./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl-simplified/s3_srvr_12.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_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/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_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl-simplified/s3_srvr_12.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/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_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/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 63398fb43fea7115c7e884d3b48ce08d551bf723 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/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_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl-simplified/s3_srvr_12.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/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_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/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 63398fb43fea7115c7e884d3b48ce08d551bf723 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:22:00,387 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:22:00,389 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:22:00,442 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:22:00,443 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:22:00,444 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:22:00,446 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:22:00,448 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:22:00,450 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:22:00,451 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:22:00,453 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:22:00,454 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:22:00,455 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:22:00,456 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:22:00,458 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:22:00,459 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:22:00,460 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:22:00,461 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:22:00,464 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:22:00,466 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:22:00,468 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:22:00,470 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:22:00,472 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:22:00,473 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:22:00,477 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:22:00,477 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:22:00,478 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:22:00,479 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:22:00,479 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:22:00,481 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:22:00,481 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:22:00,482 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:22:00,483 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:22:00,484 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:22:00,485 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:22:00,486 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:22:00,487 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:22:00,487 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:22:00,487 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:22:00,489 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:22:00,489 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:22:00,493 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 02:22:00,537 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:22:00,538 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:22:00,539 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:22:00,539 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:22:00,539 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:22:00,540 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:22:00,540 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:22:00,541 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:22:00,541 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:22:00,541 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:22:00,542 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:22:00,542 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:22:00,543 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:22:00,543 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:22:00,543 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:22:00,544 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:22:00,545 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:22:00,545 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:22:00,557 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:22:00,557 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:22:00,558 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:22:00,558 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:22:00,558 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:22:00,559 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:22:00,559 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:22:00,559 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:22:00,560 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:22:00,560 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:22:00,561 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:22:00,561 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:22:00,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:22:00,562 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:22:00,562 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:22:00,562 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:22:00,563 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:22:00,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:22:00,563 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:22:00,564 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:22:00,564 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:22:00,564 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_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 63398fb43fea7115c7e884d3b48ce08d551bf723 [2021-10-16 02:22:00,829 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:22:00,865 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:22:00,868 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:22:00,870 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:22:00,871 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:22:00,872 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/openssl-simplified/s3_srvr_12.cil.c [2021-10-16 02:22:00,941 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/data/847d6ed97/c0356fbb1bb84a4ebd0009705d1ffe0d/FLAGb62222371 [2021-10-16 02:22:01,528 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:22:01,529 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/sv-benchmarks/c/openssl-simplified/s3_srvr_12.cil.c [2021-10-16 02:22:01,554 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/data/847d6ed97/c0356fbb1bb84a4ebd0009705d1ffe0d/FLAGb62222371 [2021-10-16 02:22:01,849 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/data/847d6ed97/c0356fbb1bb84a4ebd0009705d1ffe0d [2021-10-16 02:22:01,851 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:22:01,853 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:22:01,859 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:22:01,860 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:22:01,863 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:22:01,863 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:22:01" (1/1) ... [2021-10-16 02:22:01,865 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7916ef3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:22:01, skipping insertion in model container [2021-10-16 02:22:01,866 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:22:01" (1/1) ... [2021-10-16 02:22:01,872 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:22:01,914 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:22:02,129 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_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/sv-benchmarks/c/openssl-simplified/s3_srvr_12.cil.c[49672,49685] [2021-10-16 02:22:02,152 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:22:02,169 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:22:02,233 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_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/sv-benchmarks/c/openssl-simplified/s3_srvr_12.cil.c[49672,49685] [2021-10-16 02:22:02,246 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:22:02,260 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:22:02,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:22:02 WrapperNode [2021-10-16 02:22:02,261 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:22:02,262 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:22:02,263 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:22:02,263 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:22:02,269 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:22:02" (1/1) ... [2021-10-16 02:22:02,295 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:22:02" (1/1) ... [2021-10-16 02:22:02,344 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:22:02,345 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:22:02,345 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:22:02,345 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:22:02,354 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:22:02" (1/1) ... [2021-10-16 02:22:02,355 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:22:02" (1/1) ... [2021-10-16 02:22:02,360 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:22:02" (1/1) ... [2021-10-16 02:22:02,360 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:22:02" (1/1) ... [2021-10-16 02:22:02,382 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:22:02" (1/1) ... [2021-10-16 02:22:02,405 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:22:02" (1/1) ... [2021-10-16 02:22:02,408 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:22:02" (1/1) ... [2021-10-16 02:22:02,413 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:22:02,414 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:22:02,414 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:22:02,414 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:22:02,415 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:22:02" (1/1) ... [2021-10-16 02:22:02,431 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:22:02,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:22:02,467 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:22:02,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:22:02,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 02:22:02,531 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:22:02,534 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:22:02,534 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:22:02,704 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-10-16 02:22:03,365 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-10-16 02:22:03,365 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-10-16 02:22:03,904 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:22:03,904 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-16 02:22:03,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:22:03 BoogieIcfgContainer [2021-10-16 02:22:03,907 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:22:03,909 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:22:03,910 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:22:03,913 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:22:03,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:22:01" (1/3) ... [2021-10-16 02:22:03,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@159d8b40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:22:03, skipping insertion in model container [2021-10-16 02:22:03,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:22:02" (2/3) ... [2021-10-16 02:22:03,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@159d8b40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:22:03, skipping