./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl-simplified/s3_srvr_11.cil.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_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/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_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl-simplified/s3_srvr_11.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/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_f3067c5a-511d-48db-b3c5-f98111b51715/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 18ee809429f0b3c8e92a71c11a5fa43a76d43db8 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/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_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl-simplified/s3_srvr_11.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/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_f3067c5a-511d-48db-b3c5-f98111b51715/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 18ee809429f0b3c8e92a71c11a5fa43a76d43db8 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 02:09:22,916 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:09:22,919 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:09:22,968 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:09:22,969 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:09:22,973 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:09:22,975 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:09:22,979 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:09:22,983 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:09:22,989 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:09:22,990 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:09:22,993 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:09:22,993 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:09:22,997 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:09:23,001 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:09:23,008 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:09:23,010 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:09:23,011 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:09:23,019 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:09:23,027 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:09:23,030 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:09:23,031 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:09:23,035 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:09:23,037 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:09:23,049 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:09:23,049 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:09:23,050 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:09:23,052 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:09:23,053 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:09:23,054 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:09:23,056 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:09:23,057 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:09:23,059 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:09:23,060 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:09:23,062 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:09:23,062 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:09:23,063 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:09:23,063 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:09:23,064 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:09:23,065 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:09:23,066 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:09:23,067 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 02:09:23,098 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:09:23,099 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:09:23,099 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:09:23,100 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:09:23,100 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:09:23,100 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:09:23,101 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:09:23,101 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:09:23,101 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:09:23,101 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:09:23,102 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:09:23,102 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:09:23,102 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:09:23,102 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:09:23,103 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:09:23,103 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:09:23,104 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:09:23,104 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:09:23,104 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:09:23,104 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:09:23,105 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:09:23,105 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:09:23,105 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:09:23,105 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:09:23,106 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:09:23,106 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:09:23,106 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:09:23,106 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:09:23,107 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:09:23,107 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:09:23,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:09:23,107 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:09:23,108 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:09:23,108 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:09:23,108 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:09:23,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:09:23,109 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:09:23,109 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:09:23,109 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:09:23,109 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_f3067c5a-511d-48db-b3c5-f98111b51715/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 18ee809429f0b3c8e92a71c11a5fa43a76d43db8 [2021-10-16 02:09:23,387 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:09:23,414 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:09:23,417 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:09:23,419 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:09:23,419 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:09:23,420 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/openssl-simplified/s3_srvr_11.cil.c [2021-10-16 02:09:23,528 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/data/813be6970/3acb440966c64b2e9a2dc7e5eea97803/FLAG02af22aac [2021-10-16 02:09:24,042 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:09:24,043 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/sv-benchmarks/c/openssl-simplified/s3_srvr_11.cil.c [2021-10-16 02:09:24,054 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/data/813be6970/3acb440966c64b2e9a2dc7e5eea97803/FLAG02af22aac [2021-10-16 02:09:24,366 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/data/813be6970/3acb440966c64b2e9a2dc7e5eea97803 [2021-10-16 02:09:24,369 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:09:24,370 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:09:24,373 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:09:24,373 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:09:24,377 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:09:24,378 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:09:24" (1/1) ... [2021-10-16 02:09:24,379 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6400d58b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:09:24, skipping insertion in model container [2021-10-16 02:09:24,380 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:09:24" (1/1) ... [2021-10-16 02:09:24,387 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:09:24,428 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:09:24,749 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_f3067c5a-511d-48db-b3c5-f98111b51715/sv-benchmarks/c/openssl-simplified/s3_srvr_11.cil.c[43646,43659] [2021-10-16 02:09:24,761 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:09:24,775 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:09:24,878 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_f3067c5a-511d-48db-b3c5-f98111b51715/sv-benchmarks/c/openssl-simplified/s3_srvr_11.cil.c[43646,43659] [2021-10-16 02:09:24,881 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:09:24,903 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:09:24,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:09:24 WrapperNode [2021-10-16 02:09:24,904 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:09:24,905 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:09:24,905 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:09:24,905 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:09:24,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:09:24" (1/1) ... [2021-10-16 02:09:24,937 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:09:24" (1/1) ... [2021-10-16 02:09:24,984 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:09:24,985 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:09:24,985 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:09:24,985 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:09:24,999 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:09:24" (1/1) ... [2021-10-16 02:09:24,999 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:09:24" (1/1) ... [2021-10-16 02:09:25,004 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:09:24" (1/1) ... [2021-10-16 02:09:25,004 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:09:24" (1/1) ... [2021-10-16 02:09:25,016 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:09:24" (1/1) ... [2021-10-16 02:09:25,025 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:09:24" (1/1) ... [2021-10-16 02:09:25,028 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:09:24" (1/1) ... [2021-10-16 02:09:25,033 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:09:25,034 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:09:25,034 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:09:25,035 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:09:25,035 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:09:24" (1/1) ... [2021-10-16 02:09:25,043 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:09:25,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:09:25,066 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:09:25,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:09:25,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 02:09:25,110 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:09:25,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:09:25,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:09:25,223 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-10-16 02:09:25,776 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-10-16 02:09:25,777 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-10-16 02:09:26,084 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:09:26,084 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-16 02:09:26,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:09:26 BoogieIcfgContainer [2021-10-16 02:09:26,087 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:09:26,089 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:09:26,089 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:09:26,092 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:09:26,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:09:24" (1/3) ... [2021-10-16 02:09:26,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3468caa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:09:26, skipping insertion in model container [2021-10-16 02:09:26,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:09:24" (2/3) ... [2021-10-16 02:09:26,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3468caa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:09:26, skipping insertion in model container [2021-10-16 02:09:26,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:09:26" (3/3) ... [2021-10-16 02:09:26,095 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr_11.cil.c [2021-10-16 02:09:26,101 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:09:26,101 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:09:26,167 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:09:26,174 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 02:09:26,175 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 02:09:26,192 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 112 states have (on average 1.7857142857142858) internal successors, (200), 113 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:09:26,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-16 02:09:26,198 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:09:26,199 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:09:26,199 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:09:26,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:09:26,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1924020503, now seen corresponding path program 1 times [2021-10-16 02:09:26,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:09:26,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473187858] [2021-10-16 02:09:26,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:09:26,217 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:09:26,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:09:26,412 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 02:09:26,413 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:09:26,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473187858] [2021-10-16 02:09:26,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473187858] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:09:26,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:09:26,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:09:26,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424704802] [2021-10-16 02:09:26,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:09:26,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:09:26,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:09:26,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:09:26,437 INFO L87 Difference]: Start difference. First operand has 114 states, 112 states have (on average 1.7857142857142858) internal successors, (200), 113 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 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 02:09:26,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:09:26,671 INFO L93 Difference]: Finished difference Result 249 states and 436 transitions. [2021-10-16 02:09:26,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:09:26,673 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-16 02:09:26,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:09:26,688 INFO L225 Difference]: With dead ends: 249 [2021-10-16 02:09:26,688 INFO L226 Difference]: Without dead ends: 131 [2021-10-16 02:09:26,692 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:09:26,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-10-16 02:09:26,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2021-10-16 02:09:26,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.5078125) internal successors, (193), 128 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:09:26,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 193 transitions. [2021-10-16 02:09:26,762 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 193 transitions. Word has length 19 [2021-10-16 02:09:26,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:09:26,763 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 193 transitions. [2021-10-16 02:09:26,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 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 02:09:26,763 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 193 transitions. [2021-10-16 