827 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:22:50, skipping insertion in model container [2021-10-16 02:22:50,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:22:50" (2/3) ... [2021-10-16 02:22:50,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c177827 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:22:50, skipping insertion in model container [2021-10-16 02:22:50,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:22:50" (3/3) ... [2021-10-16 02:22:50,994 INFO L111 eAbstractionObserver]: Analyzing ICFG mannadiv_unwindbound10.c [2021-10-16 02:22:50,999 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:22:50,999 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-16 02:22:51,045 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:22:51,052 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, mConcurrency=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 [2021-10-16 02:22:51,052 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-16 02:22:51,066 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 10 states have (on average 1.7) 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) [2021-10-16 02:22:51,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-16 02:22:51,071 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:22:51,072 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-16 02:22:51,072 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:22:51,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:22:51,078 INFO L82 PathProgramCache]: Analyzing trace with hash 100327247, now seen corresponding path program 1 times [2021-10-16 02:22:51,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:22:51,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526716155] [2021-10-16 02:22:51,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:22:51,089 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:22:51,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:22:51,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:22:51,232 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:22:51,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526716155] [2021-10-16 02:22:51,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526716155] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:22:51,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:22:51,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:22:51,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313101618] [2021-10-16 02:22:51,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-16 02:22:51,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:22:51,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-16 02:22:51,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 02:22:51,256 INFO L87 Difference]: Start difference. First operand has 13 states, 10 states have (on average 1.7) 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) Second operand has 2 states, 2 states have (on average 2.5) 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) [2021-10-16 02:22:51,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:22:51,269 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2021-10-16 02:22:51,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-16 02:22:51,271 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) 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 [2021-10-16 02:22:51,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:22:51,279 INFO L225 Difference]: With dead ends: 25 [2021-10-16 02:22:51,279 INFO L226 Difference]: Without dead ends: 11 [2021-10-16 02:22:51,281 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 02:22:51,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-10-16 02:22:51,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-10-16 02:22:51,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 9 states have (on average 1.3333333333333333) 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) [2021-10-16 02:22:51,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-10-16 02:22:51,310 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 5 [2021-10-16 02:22:51,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:22:51,311 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-10-16 02:22:51,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) 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) [2021-10-16 02:22:51,312 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-10-16 02:22:51,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-16 02:22:51,312 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:22:51,312 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-16 02:22:51,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 02:22:51,313 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:22:51,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:22:51,314 INFO L82 PathProgramCache]: Analyzing trace with hash 99468274, now seen corresponding path program 1 times [2021-10-16 02:22:51,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:22:51,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841828084] [2021-10-16 02:22:51,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:22:51,315 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:22:51,334 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:22:51,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2073428109] [2021-10-16 02:22:51,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:22:51,335 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:22:51,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:22:51,350 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:22:51,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 02:22:51,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:22:51,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:22:51,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:22:51,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:22:51,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:22:51,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:22:51,755 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:22:51,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841828084] [2021-10-16 02:22:51,755 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:22:51,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073428109] [2021-10-16 02:22:51,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073428109] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:22:51,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:22:51,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-16 02:22:51,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304729247] [2021-10-16 02:22:51,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 02:22:51,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:22:51,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 02:22:51,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:22:51,794 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:51,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:22:51,865 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-10-16 02:22:51,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:22:51,866 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-16 02:22:51,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:22:51,867 INFO L225 Difference]: With dead ends: 25 [2021-10-16 02:22:51,867 INFO L226 Difference]: Without dead ends: 23 [2021-10-16 02:22:51,869 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.4ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:22:51,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-16 02:22:51,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 14. [2021-10-16 02:22:51,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:51,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-10-16 02:22:51,879 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 5 [2021-10-16 02:22:51,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:22:51,879 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-10-16 02:22:51,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:51,880 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-10-16 02:22:51,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-16 02:22:51,881 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:22:51,881 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-16 02:22:51,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:22:52,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:22:52,098 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:22:52,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:22:52,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1211488473, now seen corresponding path program 1 times [2021-10-16 02:22:52,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:22:52,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182751403] [2021-10-16 02:22:52,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:22:52,100 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:22:52,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:22:52,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:22:52,198 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:22:52,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182751403] [2021-10-16 02:22:52,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182751403] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:22:52,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:22:52,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:22:52,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728604339] [2021-10-16 02:22:52,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:22:52,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:22:52,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:22:52,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:22:52,200 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:52,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:22:52,219 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2021-10-16 02:22:52,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:22:52,221 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-16 02:22:52,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:22:52,222 INFO L225 Difference]: With dead ends: 18 [2021-10-16 02:22:52,222 INFO L226 Difference]: Without dead ends: 14 [2021-10-16 02:22:52,222 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:22:52,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-10-16 02:22:52,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-10-16 02:22:52,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:52,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-10-16 02:22:52,225 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 6 [2021-10-16 02:22:52,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:22:52,226 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-10-16 02:22:52,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:52,226 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-10-16 02:22:52,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 02:22:52,226 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:22:52,227 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:22:52,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-16 02:22:52,227 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:22:52,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:22:52,228 