insertion in model container [2021-10-16 02:22:03,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:22:03" (3/3) ... [2021-10-16 02:22:03,918 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr_12.cil.c [2021-10-16 02:22:03,928 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:22:03,928 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:22:03,997 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:22:04,006 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-16 02:22:04,007 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 02:22:04,033 INFO L276 IsEmpty]: Start isEmpty. Operand has 119 states, 117 states have (on average 1.7863247863247864) internal successors, (209), 118 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:04,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-16 02:22:04,039 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:22:04,040 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] [2021-10-16 02:22:04,041 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:22:04,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:22:04,047 INFO L82 PathProgramCache]: Analyzing trace with hash 155482716, now seen corresponding path program 1 times [2021-10-16 02:22:04,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:22:04,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025329132] [2021-10-16 02:22:04,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:22:04,060 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:22:04,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:22:04,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:22:04,383 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:22:04,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025329132] [2021-10-16 02:22:04,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025329132] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:22:04,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:22:04,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:22:04,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328805580] [2021-10-16 02:22:04,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:22:04,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:22:04,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:22:04,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:22:04,416 INFO L87 Difference]: Start difference. First operand has 119 states, 117 states have (on average 1.7863247863247864) internal successors, (209), 118 states have internal predecessors, (209), 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 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:04,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:22:04,677 INFO L93 Difference]: Finished difference Result 260 states and 455 transitions. [2021-10-16 02:22:04,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:22:04,679 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-16 02:22:04,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:22:04,694 INFO L225 Difference]: With dead ends: 260 [2021-10-16 02:22:04,694 INFO L226 Difference]: Without dead ends: 137 [2021-10-16 02:22:04,698 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:22:04,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-10-16 02:22:04,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2021-10-16 02:22:04,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.5149253731343284) internal successors, (203), 134 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:04,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 203 transitions. [2021-10-16 02:22:04,796 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 203 transitions. Word has length 21 [2021-10-16 02:22:04,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:22:04,796 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 203 transitions. [2021-10-16 02:22:04,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:04,797 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 203 transitions. [2021-10-16 02:22:04,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-16 02:22:04,799 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:22:04,816 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 02:22:04,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 02:22:04,817 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:22:04,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:22:04,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1930156978, now seen corresponding path program 1 times [2021-10-16 02:22:04,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:22:04,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967905885] [2021-10-16 02:22:04,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:22:04,819 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:22:04,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:22:04,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:22:04,971 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:22:04,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967905885] [2021-10-16 02:22:04,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967905885] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:22:04,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:22:04,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:22:04,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314648588] [2021-10-16 02:22:04,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:22:04,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:22:04,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:22:04,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:22:04,976 INFO L87 Difference]: Start difference. First operand 135 states and 203 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:05,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:22:05,137 INFO L93 Difference]: Finished difference Result 281 states and 421 transitions. [2021-10-16 02:22:05,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:22:05,140 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 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 02:22:05,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:22:05,147 INFO L225 Difference]: With dead ends: 281 [2021-10-16 02:22:05,147 INFO L226 Difference]: Without dead ends: 148 [2021-10-16 02:22:05,152 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:22:05,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-10-16 02:22:05,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 141. [2021-10-16 02:22:05,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.5071428571428571) internal successors, (211), 140 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:05,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 211 transitions. [2021-10-16 02:22:05,176 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 211 transitions. Word has length 26 [2021-10-16 02:22:05,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:22:05,176 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 211 transitions. [2021-10-16 02:22:05,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:05,177 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 211 transitions. [2021-10-16 02:22:05,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-16 02:22:05,179 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:22:05,180 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, 1, 1] [2021-10-16 02:22:05,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-16 02:22:05,181 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:22:05,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:22:05,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1395462774, now seen corresponding path program 1 times [2021-10-16 02:22:05,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:22:05,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343959233] [2021-10-16 02:22:05,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:22:05,194 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:22:05,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:22:05,281 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 02:22:05,282 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:22:05,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343959233] [2021-10-16 02:22:05,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343959233] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:22:05,286 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:22:05,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:22:05,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804872315] [2021-10-16 02:22:05,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:22:05,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:22:05,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:22:05,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:22:05,288 INFO L87 Difference]: Start difference. First operand 141 states and 211 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:05,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:22:05,482 INFO L93 Difference]: Finished difference Result 336 states and 515 transitions. [2021-10-16 02:22:05,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:22:05,482 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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 36 [2021-10-16 02:22:05,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:22:05,484 INFO L225 Difference]: With dead ends: 336 [2021-10-16 02:22:05,484 INFO L226 Difference]: Without dead ends: 185 [2021-10-16 02:22:05,487 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:22:05,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-10-16 02:22:05,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 180. [2021-10-16 02:22:05,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.4804469273743017) internal successors, (265), 179 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:05,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 265 transitions. [2021-10-16 02:22:05,514 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 265 transitions. Word has length 36 [2021-10-16 02:22:05,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:22:05,515 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 265 transitions. [2021-10-16 02:22:05,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:05,515 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 265 transitions. [2021-10-16 02:22:05,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-16 02:22:05,521 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:22:05,521 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-16 02:22:05,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-16 02:22:05,522 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:22:05,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:22:05,523 INFO L82 PathProgramCache]: Analyzing trace with hash -2043556667, now seen corresponding path program 1 times [2021-10-16 02:22:05,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:22:05,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140222272] [2021-10-16 02:22:05,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:22:05,524 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:22:05,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:22:05,594 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:22:05,594 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:22:05,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140222272] [2021-10-16 02:22:05,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140222272] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:22:05,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:22:05,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:22:05,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760681655] [2021-10-16 02:22:05,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:22:05,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:22:05,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:22:05,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:22:05,597 INFO L87 Difference]: Start difference. First operand 180 states and 265 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:05,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:22:05,761 INFO L93 Difference]: Finished difference