02:09:26,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-16 02:09:26,764 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:09:26,765 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:09:26,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 02:09:26,765 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:09:26,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:09:26,769 INFO L82 PathProgramCache]: Analyzing trace with hash 313171778, now seen corresponding path program 1 times [2021-10-16 02:09:26,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:09:26,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623029363] [2021-10-16 02:09:26,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:09:26,770 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:09:26,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:09:26,879 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 02:09:26,880 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:09:26,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623029363] [2021-10-16 02:09:26,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623029363] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:09:26,880 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:09:26,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:09:26,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56555042] [2021-10-16 02:09:26,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:09:26,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:09:26,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:09:26,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:09:26,883 INFO L87 Difference]: Start difference. First operand 129 states and 193 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 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 02:09:27,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:09:27,036 INFO L93 Difference]: Finished difference Result 268 states and 400 transitions. [2021-10-16 02:09:27,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:09:27,037 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 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 24 [2021-10-16 02:09:27,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:09:27,042 INFO L225 Difference]: With dead ends: 268 [2021-10-16 02:09:27,042 INFO L226 Difference]: Without dead ends: 141 [2021-10-16 02:09:27,044 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:09:27,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-10-16 02:09:27,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 137. [2021-10-16 02:09:27,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.5) internal successors, (204), 136 states have internal predecessors, (204), 0 states have call successors, (0), 0 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 02:09:27,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 204 transitions. [2021-10-16 02:09:27,066 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 204 transitions. Word has length 24 [2021-10-16 02:09:27,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:09:27,066 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 204 transitions. [2021-10-16 02:09:27,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 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 02:09:27,067 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 204 transitions. [2021-10-16 02:09:27,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-16 02:09:27,068 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:09:27,069 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:09:27,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-16 02:09:27,069 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:09:27,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:09:27,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1945736093, now seen corresponding path program 1 times [2021-10-16 02:09:27,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:09:27,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598726383] [2021-10-16 02:09:27,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:09:27,073 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:09:27,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:09:27,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:09:27,178 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:09:27,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598726383] [2021-10-16 02:09:27,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598726383] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:09:27,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:09:27,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:09:27,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445834758] [2021-10-16 02:09:27,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:09:27,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:09:27,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:09:27,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:09:27,181 INFO L87 Difference]: Start difference. First operand 137 states and 204 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:09:27,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:09:27,348 INFO L93 Difference]: Finished difference Result 325 states and 499 transitions. [2021-10-16 02:09:27,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:09:27,356 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-16 02:09:27,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:09:27,357 INFO L225 Difference]: With dead ends: 325 [2021-10-16 02:09:27,357 INFO L226 Difference]: Without dead ends: 178 [2021-10-16 02:09:27,358 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:09:27,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-10-16 02:09:27,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 175. [2021-10-16 02:09:27,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.471264367816092) internal successors, (256), 174 states have internal predecessors, (256), 0 states have call successors, (0), 0 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 02:09:27,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 256 transitions. [2021-10-16 02:09:27,368 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 256 transitions. Word has length 34 [2021-10-16 02:09:27,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:09:27,369 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 256 transitions. [2021-10-16 02:09:27,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 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 02:09:27,369 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 256 transitions. [2021-10-16 02:09:27,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-10-16 02:09:27,371 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:09:27,371 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:09:27,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-16 02:09:27,372 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:09:27,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:09:27,373 INFO L82 PathProgramCache]: Analyzing trace with hash -732443533, now seen corresponding path program 1 times [2021-10-16 02:09:27,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:09:27,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118084553] [2021-10-16 02:09:27,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:09:27,374 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:09:27,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:09:27,430 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:09:27,430 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:09:27,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118084553] [2021-10-16 02:09:27,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118084553] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 02:09:27,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592580848] [2021-10-16 02:09:27,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:09:27,432 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:09:27,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:09:27,446 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:09:27,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 02:09:27,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:09:27,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:09:27,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:09:27,801 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:09:27,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:09:27,915 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:09:27,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592580848] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:09:27,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [482898281] [2021-10-16 02:09:27,937 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2021-10-16 02:09:27,937 INFO L166 IcfgInterpreter]: Building call graph [2021-10-16 02:09:27,942 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-16 02:09:27,947 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-16 02:09:27,948 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-16 02:09:28,065 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:09:28,070 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:09:28,072 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:09:28,073 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-16 02:09:28,076 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:09:28,077 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:09:28,078 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-16 02:09:28,098 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 402 [2021-10-16 02:09:28,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:09:28,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:09:28,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:09:28,239 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-10-16 02:09:28,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 43 treesize of output 42 [2021-10-16 02:09:28,241 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:09:28,244 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-16 02:09:28,245 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:09:28,251 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-16 02:09:28,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-16 02:09:28,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:09:28,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:09:28,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:09:28,341 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-10-16 02:09:28,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 43 treesize of output 42 [2021-10-16 02:09:28,345 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:09:28,349 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-16 02:09:28,350 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:09:28,351 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-16 02:09:28,351 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-16 02:09:28,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:09:28,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:09:28,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:09:28,428 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-10-16 02:09:28,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 43 treesize of output 42 [2021-10-16 02:09:28,430 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:09:28,432 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-16 02:09:28,434 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:09:28,435 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-16 02:09:28,435 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-10-16 02:09:28,438 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:09:28,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:09:28,732 INFO L180 QuantifierPusher]: treesize reduction 18, result has 98.3 percent of original size [2021-10-16 02:09:28,779 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1071 [2021-10-16 02:09:28,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-10-16 02:09:28,781 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:1137, output treesize:1071 [2021-10-16 02:09:28,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:09:29,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:09:29,005 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#length_21| 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 02:09:29,009 INFO L168 Benchmark]: Toolchain (without parser) took 4638.28 ms. Allocated memory was 96.5 MB in the beginning and 155.2 MB in the end (delta: 58.7 MB). Free memory was 60.8 MB in the beginning and 73.8 MB in the end (delta: -13.0 MB). Peak memory consumption was 51.9 MB. Max. memory is 16.1 GB. [2021-10-16 02:09:29,010 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 96.5 MB. Free memory was 66.2 MB in the beginning and 66.2 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:09:29,011 INFO L168 Benchmark]: CACSL2BoogieTranslator took 531.33 ms. Allocated memory was 96.5 MB in the beginning and 127.9 MB in the end (delta: 31.5 MB). Free memory was 60.8 MB in the beginning and 98.3 MB in the end (delta: -37.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:09:29,011 INFO L168 Benchmark]: Boogie Procedure Inliner took 79.10 ms. Allocated memory is still 127.9 MB. Free memory was 98.3 MB in the beginning and 95.5 MB in the end (delta: 2.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:09:29,012 INFO L168 Benchmark]: Boogie Preprocessor took 48.65 ms. Allocated memory is still 127.9 MB. Free memory was 95.5 MB in the beginning and 93.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:09:29,012 INFO L168 Benchmark]: RCFGBuilder took 1052.96 ms. Allocated memory is still 127.9 MB. Free memory was 93.4 MB in the beginning and 95.5 MB in the end (delta: -2.1 MB). Peak memory consumption was 53.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:09:29,013 INFO L168 Benchmark]: TraceAbstraction took 2919.43 ms. Allocated memory was 127.9 MB in the beginning and 155.2 MB in the end (delta: 27.3 MB). Free memory was 94.7 MB in the beginning and 73.8 MB in the end (delta: 21.0 MB). Peak memory consumption was 53.9 MB. Max. memory is 16.1 GB. [2021-10-16 02:09:29,016 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 96.5 MB. Free memory was 66.2 MB in the beginning and 66.2 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 531.33 ms. Allocated memory was 96.5 MB in the beginning and 127.9 MB in the end (delta: 31.5 MB). Free memory was 60.8 MB in the beginning and 98.3 MB in the end (delta: -37.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 79.10 ms. Allocated memory is still 127.9 MB. Free memory was 98.3 MB in the beginning and 95.5 MB in the end (delta: 2.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 48.65 ms. Allocated memory is still 127.9 MB. Free memory was 95.5 MB in the beginning and 93.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1052.96 ms. Allocated memory is still 127.9 MB. Free memory was 93.4 MB in the beginning and 95.5 MB in the end (delta: -2.1 MB). Peak memory consumption was 53.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2919.43 ms. Allocated memory was 127.9 MB in the beginning and 155.2 MB in the end (delta: 27.3 MB). Free memory was 94.7 MB in the beginning and 73.8 MB in the end (delta: 21.0 MB). Peak memory consumption was 53.