INFO L82 PathProgramCache]: Analyzing trace with hash -263176832, now seen corresponding path program 1 times [2021-10-16 02:22:52,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:22:52,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755908982] [2021-10-16 02:22:52,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:22:52,229 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:22:52,240 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:22:52,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1924482726] [2021-10-16 02:22:52,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:22:52,241 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:22:52,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:22:52,242 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:22:52,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-16 02:22:52,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:22:52,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:22:52,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:22:52,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:22:52,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:22:52,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:22:52,515 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:22:52,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755908982] [2021-10-16 02:22:52,517 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:22:52,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924482726] [2021-10-16 02:22:52,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924482726] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:22:52,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:22:52,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-10-16 02:22:52,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710181081] [2021-10-16 02:22:52,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:22:52,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:22:52,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:22:52,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:22:52,521 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 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) [2021-10-16 02:22:52,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:22:52,623 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2021-10-16 02:22:52,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:22:52,624 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 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 8 [2021-10-16 02:22:52,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:22:52,625 INFO L225 Difference]: With dead ends: 18 [2021-10-16 02:22:52,625 INFO L226 Difference]: Without dead ends: 12 [2021-10-16 02:22:52,626 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 98.2ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:22:52,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-10-16 02:22:52,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2021-10-16 02:22:52,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 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) [2021-10-16 02:22:52,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2021-10-16 02:22:52,630 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2021-10-16 02:22:52,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:22:52,631 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2021-10-16 02:22:52,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 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) [2021-10-16 02:22:52,631 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2021-10-16 02:22:52,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-16 02:22:52,632 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:22:52,632 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:22:52,658 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-10-16 02:22:52,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:22:52,846 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:22:52,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:22:52,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1349036158, now seen corresponding path program 1 times [2021-10-16 02:22:52,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:22:52,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236395712] [2021-10-16 02:22:52,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:22:52,847 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:22:52,859 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:22:52,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [401342372] [2021-10-16 02:22:52,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:22:52,860 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:22:52,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:22:52,861 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:22:52,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-16 02:22:52,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:22:52,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:22:52,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:22:52,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:22:52,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:22:53,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:22:53,030 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:22:53,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236395712] [2021-10-16 02:22:53,034 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:22:53,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401342372] [2021-10-16 02:22:53,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401342372] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:22:53,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [84004552] [2021-10-16 02:22:53,059 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-16 02:22:53,059 INFO L166 IcfgInterpreter]: Building call graph [2021-10-16 02:22:53,064 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-16 02:22:53,079 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-16 02:22:53,084 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-16 02:22:53,134 INFO L180 QuantifierPusher]: treesize reduction 5, result has 97.1 percent of original size [2021-10-16 02:22:53,140 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:22:53,142 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:22:53,143 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-16 02:22:53,146 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:22:53,147 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:22:53,148 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-16 02:22:53,156 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-10-16 02:22:53,213 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-16 02:22:53,213 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:22:53,214 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-16 02:22:53,214 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:22:53,215 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-16 02:22:53,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-16 02:22:53,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:22:53,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:22:53,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:22:53,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-16 02:22:53,236 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:22:53,237 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-16 02:22:53,238 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:22:53,238 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-16 02:22:53,238 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-16 02:22:53,240 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:22:53,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:22:53,277 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:22:53,281 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 159 [2021-10-16 02:22:53,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-16 02:22:53,282 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:312, output treesize:159 [2021-10-16 02:22:53,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-16 02:22:53,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:22:53,499 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#valid_22| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-16 02:22:53,502 INFO L168 Benchmark]: Toolchain (without parser) took 3325.26 ms. Allocated memory was 130.0 MB in the beginning and 178.3 MB in the end (delta: 48.2 MB). Free memory was 106.0 MB in the beginning and 93.1 MB in the end (delta: 12.9 MB). Peak memory consumption was 59.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:22:53,503 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 130.0 MB. Free memory is still 86.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:22:53,503 INFO L168 Benchmark]: CACSL2BoogieTranslator took 235.81 ms. Allocated memory was 130.0 MB in the beginning and 178.3 MB in the end (delta: 48.2 MB). Free memory was 105.7 MB in the beginning and 151.8 MB in the end (delta: -46.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:22:53,504 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.62 ms. Allocated memory is still 178.3 MB. Free memory was 151.8 MB in the beginning and 150.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:22:53,504 INFO L168 Benchmark]: Boogie Preprocessor took 21.56 ms. Allocated memory is still 178.3 MB. Free memory was 150.0 MB in the beginning and 149.3 MB in the end (delta: 703.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:22:53,505 INFO L168 Benchmark]: RCFGBuilder took 503.60 ms. Allocated memory is still 178.3 MB. Free memory was 148.9 MB in the beginning and 135.1 MB in the end (delta: 13.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-16 02:22:53,505 INFO L168 Benchmark]: TraceAbstraction took 2525.10 ms. Allocated memory is still 178.3 MB. Free memory was 134.7 MB in the beginning and 93.1 MB in the end (delta: 41.6 MB). Peak memory consumption was 42.8 MB. Max. memory is 16.1 GB. [2021-10-16 02:22:53,508 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 130.0 MB. Free memory is still 86.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 235.81 ms. Allocated memory was 130.0 MB in the beginning and 178.3 MB in the end (delta: 48.2 MB). Free memory was 105.7 MB in the beginning and 151.8 MB in the end (delta: -46.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.62 ms. Allocated memory is still 178.3 MB. Free memory was 151.8 MB in the beginning and 150.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.56 ms. Allocated memory is still 178.3 MB. Free memory was 150.0 MB in the beginning and 149.3 MB in the end (delta: 703.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 503.60 ms. Allocated memory is still 178.3 MB. Free memory was 148.9 MB in the beginning and 135.1 MB in the end (delta: 13.