Result 437 states and 658 transitions. [2021-10-16 02:22:05,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:22:05,762 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-16 02:22:05,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:22:05,764 INFO L225 Difference]: With dead ends: 437 [2021-10-16 02:22:05,764 INFO L226 Difference]: Without dead ends: 249 [2021-10-16 02:22:05,766 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:22:05,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-10-16 02:22:05,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 234. [2021-10-16 02:22:05,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.4592274678111588) internal successors, (340), 233 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:05,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 340 transitions. [2021-10-16 02:22:05,789 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 340 transitions. Word has length 38 [2021-10-16 02:22:05,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:22:05,791 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 340 transitions. [2021-10-16 02:22:05,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:05,792 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 340 transitions. [2021-10-16 02:22:05,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-10-16 02:22:05,797 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:22:05,797 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-16 02:22:05,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-16 02:22:05,798 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:22:05,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:22:05,799 INFO L82 PathProgramCache]: Analyzing trace with hash -102964074, now seen corresponding path program 1 times [2021-10-16 02:22:05,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:22:05,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854041523] [2021-10-16 02:22:05,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:22:05,800 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:22:05,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:22:05,902 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-16 02:22:05,902 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:22:05,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854041523] [2021-10-16 02:22:05,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854041523] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:22:05,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:22:05,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:22:05,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507767652] [2021-10-16 02:22:05,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:22:05,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:22:05,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:22:05,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:22:05,921 INFO L87 Difference]: Start difference. First operand 234 states and 340 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:06,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:22:06,025 INFO L93 Difference]: Finished difference Result 484 states and 704 transitions. [2021-10-16 02:22:06,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:22:06,026 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 54 [2021-10-16 02:22:06,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:22:06,028 INFO L225 Difference]: With dead ends: 484 [2021-10-16 02:22:06,028 INFO L226 Difference]: Without dead ends: 252 [2021-10-16 02:22:06,029 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 02:22:06,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-10-16 02:22:06,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 250. [2021-10-16 02:22:06,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 1.4457831325301205) internal successors, (360), 249 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:06,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 360 transitions. [2021-10-16 02:22:06,041 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 360 transitions. Word has length 54 [2021-10-16 02:22:06,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:22:06,043 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 360 transitions. [2021-10-16 02:22:06,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:06,043 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 360 transitions. [2021-10-16 02:22:06,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-10-16 02:22:06,044 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:22:06,044 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2021-10-16 02:22:06,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-16 02:22:06,045 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:22:06,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:22:06,046 INFO L82 PathProgramCache]: Analyzing trace with hash 819224845, now seen corresponding path program 1 times [2021-10-16 02:22:06,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:22:06,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547141852] [2021-10-16 02:22:06,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:22:06,051 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:22:06,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:22:06,144 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-16 02:22:06,144 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:22:06,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547141852] [2021-10-16 02:22:06,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547141852] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 02:22:06,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054155768] [2021-10-16 02:22:06,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:22:06,146 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:22:06,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:22:06,147 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:22:06,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 02:22:06,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:22:06,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:22:06,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:22:06,583 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-16 02:22:06,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:22:06,731 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-16 02:22:06,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054155768] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:22:06,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [270774319] [2021-10-16 02:22:06,759 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2021-10-16 02:22:06,759 INFO L166 IcfgInterpreter]: Building call graph [2021-10-16 02:22:06,766 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-16 02:22:06,776 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-16 02:22:06,777 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-16 02:22:07,438 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:22:07,449 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:22:07,450 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:22:07,450 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-16 02:22:07,454 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:22:07,456 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:22:07,457 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-16 02:22:07,485 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 386 [2021-10-16 02:22:07,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:22:07,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:22:07,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:22:07,653 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-10-16 02:22:07,654 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 02:22:07,655 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:22:07,660 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-16 02:22:07,661 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:22:07,662 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-16 02:22:07,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-16 02:22:07,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:22:07,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:22:07,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:22:07,774 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-10-16 02:22:07,774 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 02:22:07,775 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:22:07,783 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-16 02:22:07,784 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:22:07,786 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-16 02:22:07,787 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-16 02:22:07,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:22:07,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:22:07,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:22:07,878 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-10-16 02:22:07,878 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 02:22:07,880 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:22:07,883 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-16 02:22:07,884 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:22:07,885 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-16 02:22:07,886 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-10-16 02:22:07,888 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:22:08,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:22:08,161 INFO L180 QuantifierPusher]: treesize reduction 18, result has 98.3 percent of original size [2021-10-16 02:22:08,200 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1023 [2021-10-16 02:22:08,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-10-16 02:22:08,202 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:1089, output treesize:1023 [2021-10-16 02:22:08,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:22:08,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:22:08,418 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 02:22:08,422 INFO L168 Benchmark]: Toolchain (without parser) took 6568.70 ms. Allocated memory was 90.2 MB in the beginning and 167.8 MB in the end (delta: 77.6 MB). Free memory was 55.9 MB in the beginning and 66.8 MB in the end (delta: -11.0 MB). Peak memory consumption was 91.8 MB. Max. memory is 16.1 GB. [2021-10-16 02:22:08,422 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 90.2 MB. Free memory is still 54.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:22:08,423 INFO L168 Benchmark]: CACSL2BoogieTranslator took 402.18 ms. Allocated memory is still 90.2 MB. Free memory was 55.6 MB in the beginning and 39.8 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-16 02:22:08,423 INFO L168 Benchmark]: Boogie Procedure Inliner took 81.71 ms. Allocated memory was 90.2 MB in the beginning and 130.0 MB in the end (delta: 39.8 MB). Free memory was 39.8 MB in the beginning and 106.6 MB in the end (delta: -66.9 MB). Peak memory consumption was 5.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:22:08,424 INFO L168 Benchmark]: Boogie Preprocessor took 68.18 ms. Allocated memory is still 130.0 MB. Free memory was 106.6 MB in the beginning and 103.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:22:08,424 INFO L168 Benchmark]: RCFGBuilder took 1493.72 ms. Allocated memory is still 130.0 MB. Free memory was 103.9 MB in the beginning and 43.1 MB in the end (delta: 60.8 MB). Peak memory consumption was 60.8 MB. Max. memory is 16.1 GB. [2021-10-16 02:22:08,425 INFO L168 Benchmark]: TraceAbstraction took 4511.50 ms. Allocated memory was 130.0 MB in the beginning and 167.8 MB in the end (delta: 37.7 MB). Free memory was 42.5 MB in the beginning and 66.8 MB in the end (delta: -24.3 MB). Peak memory consumption was 36.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:22:08,428 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 90.2 MB. Free memory is still 54.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 402.18 ms. Allocated memory is still 90.2 MB. Free memory was 55.6 MB in the beginning and 39.8 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 81.71 ms. Allocated memory was 90.2 MB in the beginning and 130.0 MB in the end (delta: 39.8 MB). Free memory was 39.8 MB in the beginning and 106.6 MB in the end (delta: -66.9 MB). Peak memory consumption was 5.