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#length_21| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#length_21|: 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 02:09:29,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/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 02:09:31,494 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:09:31,498 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:09:31,547 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:09:31,548 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:09:31,553 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:09:31,554 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:09:31,559 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:09:31,562 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:09:31,570 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:09:31,571 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:09:31,573 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:09:31,574 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:09:31,576 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:09:31,578 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:09:31,582 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:09:31,584 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:09:31,585 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:09:31,587 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:09:31,598 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:09:31,600 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:09:31,601 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:09:31,605 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:09:31,607 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:09:31,616 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:09:31,617 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:09:31,617 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:09:31,619 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:09:31,620 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:09:31,621 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:09:31,621 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:09:31,622 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:09:31,625 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:09:31,625 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:09:31,627 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:09:31,627 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:09:31,628 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:09:31,628 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:09:31,629 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:09:31,631 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:09:31,632 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:09:31,632 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-16 02:09:31,676 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:09:31,676 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:09:31,678 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:09:31,678 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:09:31,678 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:09:31,679 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:09:31,679 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:09:31,679 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:09:31,679 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:09:31,681 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:09:31,682 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:09:31,682 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:09:31,682 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:09:31,683 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:09:31,683 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:09:31,683 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:09:31,683 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:09:31,683 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 02:09:31,684 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 02:09:31,684 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:09:31,684 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:09:31,684 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:09:31,684 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:09:31,685 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:09:31,685 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 02:09:31,685 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:09:31,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:09:31,685 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:09:31,686 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:09:31,686 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:09:31,686 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 02:09:31,686 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 02:09:31,686 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:09:31,687 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:09:31,687 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:09:31,687 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_f3067c5a-511d-48db-b3c5-f98111b51715/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 18ee809429f0b3c8e92a71c11a5fa43a76d43db8 [2021-10-16 02:09:32,068 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:09:32,096 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:09:32,099 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:09:32,100 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:09:32,101 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:09:32,102 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/openssl-simplified/s3_srvr_11.cil.c [2021-10-16 02:09:32,179 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/data/fe190607f/a04bfc315b204cee833a596a89f3f9da/FLAG7ab660875 [2021-10-16 02:09:32,852 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:09:32,852 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/sv-benchmarks/c/openssl-simplified/s3_srvr_11.cil.c [2021-10-16 02:09:32,873 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/data/fe190607f/a04bfc315b204cee833a596a89f3f9da/FLAG7ab660875 [2021-10-16 02:09:32,893 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/data/fe190607f/a04bfc315b204cee833a596a89f3f9da [2021-10-16 02:09:32,902 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:09:32,905 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:09:32,909 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:09:32,910 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:09:32,913 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:09:32,914 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:09:32" (1/1) ... [2021-10-16 02:09:32,916 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dd0170d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:09:32, skipping insertion in model container [2021-10-16 02:09:32,916 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:09:32" (1/1) ... [2021-10-16 02:09:32,924 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:09:32,991 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:09:33,213 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_f3067c5a-511d-48db-b3c5-f98111b51715/sv-benchmarks/c/openssl-simplified/s3_srvr_11.cil.c[43646,43659] [2021-10-16 02:09:33,221 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:09:33,236 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:09:33,299 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_f3067c5a-511d-48db-b3c5-f98111b51715/sv-benchmarks/c/openssl-simplified/s3_srvr_11.cil.c[43646,43659] [2021-10-16 02:09:33,303 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:09:33,317 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:09:33,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:09:33 WrapperNode [2021-10-16 02:09:33,318 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:09:33,319 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:09:33,320 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:09:33,320 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:09:33,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:09:33" (1/1) ... [2021-10-16 02:09:33,345 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:09:33" (1/1) ... [2021-10-16 02:09:33,393 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:09:33,394 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:09:33,394 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:09:33,395 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:09:33,404 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:09:33" (1/1) ... [2021-10-16 02:09:33,405 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:09:33" (1/1) ... [2021-10-16 02:09:33,410 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:09:33" (1/1) ... [2021-10-16 02:09:33,411 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:09:33" (1/1) ... [2021-10-16 02:09:33,423 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:09:33" (1/1) ... [2021-10-16 02:09:33,432 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:09:33" (1/1) ... [2021-10-16 02:09:33,436 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:09:33" (1/1) ... [2021-10-16 02:09:33,464 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:09:33,465 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:09:33,465 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:09:33,465 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:09:33,466 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:09:33" (1/1) ... [2021-10-16 02:09:33,473 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:09:33,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:09:33,516 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:09:33,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:09:33,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 02:09:33,555 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:09:33,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:09:33,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:09:33,691 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-10-16 02:09:34,384 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-10-16 02:09:34,384 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-10-16 02:09:34,393 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:09:34,394 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-16 02:09:34,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:09:34 BoogieIcfgContainer [2021-10-16 02:09:34,396 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:09:34,398 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:09:34,399 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:09:34,402 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:09:34,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:09:32" (1/3) ... [2021-10-16 02:09:34,403 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e22c277 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:09:34, skipping insertion in model container [2021-10-16 02:09:34,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:09:33" (2/3) ... [2021-10-16 02:09:34,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e22c277 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:09:34, skipping insertion in model container [2021-10-16 02:09:34,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:09:34" (3/3) ... [2021-10-16 02:09:34,405 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr_11.cil.c [2021-10-16 02:09:34,412 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:09:34,412 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:09:34,460 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:09:34,467 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 02:09:34,467 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 02:09:34,487 INFO L276 IsEmpty]: Start isEmpty. Operand has 149 states, 147 states have (on average 1.7414965986394557) internal successors, (256), 148 states have internal predecessors, (256), 0 states have call successors, (0), 0 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 02:09:34,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-16 02:09:34,495 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:09:34,495 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:09:34,496 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:09:34,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:09:34,502 INFO L82 PathProgramCache]: Analyzing trace with hash -814657320, now seen corresponding path program 1 times [2021-10-16 02:09:34,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:09:34,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [883550125] [2021-10-16 02:09:34,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:09:34,515 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:09:34,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:09:34,520 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:09:34,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 02:09:34,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:09:34,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:09:34,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:09:34,876 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 02:09:34,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:09:35,039 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 02:09:35,040 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:09:35,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [883550125] [2021-10-16 02:09:35,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [883550125] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:09:35,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:09:35,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-16 02:09:35,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917471842] [2021-10-16 02:09:35,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:09:35,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:09:35,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:09:35,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:09:35,067 INFO L87 Difference]: Start difference. First operand has 149 states, 147 states have (on average 1.7414965986394557) internal successors, (256), 148 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 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 02:09:35,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:09:35,425 INFO L93 Difference]: Finished difference Result 346 states and 593 transitions. [2021-10-16 02:09:35,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:09:35,436 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 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 26 [2021-10-16 02:09:35,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:09:35,456 INFO L225 Difference]: With dead ends: 346 [2021-10-16 02:09:35,456 INFO L226 Difference]: Without dead ends: 178 [2021-10-16 02:09:35,459 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:09:35,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-10-16 02:09:35,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 173. [2021-10-16 02:09:35,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.552325581395349) internal successors, (267), 172 states have internal predecessors, (267), 0 states have call successors, (0), 0 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 02:09:35,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 267 transitions. [2021-10-16 02:09:35,505 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 267 transitions. Word has length 26 [2021-10-16 02:09:35,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:09:35,505 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 267 transitions. [2021-10-16 02:09:35,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 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 02:09:35,506 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 267 transitions. [2021-10-16 02:09:35,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-16 02:09:35,507 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:09:35,508 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:09:35,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:09:35,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:09:35,711 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:09:35,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:09:35,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1189847454, now seen corresponding path program 1 times [2021-10-16 02:09:35,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:09:35,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [739341895] [2021-10-16 02:09:35,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:09:35,714 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:09:35,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:09:35,715 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:09:35,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 02:09:35,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:09:35,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:09:35,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:09:35,953 