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2525.10 ms. Allocated memory is still 178.3 MB. Free memory was 134.7 MB in the beginning and 93.1 MB in the end (delta: 41.6 MB). Peak memory consumption was 42.8 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#valid_22| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_22|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-16 02:22:53,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:22:55,992 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:22:55,993 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:22:56,031 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:22:56,032 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:22:56,033 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:22:56,035 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:22:56,037 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:22:56,039 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:22:56,040 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:22:56,041 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:22:56,043 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:22:56,043 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:22:56,044 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:22:56,046 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:22:56,047 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:22:56,048 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:22:56,050 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:22:56,052 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:22:56,054 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:22:56,058 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:22:56,063 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:22:56,065 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:22:56,066 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:22:56,071 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:22:56,079 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:22:56,079 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:22:56,081 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:22:56,081 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:22:56,082 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:22:56,084 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:22:56,085 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:22:56,086 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:22:56,087 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:22:56,089 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:22:56,089 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:22:56,090 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:22:56,090 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:22:56,091 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:22:56,092 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:22:56,093 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:22:56,094 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-16 02:22:56,127 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:22:56,127 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:22:56,128 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:22:56,128 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:22:56,129 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:22:56,129 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:22:56,129 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:22:56,129 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:22:56,130 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:22:56,130 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:22:56,131 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:22:56,131 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:22:56,131 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:22:56,131 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:22:56,132 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:22:56,132 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:22:56,132 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:22:56,132 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 02:22:56,132 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 02:22:56,133 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:22:56,133 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:22:56,133 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:22:56,133 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:22:56,134 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:22:56,134 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 02:22:56,134 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:22:56,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:22:56,135 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:22:56,135 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:22:56,135 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:22:56,135 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 02:22:56,135 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 02:22:56,136 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:22:56,136 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:22:56,136 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:22:56,136 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8826306ae53b4154d29530d9da06b16418244e52 [2021-10-16 02:22:56,477 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:22:56,504 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:22:56,506 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:22:56,507 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:22:56,510 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:22:56,510 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound10.c [2021-10-16 02:22:56,590 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/data/02458475d/c6b7aa1d97ea49d68de3631c48f46a35/FLAG0a634f688 [2021-10-16 02:22:57,176 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:22:57,176 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound10.c [2021-10-16 02:22:57,183 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/data/02458475d/c6b7aa1d97ea49d68de3631c48f46a35/FLAG0a634f688 [2021-10-16 02:22:57,556 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/data/02458475d/c6b7aa1d97ea49d68de3631c48f46a35 [2021-10-16 02:22:57,560 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:22:57,562 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:22:57,564 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:22:57,565 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:22:57,568 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:22:57,568 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:22:57" (1/1) ... [2021-10-16 02:22:57,569 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75a35c07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:22:57, skipping insertion in model container [2021-10-16 02:22:57,570 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:22:57" (1/1) ... [2021-10-16 02:22:57,577 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:22:57,595 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:22:57,765 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound10.c[573,586] [2021-10-16 02:22:57,780 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:22:57,804 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:22:57,820 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound10.c[573,586] [2021-10-16 02:22:57,832 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:22:57,853 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:22:57,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:22:57 WrapperNode [2021-10-16 02:22:57,854 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:22:57,855 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:22:57,855 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:22:57,855 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:22:57,862 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:22:57" (1/1) ... [2021-10-16 02:22:57,872 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:22:57" (1/1) ... [2021-10-16 02:22:57,898 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:22:57,898 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:22:57,899 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:22:57,899 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:22:57,906 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:22:57" (1/1) ... [2021-10-16 02:22:57,907 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:22:57" (1/1) ... [2021-10-16 02:22:57,920 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:22:57" (1/1) ... [2021-10-16 02:22:57,921 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:22:57" (1/1) ... [2021-10-16 02:22:57,930 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:22:57" (1/1) ... [2021-10-16 02:22:57,935 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:22:57" (1/1) ... [2021-10-16 02:22:57,942 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:22:57" (1/1) ... [2021-10-16 02:22:57,945 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:22:57,948 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:22:57,949 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:22:57,949 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:22:57,950 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:22:57" (1/1) ... [2021-10-16 02:22:57,965 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:22:57,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:22:57,989 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:22:58,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:22:58,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 02:22:58,041 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:22:58,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:22:58,041 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:22:58,392 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:22:58,392 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-10-16 02:22:58,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:22:58 BoogieIcfgContainer [2021-10-16 02:22:58,394 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:22:58,396 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:22:58,396 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:22:58,399 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:22:58,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:22:57" (1/3) ... [2021-10-16 02:22:58,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f164232 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:22:58, skipping insertion in model container [2021-10-16 02:22:58,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:22:57" (2/3) ... [2021-10-16 02:22:58,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f164232 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:22:58, skipping insertion in model container [2021-10-16 02:22:58,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:22:58" (3/3) ... [2021-10-16 02:22:58,403 INFO L111 eAbstractionObserver]: Analyzing ICFG mannadiv_unwindbound10.c [2021-10-16 02:22:58,408 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:22:58,408 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-16 02:22:58,451 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:22:58,458 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, mConcurrency=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 [2021-10-16 02:22:58,458 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-16 02:22:58,471 