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 68.18 ms. Allocated memory is still 130.0 MB. Free memory was 106.6 MB in the beginning and 103.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1493.72 ms. Allocated memory is still 130.0 MB. Free memory was 103.9 MB in the beginning and 43.1 MB in the end (delta: 60.8 MB). Peak memory consumption was 60.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4511.50 ms. Allocated memory was 130.0 MB in the beginning and 167.8 MB in the end (delta: 37.7 MB). Free memory was 42.5 MB in the beginning and 66.8 MB in the end (delta: -24.3 MB). Peak memory consumption was 36.2 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 02:22:08,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:22:11,021 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:22:11,029 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:22:11,072 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:22:11,072 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:22:11,077 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:22:11,079 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:22:11,088 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:22:11,091 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:22:11,102 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:22:11,103 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:22:11,105 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:22:11,106 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:22:11,109 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:22:11,111 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:22:11,113 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:22:11,118 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:22:11,120 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:22:11,122 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:22:11,127 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:22:11,132 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:22:11,134 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:22:11,136 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:22:11,139 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:22:11,146 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:22:11,147 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:22:11,147 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:22:11,149 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:22:11,150 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:22:11,151 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:22:11,153 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:22:11,154 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:22:11,156 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:22:11,157 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:22:11,159 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:22:11,159 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:22:11,168 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:22:11,169 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:22:11,169 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:22:11,171 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:22:11,172 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:22:11,173 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-16 02:22:11,225 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:22:11,226 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:22:11,227 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:22:11,227 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:22:11,228 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:22:11,228 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:22:11,228 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:22:11,228 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:22:11,229 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:22:11,230 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:22:11,231 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:22:11,231 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:22:11,232 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:22:11,232 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:22:11,232 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:22:11,232 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:22:11,233 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:22:11,233 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 02:22:11,233 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 02:22:11,233 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:22:11,233 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:22:11,234 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:22:11,234 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:22:11,234 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:22:11,234 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 02:22:11,235 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:22:11,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:22:11,235 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:22:11,235 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:22:11,236 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:22:11,236 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 02:22:11,236 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 02:22:11,236 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:22:11,237 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:22:11,237 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:22:11,237 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_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 63398fb43fea7115c7e884d3b48ce08d551bf723 [2021-10-16 02:22:11,605 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:22:11,642 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:22:11,645 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:22:11,647 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:22:11,648 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:22:11,649 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/openssl-simplified/s3_srvr_12.cil.c [2021-10-16 02:22:11,738 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/data/56d89c658/85e865f8ce8d431282974e5afd47619f/FLAG18c65385a [2021-10-16 02:22:12,349 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:22:12,362 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/sv-benchmarks/c/openssl-simplified/s3_srvr_12.cil.c [2021-10-16 02:22:12,383 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/data/56d89c658/85e865f8ce8d431282974e5afd47619f/FLAG18c65385a [2021-10-16 02:22:12,638 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/data/56d89c658/85e865f8ce8d431282974e5afd47619f [2021-10-16 02:22:12,648 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:22:12,650 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:22:12,653 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:22:12,653 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:22:12,656 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:22:12,657 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:22:12" (1/1) ... [2021-10-16 02:22:12,660 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b59d838 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:22:12, skipping insertion in model container [2021-10-16 02:22:12,660 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:22:12" (1/1) ... [2021-10-16 02:22:12,700 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:22:12,761 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:22:12,990 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_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/sv-benchmarks/c/openssl-simplified/s3_srvr_12.cil.c[49672,49685] [2021-10-16 02:22:12,997 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:22:13,016 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:22:13,107 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_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/sv-benchmarks/c/openssl-simplified/s3_srvr_12.cil.c[49672,49685] [2021-10-16 02:22:13,111 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:22:13,129 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:22:13,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:22:13 WrapperNode [2021-10-16 02:22:13,130 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:22:13,132 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:22:13,132 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:22:13,132 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:22:13,139 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:22:13" (1/1) ... [2021-10-16 02:22:13,167 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:22:13" (1/1) ... [2021-10-16 02:22:13,229 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:22:13,232 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:22:13,233 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:22:13,233 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:22:13,241 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:22:13" (1/1) ... [2021-10-16 02:22:13,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:22:13" (1/1) ... [2021-10-16 02:22:13,259 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:22:13" (1/1) ... [2021-10-16 02:22:13,261 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:22:13" (1/1) ... [2021-10-16 02:22:13,272 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:22:13" (1/1) ... [2021-10-16 02:22:13,301 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:22:13" (1/1) ... [2021-10-16 02:22:13,311 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:22:13" (1/1) ... [2021-10-16 02:22:13,316 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:22:13,320 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:22:13,321 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:22:13,321 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:22:13,322 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:22:13" (1/1) ... [2021-10-16 02:22:13,328 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:22:13,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:22:13,353 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:22:13,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:22:13,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 02:22:13,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:22:13,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:22:13,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:22:13,568 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-10-16 02:22:14,228 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-10-16 02:22:14,229 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-10-16 02:22:14,244 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:22:14,244 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-16 02:22:14,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:22:14 BoogieIcfgContainer [2021-10-16 02:22:14,246 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:22:14,248 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:22:14,249 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:22:14,251 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:22:14,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:22:12" (1/3) ... [2021-10-16 02:22:14,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75377533 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:22:14, skipping insertion in model container [2021-10-16 02:22:14,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:22:13" (2/3) ... [2021-10-16 02:22:14,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75377533 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:22:14, skipping insertion in model container [2021-10-16 02:22:14,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:22:14" (3/3) ... [2021-10-16 02:22:14,255 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr_12.cil.c [2021-10-16 02:22:14,261 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:22:14,261 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:22:14,309 