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 02:09:35,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:09:36,114 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 02:09:36,115 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:09:36,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [739341895] [2021-10-16 02:09:36,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [739341895] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:09:36,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:09:36,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-16 02:09:36,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161461914] [2021-10-16 02:09:36,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:09:36,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:09:36,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:09:36,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:09:36,123 INFO L87 Difference]: Start difference. First operand 173 states and 267 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:09:36,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:09:36,651 INFO L93 Difference]: Finished difference Result 540 states and 834 transitions. [2021-10-16 02:09:36,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-16 02:09:36,652 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-10-16 02:09:36,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:09:36,656 INFO L225 Difference]: With dead ends: 540 [2021-10-16 02:09:36,656 INFO L226 Difference]: Without dead ends: 375 [2021-10-16 02:09:36,658 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 50.8ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:09:36,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-10-16 02:09:36,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 330. [2021-10-16 02:09:36,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 1.56838905775076) internal successors, (516), 329 states have internal predecessors, (516), 0 states have call successors, (0), 0 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 02:09:36,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 516 transitions. [2021-10-16 02:09:36,749 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 516 transitions. Word has length 30 [2021-10-16 02:09:36,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:09:36,750 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 516 transitions. [2021-10-16 02:09:36,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:09:36,751 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 516 transitions. [2021-10-16 02:09:36,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-10-16 02:09:36,756 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:09:36,757 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:09:36,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:09:36,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:09:36,957 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:09:36,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:09:36,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1697471872, now seen corresponding path program 1 times [2021-10-16 02:09:36,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:09:36,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2019692904] [2021-10-16 02:09:36,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:09:36,960 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:09:36,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:09:36,962 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:09:36,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 02:09:37,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:09:37,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:09:37,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:09:37,229 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:09:37,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:09:37,386 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:09:37,387 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:09:37,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2019692904] [2021-10-16 02:09:37,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2019692904] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:09:37,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:09:37,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-16 02:09:37,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709873186] [2021-10-16 02:09:37,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:09:37,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:09:37,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:09:37,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:09:37,391 INFO L87 Difference]: Start difference. First operand 330 states and 516 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 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 02:09:37,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:09:37,563 INFO L93 Difference]: Finished difference Result 705 states and 1102 transitions. [2021-10-16 02:09:37,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:09:37,563 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-10-16 02:09:37,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:09:37,567 INFO L225 Difference]: With dead ends: 705 [2021-10-16 02:09:37,567 INFO L226 Difference]: Without dead ends: 370 [2021-10-16 02:09:37,568 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:09:37,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-10-16 02:09:37,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 360. [2021-10-16 02:09:37,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 1.5487465181058495) internal successors, (556), 359 states have internal predecessors, (556), 0 states have call successors, (0), 0 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 02:09:37,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 556 transitions. [2021-10-16 02:09:37,593 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 556 transitions. Word has length 61 [2021-10-16 02:09:37,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:09:37,594 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 556 transitions. [2021-10-16 02:09:37,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 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 02:09:37,595 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 556 transitions. [2021-10-16 02:09:37,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-10-16 02:09:37,597 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:09:37,598 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:09:37,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-16 02:09:37,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:09:37,813 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:09:37,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:09:37,813 INFO L82 PathProgramCache]: Analyzing trace with hash -757735596, now seen corresponding path program 1 times [2021-10-16 02:09:37,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:09:37,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1847652138] [2021-10-16 02:09:37,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:09:37,815 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:09:37,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:09:37,816 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:09:37,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-16 02:09:37,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:09:37,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:09:37,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:09:38,211 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-16 02:09:38,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:09:38,461 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-16 02:09:38,461 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:09:38,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1847652138] [2021-10-16 02:09:38,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1847652138] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:09:38,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:09:38,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-16 02:09:38,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721906348] [2021-10-16 02:09:38,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:09:38,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:09:38,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:09:38,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:09:38,465 INFO L87 Difference]: Start difference. First operand 360 states and 556 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:09:38,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:09:38,647 INFO L93 Difference]: Finished difference Result 773 states and 1204 transitions. [2021-10-16 02:09:38,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:09:38,648 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-10-16 02:09:38,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:09:38,652 INFO L225 Difference]: With dead ends: 773 [2021-10-16 02:09:38,652 INFO L226 Difference]: Without dead ends: 421 [2021-10-16 02:09:38,653 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:09:38,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-10-16 02:09:38,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 413. [2021-10-16 02:09:38,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 1.5048543689320388) internal successors, (620), 412 states have internal predecessors, (620), 0 states have call successors, (0), 0 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 02:09:38,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 620 transitions. [2021-10-16 02:09:38,674 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 620 transitions. Word has length 83 [2021-10-16 02:09:38,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:09:38,675 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 620 transitions. [2021-10-16 02:09:38,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:09:38,676 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 620 transitions. [2021-10-16 02:09:38,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-10-16 02:09:38,678 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:09:38,679 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:09:38,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-16 02:09:38,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:09:38,893 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:09:38,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:09:38,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1655128874, now seen corresponding path program 1 times [2021-10-16 02:09:38,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:09:38,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1086405009] [2021-10-16 02:09:38,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:09:38,895 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:09:38,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:09:38,895 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:09:38,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-16 02:09:39,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:09:39,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:09:39,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:09:39,259 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-16 02:09:39,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:09:39,428 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-16 02:09:39,428 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:09:39,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1086405009] [2021-10-16 02:09:39,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1086405009] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:09:39,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:09:39,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-16 02:09:39,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789553059] [2021-10-16 02:09:39,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:09:39,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:09:39,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:09:39,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:09:39,436 INFO L87 Difference]: Start difference. First operand 413 states and 620 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:09:39,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:09:39,615 INFO L93 Difference]: Finished difference Result 858 states and 1295 transitions. [2021-10-16 02:09:39,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:09:39,616 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-10-16 02:09:39,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:09:39,621 INFO L225 Difference]: With dead ends: 858 [2021-10-16 02:09:39,622 INFO L226 Difference]: Without dead ends: 453 [2021-10-16 02:09:39,623 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:09:39,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-10-16 02:09:39,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 445. [2021-10-16 02:09:39,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 1.4932432432432432) internal successors, (663), 444 states have internal predecessors, (663), 0 states have call successors, (0), 0 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 02:09:39,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 663 transitions. [2021-10-16 02:09:39,648 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 663 transitions. Word has length 83 [2021-10-16 02:09:39,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:09:39,648 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 663 transitions. [2021-10-16 02:09:39,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:09:39,649 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 663 transitions. [2021-10-16 02:09:39,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-10-16 02:09:39,651 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:09:39,652 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:09:39,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-16 02:09:39,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:09:39,863 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:09:39,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:09:39,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1006764190, now seen corresponding path program 1 times [2021-10-16 02:09:39,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:09:39,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [945262389] [2021-10-16 02:09:39,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:09:39,864 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:09:39,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:09:39,865 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:09:39,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-16 02:09:40,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:09:40,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:09:40,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:09:40,380 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-16 02:09:40,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:09:40,611 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-16 02:09:40,611 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:09:40,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [945262389] [2021-10-16 02:09:40,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [945262389] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:09:40,612 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:09:40,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-16 02:09:40,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106467031] [2021-10-16 02:09:40,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:09:40,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:09:40,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:09:40,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:09:40,614 INFO L87 Difference]: Start difference. First operand 445 states and 663 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 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 