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:58,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-16 02:22:58,477 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:22:58,477 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:22:58,478 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:22:58,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:22:58,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1235340721, now seen corresponding path program 1 times [2021-10-16 02:22:58,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:22:58,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [417421671] [2021-10-16 02:22:58,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:22:58,503 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:22:58,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:22:58,506 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:22:58,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 02:22:58,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:22:58,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-16 02:22:58,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:22:58,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:22:58,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:22:58,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:22:58,700 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:22:58,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [417421671] [2021-10-16 02:22:58,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [417421671] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:22:58,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:22:58,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-16 02:22:58,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957566819] [2021-10-16 02:22:58,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-16 02:22:58,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:22:58,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-16 02:22:58,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 02:22:58,723 INFO L87 Difference]: Start difference. First operand has 21 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2021-10-16 02:22:58,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:22:58,737 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2021-10-16 02:22:58,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-16 02:22:58,738 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-16 02:22:58,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:22:58,746 INFO L225 Difference]: With dead ends: 39 [2021-10-16 02:22:58,746 INFO L226 Difference]: Without dead ends: 17 [2021-10-16 02:22:58,749 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 02:22:58,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-16 02:22:58,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-10-16 02:22:58,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:58,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-10-16 02:22:58,779 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2021-10-16 02:22:58,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:22:58,779 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-10-16 02:22:58,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2021-10-16 02:22:58,780 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-10-16 02:22:58,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-16 02:22:58,780 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:22:58,780 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:22:58,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:22:58,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:22:58,992 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:22:58,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:22:58,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1988288018, now seen corresponding path program 1 times [2021-10-16 02:22:58,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:22:58,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [599918768] [2021-10-16 02:22:58,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:22:58,995 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:22:58,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:22:58,996 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:22:59,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 02:22:59,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:22:59,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:22:59,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:22:59,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:22:59,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:22:59,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:22:59,692 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:22:59,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [599918768] [2021-10-16 02:22:59,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [599918768] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:22:59,693 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:22:59,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 4] imperfect sequences [] total 8 [2021-10-16 02:22:59,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586062897] [2021-10-16 02:22:59,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:22:59,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:22:59,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:22:59,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:22:59,697 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2021-10-16 02:23:01,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:23:01,915 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2021-10-16 02:23:01,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-16 02:23:01,918 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-16 02:23:01,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:23:01,919 INFO L225 Difference]: With dead ends: 41 [2021-10-16 02:23:01,919 INFO L226 Difference]: Without dead ends: 39 [2021-10-16 02:23:01,920 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 488.9ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-10-16 02:23:01,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-16 02:23:01,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 22. [2021-10-16 02:23:01,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:23:01,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2021-10-16 02:23:01,927 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 10 [2021-10-16 02:23:01,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:23:01,928 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2021-10-16 02:23:01,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2021-10-16 02:23:01,928 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2021-10-16 02:23:01,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-16 02:23:01,929 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:23:01,929 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:23:01,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:23:02,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:23:02,141 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:23:02,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:23:02,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1507424085, now seen corresponding path program 1 times [2021-10-16 02:23:02,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:23:02,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1402543429] [2021-10-16 02:23:02,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:23:02,143 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:23:02,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:23:02,149 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:23:02,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 02:23:02,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:23:02,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:23:02,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:23:02,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:23:02,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:23:02,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:23:02,374 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:23:02,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1402543429] [2021-10-16 02:23:02,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1402543429] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:23:02,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:23:02,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-16 02:23:02,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556867083] [2021-10-16 02:23:02,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:23:02,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:23:02,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:23:02,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:23:02,377 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:23:02,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:23:02,489 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2021-10-16 02:23:02,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 02:23:02,490 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-16 02:23:02,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:23:02,492 INFO L225 Difference]: With dead ends: 39 [2021-10-16 02:23:02,492 INFO L226 Difference]: Without dead ends: 35 [2021-10-16 02:23:02,493 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 34.5ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:23:02,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-16 02:23:02,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2021-10-16 02:23:02,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 30 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:23:02,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2021-10-16 02:23:02,503 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 11 [2021-10-16 02:23:02,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:23:02,503 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2021-10-16 02:23:02,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:23:02,504 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2021-10-16 02:23:02,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-16 02:23:02,505 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:23:02,505 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:23:02,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-16 02:23:02,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:23:02,721 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:23:02,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:23:02,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1189458428, now seen corresponding path program 1 times [2021-10-16 02:23:02,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:23:02,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1669746822] [2021-10-16 02:23:02,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:23:02,723 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:23:02,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:23:02,725 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:23:02,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-16 