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:22:14,315 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-16 02:22:14,315 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 02:22:14,336 INFO L276 IsEmpty]: Start isEmpty. Operand has 167 states, 165 states have (on average 1.7636363636363637) internal successors, (291), 166 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:14,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-16 02:22:14,344 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:22:14,345 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] [2021-10-16 02:22:14,345 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:22:14,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:22:14,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1659372905, now seen corresponding path program 1 times [2021-10-16 02:22:14,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:22:14,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1311348894] [2021-10-16 02:22:14,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:22:14,365 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:22:14,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:22:14,368 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:22:14,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 02:22:14,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:22:14,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:22:14,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:22:14,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:22:14,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:22:14,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:22:14,825 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:22:14,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1311348894] [2021-10-16 02:22:14,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1311348894] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:22:14,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:22:14,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-16 02:22:14,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31839162] [2021-10-16 02:22:14,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:22:14,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:22:14,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:22:14,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:22:14,858 INFO L87 Difference]: Start difference. First operand has 167 states, 165 states have (on average 1.7636363636363637) internal successors, (291), 166 states have internal predecessors, (291), 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 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:15,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:22:15,201 INFO L93 Difference]: Finished difference Result 384 states and 665 transitions. [2021-10-16 02:22:15,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:22:15,203 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 28 [2021-10-16 02:22:15,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:22:15,219 INFO L225 Difference]: With dead ends: 384 [2021-10-16 02:22:15,220 INFO L226 Difference]: Without dead ends: 198 [2021-10-16 02:22:15,224 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:22:15,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-10-16 02:22:15,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 193. [2021-10-16 02:22:15,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.5833333333333333) internal successors, (304), 192 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:15,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 304 transitions. [2021-10-16 02:22:15,298 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 304 transitions. Word has length 28 [2021-10-16 02:22:15,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:22:15,299 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 304 transitions. [2021-10-16 02:22:15,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:15,299 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 304 transitions. [2021-10-16 02:22:15,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-16 02:22:15,301 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:22:15,302 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, 1, 1] [2021-10-16 02:22:15,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:22:15,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:22:15,519 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:22:15,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:22:15,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1439838815, now seen corresponding path program 1 times [2021-10-16 02:22:15,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:22:15,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1312237663] [2021-10-16 02:22:15,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:22:15,522 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:22:15,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:22:15,523 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:22:15,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 02:22:15,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:22:15,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:22:15,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:22:15,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:22:15,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:22:15,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:22:15,899 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:22:15,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1312237663] [2021-10-16 02:22:15,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1312237663] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:22:15,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:22:15,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-16 02:22:15,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700545964] [2021-10-16 02:22:15,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:22:15,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:22:15,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:22:15,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:22:15,908 INFO L87 Difference]: Start difference. First operand 193 states and 304 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:16,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:22:16,424 INFO L93 Difference]: Finished difference Result 628 states and 988 transitions. [2021-10-16 02:22:16,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-16 02:22:16,424 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-10-16 02:22:16,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:22:16,428 INFO L225 Difference]: With dead ends: 628 [2021-10-16 02:22:16,429 INFO L226 Difference]: Without dead ends: 443 [2021-10-16 02:22:16,430 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 42.7ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:22:16,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-10-16 02:22:16,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 388. [2021-10-16 02:22:16,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 1.5917312661498708) internal successors, (616), 387 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:16,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 616 transitions. [2021-10-16 02:22:16,484 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 616 transitions. Word has length 32 [2021-10-16 02:22:16,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:22:16,485 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 616 transitions. [2021-10-16 02:22:16,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:16,486 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 616 transitions. [2021-10-16 02:22:16,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-10-16 02:22:16,498 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:22:16,499 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 02:22:16,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:22:16,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:22:16,712 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:22:16,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:22:16,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1461079420, now seen corresponding path program 1 times [2021-10-16 02:22:16,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:22:16,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [271430816] [2021-10-16 02:22:16,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:22:16,714 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:22:16,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:22:16,721 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:22:16,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 02:22:16,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:22:16,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:22:16,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:22:16,971 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 02:22:16,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:22:17,106 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 02:22:17,106 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:22:17,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [271430816] [2021-10-16 02:22:17,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [271430816] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:22:17,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:22:17,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-16 02:22:17,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2404581] [2021-10-16 02:22:17,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:22:17,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:22:17,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:22:17,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:22:17,110 INFO L87 Difference]: Start difference. First operand 388 states and 616 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 02:22:17,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:22:17,271 INFO L93 Difference]: Finished difference Result 816 states and 1292 transitions. [2021-10-16 02:22:17,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:22:17,271 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 02:22:17,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:22:17,274 INFO L225 Difference]: With dead ends: 816 [2021-10-16 02:22:17,275 INFO L226 Difference]: Without dead ends: 424 [2021-10-16 02:22:17,285 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:22:17,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-10-16 02:22:17,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 416. [2021-10-16 02:22:17,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 1.5686746987951807) internal successors, (651), 415 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:17,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 651 transitions. [2021-10-16 02:22:17,336 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 651 transitions. Word has length 61 [2021-10-16 02:22:17,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:22:17,337 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 651 transitions. [2021-10-16 02:22:17,338 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 02:22:17,339 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 651 transitions. [2021-10-16 02:22:17,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-10-16 02:22:17,343 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:22:17,344 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 02:22:17,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-16 02:22:17,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:22:17,558 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:22:17,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:22:17,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1796993934, now seen corresponding path program 1 times [2021-10-16 02:22:17,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:22:17,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [935625346] [2021-10-16 02:22:17,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:22:17,560 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:22:17,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:22:17,561 