02:09:40,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:09:40,791 INFO L93 Difference]: Finished difference Result 942 states and 1417 transitions. [2021-10-16 02:09:40,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:09:40,792 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 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 105 [2021-10-16 02:09:40,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:09:40,795 INFO L225 Difference]: With dead ends: 942 [2021-10-16 02:09:40,796 INFO L226 Difference]: Without dead ends: 505 [2021-10-16 02:09:40,797 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:09:40,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-10-16 02:09:40,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 479. [2021-10-16 02:09:40,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 1.4811715481171548) internal successors, (708), 478 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:09:40,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 708 transitions. [2021-10-16 02:09:40,819 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 708 transitions. Word has length 105 [2021-10-16 02:09:40,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:09:40,820 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 708 transitions. [2021-10-16 02:09:40,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 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 02:09:40,820 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 708 transitions. [2021-10-16 02:09:40,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-10-16 02:09:40,822 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:09:40,822 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:09:40,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-16 02:09:41,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:09:41,034 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:09:41,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:09:41,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1371731480, now seen corresponding path program 1 times [2021-10-16 02:09:41,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:09:41,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [331049156] [2021-10-16 02:09:41,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:09:41,036 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:09:41,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:09:41,037 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:09:41,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-16 02:09:41,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:09:41,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:09:41,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:09:41,598 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-16 02:09:41,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:09:41,866 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-16 02:09:41,866 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:09:41,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [331049156] [2021-10-16 02:09:41,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [331049156] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:09:41,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:09:41,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-16 02:09:41,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293483906] [2021-10-16 02:09:41,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:09:41,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:09:41,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:09:41,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:09:41,869 INFO L87 Difference]: Start difference. First operand 479 states and 708 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 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 02:09:41,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:09:41,951 INFO L93 Difference]: Finished difference Result 1846 states and 2735 transitions. [2021-10-16 02:09:41,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:09:41,952 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 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 124 [2021-10-16 02:09:41,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:09:41,962 INFO L225 Difference]: With dead ends: 1846 [2021-10-16 02:09:41,962 INFO L226 Difference]: Without dead ends: 1375 [2021-10-16 02:09:41,964 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:09:41,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2021-10-16 02:09:42,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 1371. [2021-10-16 02:09:42,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1371 states, 1370 states have (on average 1.4773722627737227) internal successors, (2024), 1370 states have internal predecessors, (2024), 0 states have call successors, (0), 0 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 02:09:42,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1371 states to 1371 states and 2024 transitions. [2021-10-16 02:09:42,048 INFO L78 Accepts]: Start accepts. Automaton has 1371 states and 2024 transitions. Word has length 124 [2021-10-16 02:09:42,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:09:42,049 INFO L470 AbstractCegarLoop]: Abstraction has 1371 states and 2024 transitions. [2021-10-16 02:09:42,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 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 02:09:42,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1371 states and 2024 transitions. [2021-10-16 02:09:42,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-10-16 02:09:42,052 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:09:42,053 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:09:42,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-16 02:09:42,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:09:42,268 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:09:42,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:09:42,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1920674126, now seen corresponding path program 1 times [2021-10-16 02:09:42,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:09:42,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1605077299] [2021-10-16 02:09:42,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:09:42,270 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:09:42,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:09:42,273 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:09:42,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-16 02:09:42,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:09:42,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:09:42,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:09:42,902 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-10-16 02:09:42,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:09:43,228 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-10-16 02:09:43,229 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:09:43,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1605077299] [2021-10-16 02:09:43,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1605077299] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:09:43,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:09:43,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-16 02:09:43,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916153456] [2021-10-16 02:09:43,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:09:43,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:09:43,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:09:43,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:09:43,232 INFO L87 Difference]: Start difference. First operand 1371 states and 2024 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:09:43,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:09:43,311 INFO L93 Difference]: Finished difference Result 2775 states and 4093 transitions. [2021-10-16 02:09:43,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:09:43,312 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-10-16 02:09:43,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:09:43,320 INFO L225 Difference]: With dead ends: 2775 [2021-10-16 02:09:43,321 INFO L226 Difference]: Without dead ends: 1412 [2021-10-16 02:09:43,323 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:09:43,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2021-10-16 02:09:43,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1412. [2021-10-16 02:09:43,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1411 states have (on average 1.4741318214032602) internal successors, (2080), 1411 states have internal predecessors, (2080), 0 states have call successors, (0), 0 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 02:09:43,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2080 transitions. [2021-10-16 02:09:43,387 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2080 transitions. Word has length 125 [2021-10-16 02:09:43,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:09:43,388 INFO L470 AbstractCegarLoop]: Abstraction has 1412 states and 2080 transitions. [2021-10-16 02:09:43,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:09:43,389 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2080 transitions. [2021-10-16 02:09:43,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-10-16 02:09:43,394 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:09:43,394 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:09:43,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-16 02:09:43,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:09:43,610 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:09:43,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:09:43,610 INFO L82 PathProgramCache]: Analyzing trace with hash 232432692, now seen corresponding path program 1 times [2021-10-16 02:09:43,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:09:43,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1247216854] [2021-10-16 02:09:43,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:09:43,611 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:09:43,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:09:43,611 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:09:43,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-16 02:09:43,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:09:43,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:09:43,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:09:44,196 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-10-16 02:09:44,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:09:44,518 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-10-16 02:09:44,518 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:09:44,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1247216854] [2021-10-16 02:09:44,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1247216854] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:09:44,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:09:44,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-16 02:09:44,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062942642] [2021-10-16 02:09:44,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:09:44,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:09:44,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:09:44,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:09:44,521 INFO L87 Difference]: Start difference. First operand 1412 states and 2080 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:09:44,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:09:44,579 INFO L93 Difference]: Finished difference Result 2829 states and 4162 transitions. [2021-10-16 02:09:44,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:09:44,580 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-10-16 02:09:44,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:09:44,589 INFO L225 Difference]: With dead ends: 2829 [2021-10-16 02:09:44,589 INFO L226 Difference]: Without dead ends: 1425 [2021-10-16 02:09:44,591 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:09:44,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2021-10-16 02:09:44,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 1425. [2021-10-16 02:09:44,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1425 states, 1424 states have (on average 1.4698033707865168) internal successors, (2093), 1424 states have internal predecessors, (2093), 0 states have call successors, (0), 0 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 02:09:44,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1425 states to 1425 states and 2093 transitions. [2021-10-16 02:09:44,666 INFO L78 Accepts]: Start accepts. Automaton has 1425 states and 2093 transitions. Word has length 125 [2021-10-16 02:09:44,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:09:44,666 INFO L470 AbstractCegarLoop]: Abstraction has 1425 states and 2093 transitions. [2021-10-16 02:09:44,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:09:44,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1425 states and 2093 transitions. [2021-10-16 02:09:44,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-10-16 02:09:44,670 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:09:44,670 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:09:44,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-16 02:09:44,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:09:44,883 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:09:44,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:09:44,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1349091851, now seen corresponding path program 1 times [2021-10-16 02:09:44,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:09:44,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1818772682] [2021-10-16 02:09:44,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:09:44,885 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:09:44,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:09:44,887 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:09:44,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-16 02:09:45,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:09:45,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:09:45,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:09:45,647 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-10-16 02:09:45,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:09:45,951 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-10-16 02:09:45,951 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:09:45,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1818772682] [2021-10-16 02:09:45,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1818772682] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:09:45,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:09:45,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-16 02:09:45,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451744356] [2021-10-16 02:09:45,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:09:45,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:09:45,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:09:45,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:09:45,954 INFO L87 Difference]: Start difference. First operand 1425 states and 2093 transitions. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 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 02:09:46,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:09:46,287 INFO L93 Difference]: Finished difference Result 3150 states and 4729 transitions. [2021-10-16 02:09:46,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:09:46,287 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 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 135 [2021-10-16 02:09:46,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:09:46,298 INFO L225 Difference]: With dead ends: 3150 [2021-10-16 02:09:46,298 INFO L226 Difference]: Without dead ends: 1746 [2021-10-16 02:09:46,301 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:09:46,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1746 states. [2021-10-16 02:09:46,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1746 to 1728. [2021-10-16 02:09:46,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1728 states, 1727 states have (on average 1.472495657209033) internal successors, (2543), 1727 states have internal predecessors, (2543), 0 states have call successors, (0), 0 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 02:09:46,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1728 states to 1728 states and 2543 transitions. [2021-10-16 02:09:46,371 INFO L78 Accepts]: Start accepts. Automaton has 1728 states and 2543 transitions. Word has length 135 [2021-10-16 02:09:46,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:09:46,371 INFO L470 AbstractCegarLoop]: Abstraction has 1728 states and 2543 transitions. [2021-10-16 02:09:46,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 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 02:09:46,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1728 states and 2543 transitions. [2021-10-16 02:09:46,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-10-16 02:09:46,375 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:09:46,376 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:09:46,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-16 02:09:46,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:09:46,589 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:09:46,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:09:46,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1818942413, now seen corresponding path program 1 times [2021-10-16 02:09:46,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:09:46,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [807209142] [2021-10-16 02:09:46,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:09:46,590 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:09:46,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:09:46,591 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:09:46,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-16 02:09:47,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:09:47,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:09:47,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:09:47,444 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 185 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-10-16 02:09:47,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:09:47,769 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 185 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-10-16 02:09:47,770 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:09:47,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [807209142] [2021-10-16 02:09:47,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [807209142] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:09:47,770 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:09:47,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-16 02:09:47,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378193789] [2021-10-16 02:09:47,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:09:47,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:09:47,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:09:47,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:09:47,772 INFO L87 Difference]: Start difference. First operand 1728 states and 2543 transitions. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:09:48,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:09:48,031 INFO L93 Difference]: Finished difference Result 3606 states and 5352 transitions. [2021-10-16 02:09:48,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:09:48,031 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 157 [2021-10-16 02:09:48,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:09:48,043 INFO L225 Difference]: With dead ends: 3606 [2021-10-16 02:09:48,043 INFO L226 Difference]: Without dead ends: 1899 [2021-10-16 02:09:48,046 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:09:48,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2021-10-16 02:09:48,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1839. [2021-10-16 02:09:48,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1839 states, 1838 states have (on average 1.4602829162132753) internal successors, (2684), 1838 states have internal predecessors, (2684), 0 states have call successors, (0), 0 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 02:09:48,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1839 states to 1839 states and 2684 transitions. [2021-10-16 02:09:48,127 INFO L78 Accepts]: Start accepts. Automaton has 1839 states and 2684 transitions. Word has length 157 [2021-10-16 02:09:48,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:09:48,128 INFO L470 AbstractCegarLoop]: Abstraction has 1839 states and 2684 transitions. [2021-10-16 02:09:48,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:09:48,128 INFO L276 IsEmpty]: Start isEmpty. Operand 1839 states and 2684 transitions. [2021-10-16 02:09:48,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-10-16 02:09:48,132 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:09:48,132 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:09:48,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-16 02:09:48,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:09:48,344 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:09:48,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:09:48,345 INFO L82 PathProgramCache]: Analyzing trace with hash -2016709837, now seen corresponding path program 1 times [2021-10-16 02:09:48,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:09:48,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [709918372] [2021-10-16 02:09:48,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:09:48,346 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:09:48,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:09:48,347 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:09:48,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-16 02:09:48,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:09:48,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:09:48,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:09:49,252 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 155 proven. 11 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-10-16 02:09:49,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:09:49,619 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 155 proven. 11 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-10-16 02:09:49,619 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:09:49,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [709918372] [2021-10-16 02:09:49,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [709918372] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:09:49,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1150107655] [2021-10-16 02:09:49,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:09:49,621 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:09:49,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:09:49,623 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:09:49,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-10-16 02:09:50,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:09:50,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:09:50,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:09:50,947 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2021-10-16 02:09:50,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:09:51,435 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2021-10-16 02:09:51,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1150107655] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:09:51,436 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-10-16 02:09:51,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4, 4] total 7 [2021-10-16 02:09:51,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006440660] [2021-10-16 02:09:51,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:09:51,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:09:51,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:09:51,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:09:51,438 INFO L87 Difference]: Start difference. First operand 1839 states and 2684 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:09:51,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:09:51,522 INFO L93 Difference]: Finished difference Result 5474 states and 7986 transitions. [2021-10-16 02:09:51,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:09:51,523 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 172 [2021-10-16 02:09:51,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:09:51,544 INFO L225 Difference]: With dead ends: 5474 [2021-10-16 02:09:51,544 INFO L226 Difference]: Without dead ends: 3656 [2021-10-16 02:09:51,547 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 684 GetRequests, 679 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 18.3ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:09:51,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3656 states. [2021-10-16 02:09:51,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3656 to 3654. [2021-10-16 02:09:51,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3654 states, 3653 states have (on average 1.4571584998631262) internal successors, (5323), 3653 states have internal predecessors, (5323), 0 states have call successors, (0), 0 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 02:09:51,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3654 states to 3654 states and 5323 transitions. [2021-10-16 02:09:51,700 INFO L78 Accepts]: Start accepts. Automaton has 3654 states and 5323 transitions. Word has length 172 [2021-10-16 02:09:51,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:09:51,701 INFO L470 AbstractCegarLoop]: Abstraction has 3654 states and 5323 transitions. [2021-10-16 02:09:51,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:09:51,702 INFO L276 IsEmpty]: Start isEmpty. Operand 3654 states and 5323 transitions. [2021-10-16 02:09:51,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-10-16 02:09:51,707 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:09:51,709 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:09:51,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-16 02:09:51,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-10-16 02:09:52,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:09:52,125 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:09:52,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:09:52,126 INFO L82 PathProgramCache]: Analyzing trace with hash 594356241, now seen corresponding path program 1 times [2021-10-16 02:09:52,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:09:52,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [231875550] [2021-10-16 02:09:52,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:09:52,126 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:09:52,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:09:52,127 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:09:52,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-16 02:09:52,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:09:52,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:09:52,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:09:53,188 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 155 proven. 11 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-10-16 02:09:53,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:09:53,543 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 155 proven. 11 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-10-16 02:09:53,543 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:09:53,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [231875550] [2021-10-16 02:09:53,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [231875550] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:09:53,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [274486585] [2021-10-16 02:09:53,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:09:53,546 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:09:53,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:09:53,547 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:09:53,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-10-16 02:09:54,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:09:54,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:09:54,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:09:54,934 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 155 proven. 11 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-10-16 02:09:54,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:09:55,229 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 155 proven. 11 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-10-16 02:09:55,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [274486585] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:09:55,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970513587] [2021-10-16 02:09:55,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:09:55,231 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:09:55,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:09:55,244 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:09:55,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-16 02:09:56,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:09:56,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:09:56,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:09:56,504 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 155 proven. 11 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-10-16 02:09:56,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:09:56,799 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 155 proven. 11 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-10-16 02:09:56,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970513587] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:09:56,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:09:56,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 6 [2021-10-16 02:09:56,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786923898] [2021-10-16 02:09:56,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:09:56,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:09:56,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:09:56,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:09:56,802 INFO L87 Difference]: Start difference. First operand 3654 states and 5323 transitions. Second operand has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 02:09:57,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:09:57,565 INFO L93 Difference]: Finished difference Result 11636 states and 16664 transitions. [2021-10-16 02:09:57,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-16 02:09:57,566 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 0 states have call successors, (0), 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 173 [2021-10-16 02:09:57,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:09:57,610 INFO L225 Difference]: With dead ends: 11636 [2021-10-16 02:09:57,611 INFO L226 Difference]: Without dead ends: 7855 [2021-10-16 02:09:57,616 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1039 GetRequests, 1031 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 38.9ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:09:57,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7855 states. [2021-10-16 02:09:57,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7855 to 4110. [2021-10-16 02:09:57,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4110 states, 4109 states have (on average 1.4575322462886346) internal successors, (5989), 4109 states have internal predecessors, (5989), 0 states have call successors, (0), 0 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 02:09:57,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4110 states to 4110 states and 5989 transitions. [2021-10-16 02:09:57,853 INFO L78 Accepts]: Start accepts. Automaton has 4110 states and 5989 transitions. Word has length 173 [2021-10-16 02:09:57,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:09:57,854 INFO L470 AbstractCegarLoop]: Abstraction has 4110 states and 5989 transitions. [2021-10-16 02:09:57,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 02:09:57,854 INFO L276 IsEmpty]: Start isEmpty. Operand 4110 states and 5989 transitions. [2021-10-16 02:09:57,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-10-16 02:09:57,861 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:09:57,861 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:09:57,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-10-16 02:09:58,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-16 02:09:58,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-16 02:09:58,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:09:58,479 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:09:58,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:09:58,479 INFO L82 PathProgramCache]: Analyzing trace with hash 2064828328, now seen corresponding path program 1 times [2021-10-16 02:09:58,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:09:58,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1244651477] [2021-10-16 02:09:58,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:09:58,480 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:09:58,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:09:58,482 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:09:58,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-16 02:09:59,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:09:59,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:09:59,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:09:59,688 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 113 proven. 