02:23:02,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:23:02,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:23:02,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:23:03,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:23:03,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:23:03,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:23:03,678 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:23:03,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1669746822] [2021-10-16 02:23:03,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1669746822] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:23:03,678 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:23:03,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 5] imperfect sequences [] total 10 [2021-10-16 02:23:03,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795497429] [2021-10-16 02:23:03,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 02:23:03,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:23:03,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 02:23:03,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:23:03,681 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:23:04,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:23:04,986 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2021-10-16 02:23:04,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-16 02:23:04,988 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-16 02:23:04,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:23:04,990 INFO L225 Difference]: With dead ends: 39 [2021-10-16 02:23:04,990 INFO L226 Difference]: Without dead ends: 33 [2021-10-16 02:23:04,990 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1111.0ms TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2021-10-16 02:23:04,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-16 02:23:04,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-10-16 02:23:04,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:23:04,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2021-10-16 02:23:04,998 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 13 [2021-10-16 02:23:04,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:23:04,999 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2021-10-16 02:23:04,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:23:04,999 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2021-10-16 02:23:05,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-16 02:23:05,000 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:23:05,000 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:23:05,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-16 02:23:05,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:23:05,212 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:23:05,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:23:05,212 INFO L82 PathProgramCache]: Analyzing trace with hash -558465920, now seen corresponding path program 1 times [2021-10-16 02:23:05,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:23:05,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [543956776] [2021-10-16 02:23:05,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:23:05,213 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:23:05,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:23:05,214 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:23:05,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-16 02:23:05,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:23:05,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-16 02:23:05,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:23:05,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:23:05,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:23:06,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:23:06,887 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:23:06,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [543956776] [2021-10-16 02:23:06,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [543956776] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:23:06,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [163109534] [2021-10-16 02:23:06,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:23:06,888 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:23:06,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:23:06,894 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:23:06,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-10-16 02:23:07,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:23:07,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:23:07,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:23:07,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:23:07,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:23:07,657 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:23:07,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [163109534] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:23:07,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164078398] [2021-10-16 02:23:07,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:23:07,658 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:23:07,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:23:07,678 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:23:07,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-16 02:23:07,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:23:07,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-16 02:23:07,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:23:08,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:23:08,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:23:19,422 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:23:19,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164078398] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:23:19,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:23:19,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5, 5, 10, 6] total 20 [2021-10-16 02:23:19,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694890569] [2021-10-16 02:23:19,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-16 02:23:19,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:23:19,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-16 02:23:19,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=280, Unknown=3, NotChecked=0, Total=380 [2021-10-16 02:23:19,425 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:23:52,278 WARN L207 SmtUtils]: Spent 16.73 s on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2021-10-16 02:24:20,157 WARN L207 SmtUtils]: Spent 16.56 s on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2021-10-16 02:24:20,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:24:20,233 INFO L93 Difference]: Finished difference Result 83 states and 100 transitions. [2021-10-16 02:24:20,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-16 02:24:20,236 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-16 02:24:20,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:24:20,237 INFO L225 Difference]: With dead ends: 83 [2021-10-16 02:24:20,237 INFO L226 Difference]: Without dead ends: 72 [2021-10-16 02:24:20,238 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 64376.2ms TimeCoverageRelationStatistics Valid=375, Invalid=948, Unknown=9, NotChecked=0, Total=1332 [2021-10-16 02:24:20,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-16 02:24:20,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 47. [2021-10-16 02:24:20,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 46 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:24:20,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2021-10-16 02:24:20,247 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 15 [2021-10-16 02:24:20,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:24:20,248 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2021-10-16 02:24:20,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:24:20,248 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2021-10-16 02:24:20,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-16 02:24:20,249 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:24:20,250 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:24:20,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-16 02:24:20,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-10-16 02:24:20,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-10-16 02:24:20,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:24:20,867 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:24:20,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:24:20,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1449988658, now seen corresponding path program 1 times [2021-10-16 02:24:20,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:24:20,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1282745306] [2021-10-16 02:24:20,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:24:20,868 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:24:20,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:24:20,870 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:24:20,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-16 02:24:21,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:24:21,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-16 02:24:21,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:24:21,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:24:21,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:24:22,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 02:24:22,499 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:24:22,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1282745306] [2021-10-16 02:24:22,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1282745306] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:24:22,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-16 02:24:22,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2021-10-16 02:24:22,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137430595] [2021-10-16 02:24:22,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:24:22,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:24:22,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:24:22,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-10-16 02:24:22,502 INFO L87 Difference]: Start difference. First operand 47 states and 61 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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) [2021-10-16 02:24:23,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:24:23,173 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2021-10-16 02:24:23,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:24:23,173 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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 18 [2021-10-16 02:24:23,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:24:23,174 INFO L225 Difference]: With dead ends: 51 [2021-10-16 02:24:23,174 INFO L226 Difference]: Without dead ends: 47 [2021-10-16 02:24:23,175 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1162.2ms TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-10-16 02:24:23,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-16 02:24:23,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-10-16 02:24:23,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 46 