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:22:17,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-16 02:22:17,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:22:17,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:22:17,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:22:17,900 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 02:22:17,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:22:18,147 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 02:22:18,147 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:22:18,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [935625346] [2021-10-16 02:22:18,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [935625346] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:22:18,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:22:18,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-16 02:22:18,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705596764] [2021-10-16 02:22:18,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:22:18,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:22:18,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:22:18,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:22:18,154 INFO L87 Difference]: Start difference. First operand 416 states and 651 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:18,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:22:18,434 INFO L93 Difference]: Finished difference Result 984 states and 1572 transitions. [2021-10-16 02:22:18,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:22:18,435 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 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 02:22:18,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:22:18,439 INFO L225 Difference]: With dead ends: 984 [2021-10-16 02:22:18,439 INFO L226 Difference]: Without dead ends: 576 [2021-10-16 02:22:18,440 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 162 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 02:22:18,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-10-16 02:22:18,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 544. [2021-10-16 02:22:18,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 543 states have (on average 1.565377532228361) internal successors, (850), 543 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:18,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 850 transitions. [2021-10-16 02:22:18,465 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 850 transitions. Word has length 83 [2021-10-16 02:22:18,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:22:18,466 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 850 transitions. [2021-10-16 02:22:18,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:18,466 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 850 transitions. [2021-10-16 02:22:18,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-10-16 02:22:18,468 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:22:18,468 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, 1] [2021-10-16 02:22:18,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-16 02:22:18,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:22:18,680 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:22:18,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:22:18,680 INFO L82 PathProgramCache]: Analyzing trace with hash -76250594, now seen corresponding path program 1 times [2021-10-16 02:22:18,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:22:18,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1452016219] [2021-10-16 02:22:18,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:22:18,681 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:22:18,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:22:18,683 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:22:18,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-16 02:22:18,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:22:18,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:22:18,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:22:19,096 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 02:22:19,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:22:19,284 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 02:22:19,284 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:22:19,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1452016219] [2021-10-16 02:22:19,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1452016219] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:22:19,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:22:19,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-16 02:22:19,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206307053] [2021-10-16 02:22:19,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:22:19,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:22:19,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:22:19,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:22:19,289 INFO L87 Difference]: Start difference. First operand 544 states and 850 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 02:22:19,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:22:19,440 INFO L93 Difference]: Finished difference Result 1120 states and 1754 transitions. [2021-10-16 02:22:19,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:22:19,441 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 84 [2021-10-16 02:22:19,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:22:19,448 INFO L225 Difference]: With dead ends: 1120 [2021-10-16 02:22:19,449 INFO L226 Difference]: Without dead ends: 584 [2021-10-16 02:22:19,450 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 165 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 02:22:19,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-10-16 02:22:19,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 574. [2021-10-16 02:22:19,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 573 states have (on average 1.549738219895288) internal successors, (888), 573 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:19,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 888 transitions. [2021-10-16 02:22:19,475 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 888 transitions. Word has length 84 [2021-10-16 02:22:19,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:22:19,475 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 888 transitions. [2021-10-16 02:22:19,476 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 02:22:19,476 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 888 transitions. [2021-10-16 02:22:19,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-10-16 02:22:19,478 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:22:19,478 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, 1] [2021-10-16 02:22:19,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-16 02:22:19,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:22:19,689 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:22:19,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:22:19,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1056402554, now seen corresponding path program 1 times [2021-10-16 02:22:19,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:22:19,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1012499944] [2021-10-16 02:22:19,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:22:19,691 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:22:19,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:22:19,692 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:22:19,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-16 02:22:19,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:22:19,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:22:19,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:22:20,164 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 02:22:20,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:22:20,375 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 02:22:20,376 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:22:20,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1012499944] [2021-10-16 02:22:20,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1012499944] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:22:20,377 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:22:20,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-16 02:22:20,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680144071] [2021-10-16 02:22:20,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:22:20,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:22:20,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:22:20,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:22:20,380 INFO L87 Difference]: Start difference. First operand 574 states and 888 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:20,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:22:20,528 INFO L93 Difference]: Finished difference Result 1200 states and 1866 transitions. [2021-10-16 02:22:20,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:22:20,529 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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 106 [2021-10-16 02:22:20,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:22:20,533 INFO L225 Difference]: With dead ends: 1200 [2021-10-16 02:22:20,533 INFO L226 Difference]: Without dead ends: 634 [2021-10-16 02:22:20,534 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 209 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 02:22:20,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-10-16 02:22:20,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 606. [2021-10-16 02:22:20,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 1.5338842975206612) internal successors, (928), 605 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:20,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 928 transitions. [2021-10-16 02:22:20,568 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 928 transitions. Word has length 106 [2021-10-16 02:22:20,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:22:20,568 INFO L470 AbstractCegarLoop]: Abstraction has 606 states and 928 transitions. [2021-10-16 02:22:20,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:20,569 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 928 transitions. [2021-10-16 02:22:20,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-10-16 02:22:20,571 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:22:20,571 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, 1, 1, 1, 1, 1, 1, 1, 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 02:22:20,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-16 02:22:20,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:22:20,783 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:22:20,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:22:20,784 INFO L82 PathProgramCache]: Analyzing trace with hash 284446028, now seen corresponding path program 1 times [2021-10-16 02:22:20,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:22:20,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1090612473] [2021-10-16 02:22:20,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:22:20,785 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:22:20,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:22:20,786 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:22:20,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-16 02:22:21,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:22:21,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:22:21,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:22:21,306 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-16 02:22:21,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:22:21,610 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-16 02:22:21,611 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:22:21,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1090612473] [2021-10-16 02:22:21,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1090612473] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:22:21,611 