6 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-10-16 02:09:59,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:10:00,034 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 113 proven. 6 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-10-16 02:10:00,034 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:10:00,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1244651477] [2021-10-16 02:10:00,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1244651477] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:10:00,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1579116165] [2021-10-16 02:10:00,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:10:00,035 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:10:00,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:10:00,042 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:10:00,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-10-16 02:10:01,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:10:01,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:10:01,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:10:01,724 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 113 proven. 6 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-10-16 02:10:01,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:10:02,057 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 113 proven. 6 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-10-16 02:10:02,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1579116165] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:10:02,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775327231] [2021-10-16 02:10:02,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:10:02,058 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:10:02,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:10:02,058 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:10:02,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-16 02:10:03,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:10:03,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:10:03,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:10:03,610 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 113 proven. 6 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-10-16 02:10:03,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:10:03,909 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 113 proven. 6 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-10-16 02:10:03,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775327231] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:10:03,909 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:10:03,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 6 [2021-10-16 02:10:03,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50654680] [2021-10-16 02:10:03,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:10:03,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:10:03,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:10:03,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:10:03,915 INFO L87 Difference]: Start difference. First operand 4110 states and 5989 transitions. Second operand has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 0 states have call successors, (0), 0 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 02:10:04,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:10:04,980 INFO L93 Difference]: Finished difference Result 12267 states and 17583 transitions. [2021-10-16 02:10:04,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-16 02:10:04,981 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 0 states have call successors, (0), 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 180 [2021-10-16 02:10:04,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:10:05,025 INFO L225 Difference]: With dead ends: 12267 [2021-10-16 02:10:05,025 INFO L226 Difference]: Without dead ends: 8192 [2021-10-16 02:10:05,032 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1082 GetRequests, 1074 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 42.8ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:10:05,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8192 states. [2021-10-16 02:10:05,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8192 to 4114. [2021-10-16 02:10:05,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4114 states, 4113 states have (on average 1.401653294432288) internal successors, (5765), 4113 states have internal predecessors, (5765), 0 states have call successors, (0), 0 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 02:10:05,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4114 states to 4114 states and 5765 transitions. [2021-10-16 02:10:05,272 INFO L78 Accepts]: Start accepts. Automaton has 4114 states and 5765 transitions. Word has length 180 [2021-10-16 02:10:05,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:10:05,273 INFO L470 AbstractCegarLoop]: Abstraction has 4114 states and 5765 transitions. [2021-10-16 02:10:05,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 0 states have call successors, (0), 0 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 02:10:05,273 INFO L276 IsEmpty]: Start isEmpty. Operand 4114 states and 5765 transitions. [2021-10-16 02:10:05,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-10-16 02:10:05,285 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:10:05,286 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:10:05,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-16 02:10:05,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-10-16 02:10:05,723 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-10-16 02:10:05,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:10:05,900 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:10:05,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:10:05,901 INFO L82 PathProgramCache]: Analyzing trace with hash -287231457, now seen corresponding path program 1 times [2021-10-16 02:10:05,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:10:05,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [703132990] [2021-10-16 02:10:05,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:10:05,902 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:10:05,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:10:05,902 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:10:05,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-16 02:10:06,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:10:06,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:10:06,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:10:07,330 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 189 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-10-16 02:10:07,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:10:07,778 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 189 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-10-16 02:10:07,778 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:10:07,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [703132990] [2021-10-16 02:10:07,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [703132990] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:10:07,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:10:07,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-16 02:10:07,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194427489] [2021-10-16 02:10:07,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:10:07,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:10:07,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:10:07,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:10:07,781 INFO L87 Difference]: Start difference. First operand 4114 states and 5765 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 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 02:10:07,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:10:07,919 INFO L93 Difference]: Finished difference Result 10720 states and 14851 transitions. [2021-10-16 02:10:07,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:10:07,919 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 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 180 [2021-10-16 02:10:07,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:10:07,934 INFO L225 Difference]: With dead ends: 10720 [2021-10-16 02:10:07,934 INFO L226 Difference]: Without dead ends: 6641 [2021-10-16 02:10:07,940 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 357 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:10:07,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6641 states. [2021-10-16 02:10:08,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6641 to 6639. [2021-10-16 02:10:08,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6639 states, 6638 states have (on average 1.371798734558602) internal successors, (9106), 6638 states have internal predecessors, (9106), 0 states have call successors, (0), 0 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 02:10:08,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6639 states to 6639 states and 9106 transitions. [2021-10-16 02:10:08,205 INFO L78 Accepts]: Start accepts. Automaton has 6639 states and 9106 transitions. Word has length 180 [2021-10-16 02:10:08,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:10:08,206 INFO L470 AbstractCegarLoop]: Abstraction has 6639 states and 9106 transitions. [2021-10-16 02:10:08,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 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 02:10:08,207 INFO L276 IsEmpty]: Start isEmpty. Operand 6639 states and 9106 transitions. [2021-10-16 02:10:08,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-10-16 02:10:08,217 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:10:08,217 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:10:08,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-16 02:10:08,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:10:08,437 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:10:08,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:10:08,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1859806535, now seen corresponding path program 1 times [2021-10-16 02:10:08,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:10:08,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1575055811] [2021-10-16 02:10:08,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:10:08,438 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:10:08,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:10:08,439 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:10:08,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-16 02:10:09,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:10:09,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:10:09,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:10:10,069 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2021-10-16 02:10:10,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:10:10,411 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2021-10-16 02:10:10,411 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:10:10,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1575055811] [2021-10-16 02:10:10,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1575055811] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:10:10,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:10:10,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-16 02:10:10,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106774698] [2021-10-16 02:10:10,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:10:10,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:10:10,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:10:10,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:10:10,414 INFO L87 Difference]: Start difference. First operand 6639 states and 9106 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:10,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:10:10,859 INFO L93 Difference]: Finished difference Result 14451 states and 20138 transitions. [2021-10-16 02:10:10,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:10:10,859 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 191 [2021-10-16 02:10:10,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:10:10,877 INFO L225 Difference]: With dead ends: 14451 [2021-10-16 02:10:10,877 INFO L226 Difference]: Without dead ends: 7847 [2021-10-16 02:10:10,886 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:10:10,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7847 states. [2021-10-16 02:10:11,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7847 to 7643. [2021-10-16 02:10:11,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7643 states, 7642 states have (on average 1.4019890081130595) internal successors, (10714), 7642 states have internal predecessors, (10714), 0 states have call successors, (0), 0 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 02:10:11,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7643 states to 7643 states and 10714 transitions. [2021-10-16 02:10:11,155 INFO L78 Accepts]: Start accepts. Automaton has 7643 states and 10714 transitions. Word has length 191 [2021-10-16 02:10:11,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:10:11,155 INFO L470 AbstractCegarLoop]: Abstraction has 7643 states and 10714 transitions. [2021-10-16 02:10:11,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:11,156 INFO L276 IsEmpty]: Start isEmpty. Operand 7643 states and 10714 transitions. [2021-10-16 02:10:11,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-10-16 02:10:11,166 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:10:11,166 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:10:11,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-16 02:10:11,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:10:11,381 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:10:11,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:10:11,382 INFO L82 PathProgramCache]: Analyzing trace with hash -2051917229, now seen corresponding path program 1 times [2021-10-16 02:10:11,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:10:11,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1168874364] [2021-10-16 02:10:11,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:10:11,382 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:10:11,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:10:11,383 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:10:11,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-16 02:10:12,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 02:10:12,613 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-16 02:10:12,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 02:10:12,971 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-16 02:10:12,972 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-16 02:10:12,973 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:10:12,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-10-16 02:10:13,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:10:13,188 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 02:10:13,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:10:13 BoogieIcfgContainer [2021-10-16 02:10:13,331 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 02:10:13,331 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 02:10:13,331 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 02:10:13,332 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 02:10:13,332 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:09:34" (3/4) ... [2021-10-16 02:10:13,334 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-16 02:10:13,503 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/witness.graphml [2021-10-16 02:10:13,503 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 02:10:13,508 INFO L168 Benchmark]: Toolchain (without parser) took 40598.75 ms. Allocated memory was 58.7 MB in the beginning and 379.6 MB in the end (delta: 320.9 MB). Free memory was 35.9 MB in the beginning and 118.2 MB in the end (delta: -82.3 MB). Peak memory consumption was 240.