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:24:23,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2021-10-16 02:24:23,187 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 18 [2021-10-16 02:24:23,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:24:23,187 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2021-10-16 02:24:23,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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) [2021-10-16 02:24:23,188 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2021-10-16 02:24:23,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-16 02:24:23,189 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:24:23,189 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:24:23,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-16 02:24:23,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:24:23,398 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:24:23,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:24:23,398 INFO L82 PathProgramCache]: Analyzing trace with hash -625728149, now seen corresponding path program 1 times [2021-10-16 02:24:23,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:24:23,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1194896674] [2021-10-16 02:24:23,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:24:23,399 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:24:23,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:24:23,400 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:24:23,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-16 02:24:23,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:24:23,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 02:24:23,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:24:23,672 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:24:23,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:24:23,810 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:24:23,810 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:24:23,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1194896674] [2021-10-16 02:24:23,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1194896674] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:24:23,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [370417738] [2021-10-16 02:24:23,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:24:23,811 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:24:23,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:24:23,814 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:24:23,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-10-16 02:24:24,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:24:24,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 02:24:24,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:24:24,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:24:24,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:24:24,306 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:24:24,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [370417738] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:24:24,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792451366] [2021-10-16 02:24:24,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:24:24,307 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:24:24,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:24:24,312 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:24:24,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-16 02:24:24,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:24:24,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 02:24:24,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:24:24,586 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:24:24,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:24:24,675 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:24:24,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792451366] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:24:24,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:24:24,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 9 [2021-10-16 02:24:24,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357080019] [2021-10-16 02:24:24,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 02:24:24,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:24:24,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 02:24:24,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:24:24,677 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:24:25,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:24:25,072 INFO L93 Difference]: Finished difference Result 101 states and 128 transitions. [2021-10-16 02:24:25,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-16 02:24:25,072 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-16 02:24:25,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:24:25,074 INFO L225 Difference]: With dead ends: 101 [2021-10-16 02:24:25,074 INFO L226 Difference]: Without dead ends: 97 [2021-10-16 02:24:25,074 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 219.6ms TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-10-16 02:24:25,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-10-16 02:24:25,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 93. [2021-10-16 02:24:25,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 91 states have (on average 1.2197802197802199) internal successors, (111), 92 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:24:25,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 111 transitions. [2021-10-16 02:24:25,096 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 111 transitions. Word has length 21 [2021-10-16 02:24:25,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:24:25,097 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 111 transitions. [2021-10-16 02:24:25,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:24:25,097 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 111 transitions. [2021-10-16 02:24:25,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-16 02:24:25,098 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:24:25,099 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:24:25,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-16 02:24:25,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-10-16 02:24:25,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-16 02:24:25,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:24:25,718 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:24:25,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:24:25,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1513887678, now seen corresponding path program 1 times [2021-10-16 02:24:25,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:24:25,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [297578025] [2021-10-16 02:24:25,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:24:25,719 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:24:25,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:24:25,720 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:24:25,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-16 02:24:25,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:24:25,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:24:25,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:24:26,070 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:24:26,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:24:26,170 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:24:26,170 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:24:26,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [297578025] [2021-10-16 02:24:26,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [297578025] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:24:26,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1611670375] [2021-10-16 02:24:26,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:24:26,170 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:24:26,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:24:26,174 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:24:26,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-10-16 02:24:26,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:24:26,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 02:24:26,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:24:26,557 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:24:26,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:24:26,655 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:24:26,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1611670375] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:24:26,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722688957] [2021-10-16 02:24:26,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:24:26,655 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:24:26,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:24:26,658 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:24:26,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-16 02:24:26,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:24:26,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:24:26,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:24:27,011 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:24:27,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:24:27,097 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:24:27,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722688957] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:24:27,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:24:27,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 5, 5, 5] total 8 [2021-10-16 02:24:27,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953394168] [2021-10-16 02:24:27,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:24:27,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:24:27,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:24:27,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:24:27,099 INFO L87 Difference]: Start difference. First operand 93 states and 111 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:24:27,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:24:27,235 INFO L93 Difference]: Finished difference Result 193 states and 232 transitions. [2021-10-16 02:24:27,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 02:24:27,238 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-16 02:24:27,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:24:27,239 INFO L225 Difference]: With dead ends: 193 [2021-10-16 02:24:27,239 INFO L226 Difference]: Without dead ends: 158 [2021-10-16 02:24:27,240 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 52.0ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:24:27,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-10-16 02:24:27,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 146. [2021-10-16 02:24:27,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 144 states have (on average 1.2152777777777777) internal successors, (175), 145 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:24:27,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 175 transitions. [2021-10-16 02:24:27,276 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 175 transitions. Word has length 25 [2021-10-16 