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:22:21,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-16 02:22:21,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585625750] [2021-10-16 02:22:21,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:22:21,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:22:21,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:22:21,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:22:21,613 INFO L87 Difference]: Start difference. First operand 606 states and 928 transitions. Second operand has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:21,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:22:21,843 INFO L93 Difference]: Finished difference Result 2388 states and 3658 transitions. [2021-10-16 02:22:21,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:22:21,843 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 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 02:22:21,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:22:21,854 INFO L225 Difference]: With dead ends: 2388 [2021-10-16 02:22:21,855 INFO L226 Difference]: Without dead ends: 1790 [2021-10-16 02:22:21,856 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:22:21,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2021-10-16 02:22:21,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1786. [2021-10-16 02:22:21,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1786 states, 1785 states have (on average 1.5081232492997199) internal successors, (2692), 1785 states have internal predecessors, (2692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:21,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1786 states to 1786 states and 2692 transitions. [2021-10-16 02:22:21,930 INFO L78 Accepts]: Start accepts. Automaton has 1786 states and 2692 transitions. Word has length 125 [2021-10-16 02:22:21,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:22:21,931 INFO L470 AbstractCegarLoop]: Abstraction has 1786 states and 2692 transitions. [2021-10-16 02:22:21,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:21,931 INFO L276 IsEmpty]: Start isEmpty. Operand 1786 states and 2692 transitions. [2021-10-16 02:22:21,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-10-16 02:22:21,934 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:22:21,935 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:22:21,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-16 02:22:22,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:22:22,150 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:22:22,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:22:22,150 INFO L82 PathProgramCache]: Analyzing trace with hash -224825765, now seen corresponding path program 1 times [2021-10-16 02:22:22,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:22:22,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [836966269] [2021-10-16 02:22:22,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:22:22,151 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:22:22,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:22:22,152 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:22:22,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-16 02:22:22,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:22:22,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:22:22,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:22:22,725 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-10-16 02:22:22,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:22:23,050 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-10-16 02:22:23,050 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:22:23,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [836966269] [2021-10-16 02:22:23,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [836966269] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:22:23,050 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:22:23,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-16 02:22:23,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676527164] [2021-10-16 02:22:23,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:22:23,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:22:23,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:22:23,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:22:23,052 INFO L87 Difference]: Start difference. First operand 1786 states and 2692 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:23,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:22:23,173 INFO L93 Difference]: Finished difference Result 3605 states and 5426 transitions. [2021-10-16 02:22:23,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:22:23,174 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 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 126 [2021-10-16 02:22:23,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:22:23,185 INFO L225 Difference]: With dead ends: 3605 [2021-10-16 02:22:23,185 INFO L226 Difference]: Without dead ends: 1827 [2021-10-16 02:22:23,189 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 249 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 02:22:23,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1827 states. [2021-10-16 02:22:23,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1827 to 1827. [2021-10-16 02:22:23,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1827 states, 1826 states have (on average 1.5032858707557504) internal successors, (2745), 1826 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:23,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1827 states to 1827 states and 2745 transitions. [2021-10-16 02:22:23,265 INFO L78 Accepts]: Start accepts. Automaton has 1827 states and 2745 transitions. Word has length 126 [2021-10-16 02:22:23,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:22:23,265 INFO L470 AbstractCegarLoop]: Abstraction has 1827 states and 2745 transitions. [2021-10-16 02:22:23,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:23,266 INFO L276 IsEmpty]: Start isEmpty. Operand 1827 states and 2745 transitions. [2021-10-16 02:22:23,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-10-16 02:22:23,269 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:22:23,269 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:22:23,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-16 02:22:23,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:22:23,485 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:22:23,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:22:23,486 INFO L82 PathProgramCache]: Analyzing trace with hash 2096976153, now seen corresponding path program 1 times [2021-10-16 02:22:23,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:22:23,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [338145109] [2021-10-16 02:22:23,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:22:23,487 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:22:23,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:22:23,488 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:22:23,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-16 02:22:23,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:22:23,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:22:23,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:22:24,108 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-10-16 02:22:24,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:22:24,432 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-10-16 02:22:24,432 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:22:24,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [338145109] [2021-10-16 02:22:24,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [338145109] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:22:24,432 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:22:24,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-16 02:22:24,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432273460] [2021-10-16 02:22:24,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:22:24,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:22:24,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:22:24,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:22:24,434 INFO L87 Difference]: Start difference. First operand 1827 states and 2745 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:24,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:22:24,560 INFO L93 Difference]: Finished difference Result 3659 states and 5492 transitions. [2021-10-16 02:22:24,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:22:24,561 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 126 [2021-10-16 02:22:24,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:22:24,572 INFO L225 Difference]: With dead ends: 3659 [2021-10-16 02:22:24,572 INFO L226 Difference]: Without dead ends: 1840 [2021-10-16 02:22:24,577 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 249 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 02:22:24,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1840 states. [2021-10-16 02:22:24,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1840 to 1840. [2021-10-16 02:22:24,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1840 states, 1839 states have (on average 1.4997281131049482) internal successors, (2758), 1839 states have internal predecessors, (2758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:24,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1840 states to 1840 states and 2758 transitions. [2021-10-16 02:22:24,674 INFO L78 Accepts]: Start accepts. Automaton has 1840 states and 2758 transitions. Word has length 126 [2021-10-16 02:22:24,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:22:24,674 INFO L470 AbstractCegarLoop]: Abstraction has 1840 states and 2758 transitions. [2021-10-16 02:22:24,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:24,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1840 states and 2758 transitions. [2021-10-16 02:22:24,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-10-16 02:22:24,678 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:22:24,679 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 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] [2021-10-16 02:22:24,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-16 02:22:24,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:22:24,891 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:22:24,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:22:24,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1169030060, now seen corresponding path program 1 times [2021-10-16 02:22:24,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:22:24,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [122026796] [2021-10-16 02:22:24,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:22:24,893 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:22:24,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:22:24,893 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:22:24,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-16 02:22:25,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:22:25,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:22:25,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:22:25,545 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-10-16 02:22:25,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:22:25,828 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-10-16 02:22:25,829 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:22:25,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [122026796] [2021-10-16 02:22:25,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [122026796] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:22:25,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:22:25,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-16 02:22:25,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440402186] [2021-10-16 02:22:25,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:22:25,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:22:25,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:22:25,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:22:25,831 INFO L87 Difference]: Start difference. First operand 1840 states and 2758 