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:10:13,508 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 58.7 MB. Free memory was 39.7 MB in the beginning and 39.6 MB in the end (delta: 44.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:10:13,509 INFO L168 Benchmark]: CACSL2BoogieTranslator took 409.18 ms. Allocated memory is still 58.7 MB. Free memory was 35.7 MB in the beginning and 35.5 MB in the end (delta: 201.4 kB). Peak memory consumption was 13.6 MB. Max. memory is 16.1 GB. [2021-10-16 02:10:13,510 INFO L168 Benchmark]: Boogie Procedure Inliner took 74.15 ms. Allocated memory is still 58.7 MB. Free memory was 35.5 MB in the beginning and 32.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:10:13,510 INFO L168 Benchmark]: Boogie Preprocessor took 70.04 ms. Allocated memory is still 58.7 MB. Free memory was 32.8 MB in the beginning and 30.6 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:10:13,511 INFO L168 Benchmark]: RCFGBuilder took 931.70 ms. Allocated memory was 58.7 MB in the beginning and 73.4 MB in the end (delta: 14.7 MB). Free memory was 30.6 MB in the beginning and 50.5 MB in the end (delta: -19.9 MB). Peak memory consumption was 14.6 MB. Max. memory is 16.1 GB. [2021-10-16 02:10:13,511 INFO L168 Benchmark]: TraceAbstraction took 38932.44 ms. Allocated memory was 73.4 MB in the beginning and 379.6 MB in the end (delta: 306.2 MB). Free memory was 49.9 MB in the beginning and 136.0 MB in the end (delta: -86.1 MB). Peak memory consumption was 220.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:10:13,512 INFO L168 Benchmark]: Witness Printer took 171.84 ms. Allocated memory is still 379.6 MB. Free memory was 136.0 MB in the beginning and 118.2 MB in the end (delta: 17.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-10-16 02:10:13,515 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 58.7 MB. Free memory was 39.7 MB in the beginning and 39.6 MB in the end (delta: 44.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 409.18 ms. Allocated memory is still 58.7 MB. Free memory was 35.7 MB in the beginning and 35.5 MB in the end (delta: 201.4 kB). Peak memory consumption was 13.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 74.15 ms. Allocated memory is still 58.7 MB. Free memory was 35.5 MB in the beginning and 32.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 70.04 ms. Allocated memory is still 58.7 MB. Free memory was 32.8 MB in the beginning and 30.6 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 931.70 ms. Allocated memory was 58.7 MB in the beginning and 73.4 MB in the end (delta: 14.7 MB). Free memory was 30.6 MB in the beginning and 50.5 MB in the end (delta: -19.9 MB). Peak memory consumption was 14.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 38932.44 ms. Allocated memory was 73.4 MB in the beginning and 379.6 MB in the end (delta: 306.2 MB). Free memory was 49.9 MB in the beginning and 136.0 MB in the end (delta: -86.1 MB). Peak memory consumption was 220.5 MB. Max. memory is 16.1 GB. * Witness Printer took 171.84 ms. Allocated memory is still 379.6 MB. Free memory was 136.0 MB in the beginning and 118.2 MB in the end (delta: 17.8 MB). Peak memory consumption was 16.8 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: 642]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L647] int s ; [L648] int tmp ; [L652] s = 8464 [L24] int s__info_callback = __VERIFIER_nondet_int() ; [L25] int s__in_handshake = __VERIFIER_nondet_int() ; [L26] int s__state ; [L27] int s__new_session ; [L28] int s__server ; [L29] int s__version = __VERIFIER_nondet_int() ; [L30] int s__type ; [L31] int s__init_num ; [L32] int s__hit = __VERIFIER_nondet_int() ; [L33] int s__rwstate ; [L34] int s__init_buf___0 = 1; [L35] int s__debug = __VERIFIER_nondet_int() ; [L36] int s__shutdown ; [L37] int s__cert = __VERIFIER_nondet_int() ; [L38] int s__options = __VERIFIER_nondet_int() ; [L39] int s__verify_mode = __VERIFIER_nondet_int() ; [L40] int s__session__peer = __VERIFIER_nondet_int() ; [L41] int s__cert__pkeys__AT0__privatekey = __VERIFIER_nondet_int() ; [L42] int s__ctx__info_callback = __VERIFIER_nondet_int() ; [L43] int s__ctx__stats__sess_accept_renegotiate = __VERIFIER_nondet_int() ; [L44] int s__ctx__stats__sess_accept = __VERIFIER_nondet_int() ; [L45] int s__ctx__stats__sess_accept_good = __VERIFIER_nondet_int() ; [L46] int s__s3__tmp__cert_request ; [L47] int s__s3__tmp__reuse_message = __VERIFIER_nondet_int() ; [L48] int s__s3__tmp__use_rsa_tmp ; [L49] int s__s3__tmp__new_cipher = __VERIFIER_nondet_int() ; [L50] int s__s3__tmp__new_cipher__algorithms ; [L51] int s__s3__tmp__next_state___0 ; [L52] int s__s3__tmp__new_cipher__algo_strength ; [L53] int s__session__cipher ; [L54] int buf ; [L55] unsigned long l ; [L56] unsigned long Time ; [L57] unsigned long tmp ; [L58] int cb ; [L59] long num1 = __VERIFIER_nondet_long() ; [L60] int ret ; [L61] int new_state ; [L62] int state ; [L63] int skip ; [L64] int got_new_session ; [L65] int tmp___1 = __VERIFIER_nondet_int() ; [L66] int tmp___2 = __VERIFIER_nondet_int() ; [L67] int tmp___3 = __VERIFIER_nondet_int() ; [L68] int tmp___4 = __VERIFIER_nondet_int() ; [L69] int tmp___5 = __VERIFIER_nondet_int() ; [L70] int tmp___6 = __VERIFIER_nondet_int() ; [L71] int tmp___7 = __VERIFIER_nondet_int() ; [L72] long tmp___8 = __VERIFIER_nondet_long() ; [L73] int tmp___9 = __VERIFIER_nondet_int() ; [L74] int tmp___10 = __VERIFIER_nondet_int() ; [L75] int blastFlag ; [L76] int __cil_tmp55 ; [L77] unsigned long __cil_tmp56 ; [L78] unsigned long __cil_tmp57 ; [L79] unsigned long __cil_tmp58 = __VERIFIER_nondet_ulong() ; [L80] unsigned long __cil_tmp59 ; [L81] int __cil_tmp60 ; [L82] unsigned long __cil_tmp61 ; [L85] s__state = initial_state [L86] blastFlag = 0 [L87] tmp = __VERIFIER_nondet_int() [L88] Time = tmp [L89] cb = 0 [L90] ret = -1 [L91] skip = 0 [L92] got_new_session = 0 [L93] COND TRUE s__info_callback != 0 [L94] cb = s__info_callback [L100] s__in_handshake ++ [L101] COND TRUE tmp___1 + 12288 [L102] COND TRUE tmp___2 + 16384 [L106] COND FALSE !(s__cert == 0) [L110] COND TRUE 1 [L112] state = s__state [L113] COND FALSE !(s__state == 12292) [L116] COND FALSE !(s__state == 16384) [L119] COND FALSE !(s__state == 8192) [L122] COND FALSE !(s__state == 24576) [L125] COND FALSE !(s__state == 8195) [L128] COND FALSE !(s__state == 8480) [L131] COND FALSE !(s__state == 8481) [L134] COND FALSE !(s__state == 8482) [L137] COND TRUE s__state == 8464 [L283] s__shutdown = 0 [L284] ret = __VERIFIER_nondet_int() [L285] COND TRUE blastFlag == 0 [L286] blastFlag = 1 [L288] COND FALSE !(ret <= 0) [L291] got_new_session = 1 [L292] s__state = 8496 [L293] s__init_num = 0 [L596] COND FALSE !(! s__s3__tmp__reuse_message) [L614] COND FALSE !(state == 8576) [L631] skip = 0 [L110] COND TRUE 1 [L112] state = s__state [L113] COND FALSE !(s__state == 12292) [L116] COND FALSE !(s__state == 16384) [L119] COND FALSE !(s__state == 8192) [L122] COND FALSE !(s__state == 24576) [L125] COND FALSE !(s__state == 8195) [L128] COND FALSE !(s__state == 8480) [L131] COND FALSE !(s__state == 8481) [L134] COND FALSE !(s__state == 8482) [L137] COND FALSE !(s__state == 8464) [L140] COND FALSE !(s__state == 8465) [L143] COND FALSE !(s__state == 8466) [L146] COND TRUE s__state == 8496 [L297] ret = __VERIFIER_nondet_int() [L298] COND TRUE blastFlag == 1 [L299] blastFlag = 2 [L305] COND FALSE !(ret <= 0) [L308] COND FALSE !(\read(s__hit)) [L311] s__state = 8512 [L313] s__init_num = 0 [L596] COND FALSE !(! s__s3__tmp__reuse_message) [L614] COND FALSE !(state == 8576) [L631] skip = 0 [L110] COND TRUE 1 [L112] state = s__state [L113] COND FALSE !(s__state == 12292) [L116] COND FALSE !(s__state == 16384) [L119] COND FALSE !(s__state == 8192) [L122] COND FALSE !(s__state == 24576) [L125] COND FALSE !(s__state == 8195) [L128] COND FALSE !(s__state == 8480) [L131] COND FALSE !(s__state == 8481) [L134] COND FALSE !(s__state == 8482) [L137] COND FALSE !(s__state == 8464) [L140] COND FALSE !(s__state == 8465) [L143] COND FALSE !(s__state == 8466) [L146] COND FALSE !(s__state == 8496) [L149] COND FALSE !(s__state == 8497) [L152] COND TRUE s__state == 8512 [L318] s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int() [L319] __cil_tmp56 = (unsigned long )s__s3__tmp__new_cipher__algorithms [L320] COND TRUE __cil_tmp56 + 256UL [L321] skip = 1 [L329] s__state = 8528 [L330] s__init_num = 0 [L596] COND FALSE !(! s__s3__tmp__reuse_message) [L614] COND FALSE !(state == 8576) [L631] skip = 0 [L110] COND TRUE 1 [L112] state = s__state [L113] COND FALSE !(s__state == 12292) [L116] COND FALSE !(s__state == 16384) [L119] COND FALSE !(s__state == 8192) [L122] COND FALSE !(s__state == 24576) [L125] COND FALSE !(s__state == 8195) [L128] COND FALSE !(s__state == 8480) [L131] COND FALSE !(s__state == 8481) [L134] COND FALSE !(s__state == 8482) [L137] COND FALSE !(s__state == 8464) [L140] COND FALSE !(s__state == 8465) [L143] COND FALSE !(s__state == 8466) [L146] COND FALSE !(s__state == 8496) [L149] COND FALSE !(s__state == 8497) [L152] COND FALSE !(s__state == 8512) [L155] COND FALSE !(s__state == 8513) [L158] COND TRUE s__state == 8528 [L334] s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int() [L335] l = (unsigned long )s__s3__tmp__new_cipher__algorithms [L337] __cil_tmp57 = (unsigned long )s__options [L338] COND TRUE __cil_tmp57 + 2097152UL [L339] s__s3__tmp__use_rsa_tmp = 1 [L344] COND TRUE \read(s__s3__tmp__use_rsa_tmp) [L371] ret = __VERIFIER_nondet_int() [L372] COND FALSE !(ret <= 0) [L389] s__state = 8544 [L390] s__init_num = 0 [L596] COND FALSE !(! s__s3__tmp__reuse_message) [L614] COND FALSE !(state == 8576) [L631] skip = 0 [L110] COND TRUE 1 [L112] state = s__state [L113] COND FALSE !(s__state == 12292) [L116] COND FALSE !(s__state == 16384) [L119] COND FALSE !(s__state == 8192) [L122] COND FALSE !(s__state == 24576) [L125] COND FALSE !(s__state == 8195) [L128] COND FALSE !(s__state == 8480) [L131] COND FALSE !(s__state == 8481) [L134] COND FALSE !(s__state == 8482) [L137] COND FALSE !(s__state == 8464) [L140] COND FALSE !(s__state == 8465) [L143] COND FALSE !(s__state == 8466) [L146] COND FALSE !(s__state == 8496) [L149] COND FALSE !(s__state == 8497) [L152] COND FALSE !(s__state == 8512) [L155] COND FALSE !(s__state == 8513) [L158] COND FALSE !(s__state == 8528) [L161] COND FALSE !(s__state == 8529) [L164] COND TRUE s__state == 8544 [L394] COND TRUE s__verify_mode + 1 [L395] COND FALSE !(s__session__peer != 0) [L406] s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int() [L407] __cil_tmp61 = (unsigned long )s__s3__tmp__new_cipher__algorithms [L408] COND FALSE !(__cil_tmp61 + 256UL) [L418] s__s3__tmp__cert_request = 1 [L419] ret = __VERIFIER_nondet_int() [L420] COND FALSE !(ret <= 0) [L423] s__state = 8448 [L424] s__s3__tmp__next_state___0 = 8576 [L425] s__init_num = 0 [L596] COND FALSE !(! s__s3__tmp__reuse_message) [L614] COND FALSE !(state == 8576) [L631] skip = 0 [L110] COND TRUE 1 [L112] state = s__state [L113] COND FALSE !(s__state == 12292) [L116] COND FALSE !(s__state == 16384) [L119] COND FALSE !(s__state == 8192) [L122] COND FALSE !(s__state == 24576) [L125] COND FALSE !(s__state == 8195) [L128] COND FALSE !(s__state == 8480) [L131] COND FALSE !(s__state == 8481) [L134] COND FALSE !(s__state == 8482) [L137] COND FALSE !(s__state == 8464) [L140] COND FALSE !(s__state == 8465) [L143] COND FALSE !(s__state == 8466) [L146] COND FALSE !(s__state == 8496) [L149] COND FALSE !(s__state == 8497) [L152] COND FALSE !(s__state == 8512) [L155] COND FALSE !(s__state == 8513) [L158] COND FALSE !(s__state == 8528) [L161] COND FALSE !(s__state == 8529) [L164] COND FALSE !(s__state == 8544) [L167] COND FALSE !(s__state == 8545) [L170] COND FALSE !(s__state == 8560) [L173] COND FALSE !(s__state == 8561) [L176] COND TRUE s__state == 8448 [L446] COND FALSE !(num1 > 0L) [L455] s__state = s__s3__tmp__next_state___0 [L596] COND FALSE !(! s__s3__tmp__reuse_message) [L614] COND FALSE !(state == 8576) [L631] skip = 0 [L110] COND TRUE 1 [L112] state = s__state [L113] COND FALSE !(s__state == 12292) [L116] COND FALSE !(s__state == 16384) [L119] COND FALSE !(s__state == 8192) [L122] COND FALSE !(s__state == 24576) [L125] COND FALSE !(s__state == 8195) [L128] COND FALSE !(s__state == 8480) [L131] COND FALSE !(s__state == 8481) [L134] COND FALSE !(s__state == 8482) [L137] COND FALSE !(s__state == 8464) [L140] COND FALSE !(s__state == 8465) [L143] COND FALSE !(s__state == 8466) [L146] COND FALSE !(s__state == 8496) [L149] COND FALSE !(s__state == 8497) [L152] COND FALSE !(s__state == 8512) [L155] COND FALSE !(s__state == 8513) [L158] COND FALSE !(s__state == 8528) [L161] COND FALSE !(s__state == 8529) [L164] COND FALSE !(s__state == 8544) [L167] COND FALSE !(s__state == 8545) [L170] COND FALSE !(s__state == 8560) [L173] COND FALSE !(s__state == 8561) [L176] COND FALSE !(s__state == 8448) [L179] COND TRUE s__state == 8576 [L459] ret = __VERIFIER_nondet_int() [L460] COND FALSE !(ret <= 0) [L463] COND FALSE !(ret == 2) [L466] ret = __VERIFIER_nondet_int() [L467] COND FALSE !(ret <= 0) [L470] s__init_num = 0 [L471] s__state = 8592 [L596] COND FALSE !(! s__s3__tmp__reuse_message) [L614] COND TRUE state == 8576 [L615] COND TRUE s__state == 8592 [L616] COND TRUE tmp___1 != -12288 [L617] COND TRUE tmp___2 != -16384 [L618] COND TRUE __cil_tmp56 != 4294967040 [L619] COND TRUE __cil_tmp58 != 4294967294 [L620] COND TRUE tmp___7 != 1024 [L621] COND TRUE tmp___7 != 512 [L642] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 149 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 38728.3ms, OverallIterations: 17, TraceHistogramMax: 7, EmptinessCheckTime: 90.5ms, AutomataDifference: 5241.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 3638 SDtfs, 3263 SDslu, 3940 SDs, 0 SdLazy, 3152 SolverSat, 547 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2493.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5633 GetRequests, 5587 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 205.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=7643occurred in iteration=16, InterpolantAutomatonStates: 70, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1753.7ms AutomataMinimizationTime, 16 MinimizatonAttempts, 8215 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 347.5ms SsaConstructionTime, 955.7ms SatisfiabilityAnalysisTime, 12946.8ms InterpolantComputationTime, 3020 NumberOfCodeBlocks, 3020 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 5614 ConstructedInterpolants, 0 QuantifiedInterpolants, 9939 SizeOfPredicates, 14 NumberOfNonLiveVariables, 3787 ConjunctsInSsa, 56 ConjunctsInUnsatCore, 42 InterpolantComputations, 28 PerfectInterpolantSequences, 7492/7616 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 02:10:13,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3067c5a-511d-48db-b3c5-f98111b51715/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...