02:24:27,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:24:27,276 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 175 transitions. [2021-10-16 02:24:27,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:24:27,277 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 175 transitions. [2021-10-16 02:24:27,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-16 02:24:27,282 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:24:27,282 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:24:27,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-16 02:24:27,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-10-16 02:24:27,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-16 02:24:27,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:24:27,897 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:24:27,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:24:27,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1106341888, now seen corresponding path program 2 times [2021-10-16 02:24:27,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:24:27,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [935170399] [2021-10-16 02:24:27,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:24:27,899 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:24:27,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:24:27,901 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:24:27,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-16 02:24:28,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:24:28,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:24:28,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-16 02:24:28,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:24:29,246 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:24:29,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:24:47,928 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-16 02:24:47,929 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:24:47,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [935170399] [2021-10-16 02:24:47,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [935170399] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:24:47,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1033687962] [2021-10-16 02:24:47,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:24:47,929 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:24:47,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:24:47,930 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:24:47,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-10-16 02:24:48,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:24:48,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:24:48,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-16 02:24:48,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:24:49,069 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:24:49,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:24:59,704 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-16 02:24:59,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1033687962] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:24:59,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295805180] [2021-10-16 02:24:59,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:24:59,705 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:24:59,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:24:59,713 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:24:59,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-16 02:25:00,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:25:00,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:25:00,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-16 02:25:00,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:00,822 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:25:00,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:25:13,492 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (bvmul c_ULTIMATE.start_main_~y1~0 c_ULTIMATE.start_main_~x2~0))) (or (= (bvadd c_ULTIMATE.start_main_~y3~0 c_ULTIMATE.start_main_~x2~0 .cse0) (bvadd c_ULTIMATE.start_main_~x1~0 (_ bv1 32))) (not (= (bvadd c_ULTIMATE.start_main_~y2~0 (_ bv1 32)) c_ULTIMATE.start_main_~x2~0)) (not (= c_ULTIMATE.start_main_~x1~0 (bvadd c_ULTIMATE.start_main_~y2~0 c_ULTIMATE.start_main_~y3~0 .cse0))))) is different from true [2021-10-16 02:25:19,523 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 1 not checked. [2021-10-16 02:25:19,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295805180] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:25:19,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:25:19,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7, 14, 7, 14, 8] total 20 [2021-10-16 02:25:19,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903961564] [2021-10-16 02:25:19,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-16 02:25:19,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:25:19,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-16 02:25:19,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=247, Unknown=1, NotChecked=34, Total=380 [2021-10-16 02:25:19,526 INFO L87 Difference]: Start difference. First operand 146 states and 175 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:28,449 WARN L207 SmtUtils]: Spent 6.11 s on a formula simplification. DAG size of input: 22 DAG size of output: 14 [2021-10-16 02:25:31,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:25:31,555 INFO L93 Difference]: Finished difference Result 157 states and 187 transitions. [2021-10-16 02:25:31,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-16 02:25:31,558 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-16 02:25:31,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:25:31,559 INFO L225 Difference]: With dead ends: 157 [2021-10-16 02:25:31,559 INFO L226 Difference]: Without dead ends: 139 [2021-10-16 02:25:31,560 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 124 SyntacticMatches, 8 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 19711.7ms TimeCoverageRelationStatistics Valid=214, Invalid=544, Unknown=2, NotChecked=52, Total=812 [2021-10-16 02:25:31,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-10-16 02:25:31,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 91. [2021-10-16 02:25:31,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1333333333333333) internal successors, (102), 90 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) [2021-10-16 02:25:31,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 102 transitions. [2021-10-16 02:25:31,577 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 102 transitions. Word has length 25 [2021-10-16 02:25:31,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:25:31,578 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 102 transitions. [2021-10-16 02:25:31,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:31,578 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 102 transitions. [2021-10-16 02:25:31,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-16 02:25:31,579 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:25:31,579 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:25:31,594 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-10-16 02:25:31,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-10-16 02:25:31,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-10-16 02:25:32,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:25:32,192 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:25:32,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:25:32,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1613459733, now seen corresponding path program 2 times [2021-10-16 02:25:32,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:25:32,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1605464019] [2021-10-16 02:25:32,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:25:32,193 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:25:32,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:25:32,194 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:25:32,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-16 02:25:32,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:25:32,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:25:32,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-16 02:25:32,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:32,865 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:25:32,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:25:33,251 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:25:33,251 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:25:33,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1605464019] [2021-10-16 02:25:33,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1605464019] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:25:33,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1699045571] [2021-10-16 02:25:33,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:25:33,252 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:25:33,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:25:33,253 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:25:33,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-10-16 02:25:33,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:25:33,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:25:33,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-16 02:25:33,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:34,075 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:25:34,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:25:34,217 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:25:34,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1699045571] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:25:34,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672941909] [2021-10-16 02:25:34,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:25:34,218 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:25:34,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:25:34,218 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:25:34,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-16 02:25:34,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:25:34,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:25:34,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-16 02:25:34,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:25:34,819 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:25:34,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:25:34,967 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:25:34,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672941909] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:25:34,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:25:34,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 17 [2021-10-16 02:25:34,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853224251] [2021-10-16 02:25:34,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-16 02:25:34,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:25:34,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-16 02:25:34,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-10-16 02:25:34,970 INFO L87 Difference]: Start difference. First operand 91 states and 102 transitions. Second operand has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:35,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:25:35,599 INFO L93 Difference]: Finished difference Result 155 states and 185 transitions. [2021-10-16 02:25:35,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-16 02:25:35,600 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-10-16 02:25:35,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:25:35,601 INFO L225 Difference]: With dead ends: 155 [2021-10-16 02:25:35,601 INFO L226 Difference]: Without dead ends: 151 [2021-10-16 02:25:35,602 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 461.4ms TimeCoverageRelationStatistics Valid=207, Invalid=605, Unknown=0, NotChecked=0, Total=812 [2021-10-16 02:25:35,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-10-16 02:25:35,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-10-16 02:25:35,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.1333333333333333) internal successors, (170), 150 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:35,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 170 transitions. [2021-10-16 02:25:35,621 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 170 transitions. Word has length 41 [2021-10-16 02:25:35,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:25:35,622 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 170 transitions. [2021-10-16 02:25:35,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:25:35,622 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 170 transitions. [2021-10-16 02:25:35,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-10-16 02:25:35,624 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:25:35,624 INFO L512 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:25:35,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-10-16 02:25:35,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-16 02:25:36,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-16 02:25:36,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:25:36,233 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:25:36,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:25:36,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1641990037, now seen corresponding path program 3 times [2021-10-16 02:25:36,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:25:36,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [928038087] [2021-10-16 02:25:36,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:25:36,234 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:25:36,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:25:36,235 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:25:36,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-16 02:25:36,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-10-16 02:25:36,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-16 02:25:36,922 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-16 02:25:37,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 02:25:37,416 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-16 02:25:37,416 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-16 02:25:37,417 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:25:37,419 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:25:37,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-16 02:25:37,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:25:37,643 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 02:25:37,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:25:37 BoogieIcfgContainer [2021-10-16 02:25:37,706 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 02:25:37,706 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 02:25:37,706 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 02:25:37,706 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 02:25:37,707 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:22:58" (3/4) ... [2021-10-16 02:25:37,708 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-16 02:25:37,786 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/witness.graphml [2021-10-16 02:25:37,789 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 02:25:37,791 INFO L168 Benchmark]: Toolchain (without parser) took 160227.85 ms. Allocated memory was 58.7 MB in the beginning and 73.4 MB in the end (delta: 14.7 MB). Free memory was 36.0 MB in the beginning and 23.3 MB in the end (delta: 12.8 MB). Peak memory consumption was 28.8 MB. Max. memory is 16.1 GB. [2021-10-16 02:25:37,791 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 58.7 MB. Free memory is still 39.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:25:37,791 INFO L168 Benchmark]: CACSL2BoogieTranslator took 289.79 ms. Allocated memory is still 58.7 MB. Free memory was 35.8 MB in the beginning and 25.7 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:25:37,793 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.92 ms. Allocated memory is still 58.7 MB. Free memory was 25.7 MB in the beginning and 24.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:25:37,793 INFO L168 Benchmark]: Boogie Preprocessor took 48.83 ms. Allocated memory is still 58.7 MB. Free memory was 24.1 MB in the beginning and 23.0 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:25:37,794 INFO L168 Benchmark]: RCFGBuilder took 446.43 ms. Allocated memory is still 58.7 MB. Free memory was 22.9 MB in the beginning and 32.6 MB in the end (delta: -9.7 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:25:37,795 INFO L168 Benchmark]: TraceAbstraction took 159309.60 ms. Allocated memory was 58.7 MB in the beginning and 73.4 MB in the end (delta: 14.7 MB). Free memory was 32.0 MB in the beginning and 28.7 MB in the end (delta: 3.3 MB). Peak memory consumption was 19.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:25:37,795 INFO L168 Benchmark]: Witness Printer took 83.48 ms. Allocated memory is still 73.4 MB. Free memory was 28.7 MB in the beginning and 23.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:25:37,797 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 58.7 MB. Free memory is still 39.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 289.79 ms. Allocated memory is still 58.7 MB. Free memory was 35.8 MB in the beginning and 25.7 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.92 ms. Allocated memory is still 58.7 MB. Free memory was 25.7 MB in the beginning and 24.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 48.83 ms. Allocated memory is still 58.7 MB. Free memory was 24.1 MB in the beginning and 23.0 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 446.43 ms. Allocated memory is still 58.7 MB. Free memory was 22.9 MB in the beginning and 32.6 MB in the end (delta: -9.7 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 159309.60 ms. Allocated memory was 58.7 MB in the beginning and 73.4 MB in the end (delta: 14.7 MB). Free memory was 32.0 MB in the beginning and 28.7 MB in the end (delta: 3.3 MB). Peak memory consumption was 19.2 MB. Max. memory is 16.1 GB. * Witness Printer took 83.48 ms. Allocated memory is still 73.4 MB. Free memory was 28.7 MB in the beginning and 23.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [counter=0] [L24] int x1, x2; [L25] int y1, y2, y3; [L26] x1 = __VERIFIER_nondet_int() [L27] x2 = __VERIFIER_nondet_int() [L13] COND FALSE !(!cond) VAL [counter=0] [L13] COND FALSE !(!cond) VAL [counter=0] [L32] y1 = 0 [L33] y2 = 0 [L34] y3 = x1 VAL [counter=0] [L36] EXPR counter++ VAL [counter=1] [L36] COND TRUE counter++<10 [L16] COND FALSE !(!(cond)) VAL [counter=1] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=1] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=1] [L36] EXPR counter++ VAL [counter=2] [L36] COND TRUE counter++<10 [L16] COND FALSE !(!(cond)) VAL [counter=2] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=2] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=2] [L36] EXPR counter++ VAL [counter=3] [L36] COND TRUE counter++<10 [L16] COND FALSE !(!(cond)) VAL [counter=3] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=3] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=3] [L36] EXPR counter++ VAL [counter=4] [L36] COND TRUE counter++<10 [L16] COND FALSE !(!(cond)) VAL [counter=4] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=4] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=4] [L36] EXPR counter++ VAL [counter=5] [L36] COND TRUE counter++<10 [L16] COND FALSE !(!(cond)) VAL [counter=5] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=5] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=5] [L36] EXPR counter++ VAL [counter=6] [L36] COND TRUE counter++<10 [L16] COND FALSE !(!(cond)) VAL [counter=6] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=6] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=6] [L36] EXPR counter++ VAL [counter=7] [L36] COND TRUE counter++<10 [L16] COND FALSE !(!(cond)) VAL [counter=7] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=7] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=7] [L36] EXPR counter++ VAL [counter=8] [L36] COND TRUE counter++<10 [L16] COND FALSE !(!(cond)) VAL [counter=8] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=8] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=8] [L36] EXPR counter++ VAL [counter=9] [L36] COND TRUE counter++<10 [L16] COND FALSE !(!(cond)) VAL [counter=9] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=9] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=9] [L36] EXPR counter++ VAL [counter=10] [L36] COND TRUE counter++<10 [L16] COND FALSE !(!(cond)) VAL [counter=10] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=10] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=10] [L36] EXPR counter++ VAL [counter=11] [L36] COND FALSE !(counter++<10) [L16] COND TRUE !(cond) VAL [counter=11] [L18] reach_error() VAL [counter=11] - UnprovableResult [Line: 18]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 21 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 159191.9ms, OverallIterations: 11, TraceHistogramMax: 11, EmptinessCheckTime: 23.2ms, AutomataDifference: 78385.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 173 SDtfs, 486 SDslu, 698 SDs, 0 SdLazy, 675 SolverSat, 217 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 13776.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 916 GetRequests, 750 SyntacticMatches, 8 SemanticMatches, 158 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 87617.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=151occurred in iteration=10, InterpolantAutomatonStates: 120, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 156.6ms AutomataMinimizationTime, 10 MinimizatonAttempts, 110 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 157.0ms SsaConstructionTime, 1842.6ms SatisfiabilityAnalysisTime, 69857.5ms InterpolantComputationTime, 504 NumberOfCodeBlocks, 504 NumberOfCodeBlocksAsserted, 37 NumberOfCheckSat, 846 ConstructedInterpolants, 7 QuantifiedInterpolants, 4408 SizeOfPredicates, 120 NumberOfNonLiveVariables, 1303 ConjunctsInSsa, 241 ConjunctsInUnsatCore, 40 InterpolantComputations, 9 PerfectInterpolantSequences, 157/890 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-16 02:25:37,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_366f34f9-fe8b-469f-9b3d-33a2017d63b9/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...