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:25,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:22:25,988 INFO L93 Difference]: Finished difference Result 7207 states and 10789 transitions. [2021-10-16 02:22:25,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:22:25,988 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 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 02:22:26,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:22:26,041 INFO L225 Difference]: With dead ends: 7207 [2021-10-16 02:22:26,042 INFO L226 Difference]: Without dead ends: 5388 [2021-10-16 02:22:26,045 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:22:26,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5388 states. [2021-10-16 02:22:26,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5388 to 1846. [2021-10-16 02:22:26,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1846 states, 1845 states have (on average 1.4981029810298103) internal successors, (2764), 1845 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:26,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1846 states to 1846 states and 2764 transitions. [2021-10-16 02:22:26,168 INFO L78 Accepts]: Start accepts. Automaton has 1846 states and 2764 transitions. Word has length 135 [2021-10-16 02:22:26,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:22:26,169 INFO L470 AbstractCegarLoop]: Abstraction has 1846 states and 2764 transitions. [2021-10-16 02:22:26,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:26,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1846 states and 2764 transitions. [2021-10-16 02:22:26,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-10-16 02:22:26,172 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:22:26,173 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 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] [2021-10-16 02:22:26,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-16 02:22:26,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:22:26,385 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:22:26,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:22:26,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1522118442, now seen corresponding path program 1 times [2021-10-16 02:22:26,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:22:26,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1988790205] [2021-10-16 02:22:26,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:22:26,387 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:22:26,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:22:26,388 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:22:26,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-16 02:22:26,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:22:26,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:22:26,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:22:27,128 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-10-16 02:22:27,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:22:27,405 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-10-16 02:22:27,405 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:22:27,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1988790205] [2021-10-16 02:22:27,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1988790205] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:22:27,406 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:22:27,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-16 02:22:27,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419953016] [2021-10-16 02:22:27,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:22:27,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:22:27,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:22:27,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:22:27,407 INFO L87 Difference]: Start difference. First operand 1846 states and 2764 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:27,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:22:27,560 INFO L93 Difference]: Finished difference Result 5436 states and 8134 transitions. [2021-10-16 02:22:27,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:22:27,561 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 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 02:22:27,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:22:27,582 INFO L225 Difference]: With dead ends: 5436 [2021-10-16 02:22:27,582 INFO L226 Difference]: Without dead ends: 3611 [2021-10-16 02:22:27,585 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:22:27,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3611 states. [2021-10-16 02:22:27,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3611 to 1846. [2021-10-16 02:22:27,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1846 states, 1845 states have (on average 1.4948509485094852) internal successors, (2758), 1845 states have internal predecessors, (2758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:27,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1846 states to 1846 states and 2758 transitions. [2021-10-16 02:22:27,709 INFO L78 Accepts]: Start accepts. Automaton has 1846 states and 2758 transitions. Word has length 135 [2021-10-16 02:22:27,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:22:27,709 INFO L470 AbstractCegarLoop]: Abstraction has 1846 states and 2758 transitions. [2021-10-16 02:22:27,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:27,710 INFO L276 IsEmpty]: Start isEmpty. Operand 1846 states and 2758 transitions. [2021-10-16 02:22:27,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-10-16 02:22:27,713 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:22:27,714 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:22:27,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-16 02:22:27,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:22:27,926 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:22:27,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:22:27,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1174597455, now seen corresponding path program 1 times [2021-10-16 02:22:27,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:22:27,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1621298342] [2021-10-16 02:22:27,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:22:27,928 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:22:27,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:22:27,929 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:22:27,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-16 02:22:28,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:22:28,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:22:28,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:22:28,677 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-10-16 02:22:28,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:22:28,956 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-10-16 02:22:28,956 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:22:28,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1621298342] [2021-10-16 02:22:28,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1621298342] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:22:28,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:22:28,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-16 02:22:28,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313903151] [2021-10-16 02:22:28,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:22:28,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:22:28,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:22:28,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:22:28,961 INFO L87 Difference]: Start difference. First operand 1846 states and 2758 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:29,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:22:29,324 INFO L93 Difference]: Finished difference Result 3997 states and 6059 transitions. [2021-10-16 02:22:29,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:22:29,325 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 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 136 [2021-10-16 02:22:29,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:22:29,338 INFO L225 Difference]: With dead ends: 3997 [2021-10-16 02:22:29,338 INFO L226 Difference]: Without dead ends: 2172 [2021-10-16 02:22:29,341 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 268 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 02:22:29,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-10-16 02:22:29,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 2082. [2021-10-16 02:22:29,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2082 states, 2081 states have (on average 1.4968765016818837) internal successors, (3115), 2081 states have internal predecessors, (3115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:29,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2082 states to 2082 states and 3115 transitions. [2021-10-16 02:22:29,454 INFO L78 Accepts]: Start accepts. Automaton has 2082 states and 3115 transitions. Word has length 136 [2021-10-16 02:22:29,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:22:29,455 INFO L470 AbstractCegarLoop]: Abstraction has 2082 states and 3115 transitions. [2021-10-16 02:22:29,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:29,456 INFO L276 IsEmpty]: Start isEmpty. Operand 2082 states and 3115 transitions. [2021-10-16 02:22:29,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-10-16 02:22:29,459 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:22:29,460 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 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] [2021-10-16 02:22:29,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-16 02:22:29,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:22:29,673 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:22:29,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:22:29,674 INFO L82 PathProgramCache]: Analyzing trace with hash 303991039, now seen corresponding path program 1 times [2021-10-16 02:22:29,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:22:29,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1816967164] [2021-10-16 02:22:29,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:22:29,675 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:22:29,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:22:29,676 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:22:29,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-16 02:22:30,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:22:30,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:22:30,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:22:30,581 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-10-16 02:22:30,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:22:30,844 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-10-16 02:22:30,844 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:22:30,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1816967164] [2021-10-16 02:22:30,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1816967164] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:22:30,844 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:22:30,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-16 02:22:30,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634114923] [2021-10-16 02:22:30,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:22:30,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:22:30,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:22:30,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:22:30,846 INFO L87 Difference]: Start difference. First operand 2082 states and 3115 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:31,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:22:31,086 INFO L93 Difference]: Finished difference Result 4197 states and 6293 transitions. [2021-10-16 02:22:31,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:22:31,086 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 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 136 [2021-10-16 02:22:31,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:22:31,098 INFO L225 Difference]: With dead ends: 4197 [2021-10-16 02:22:31,099 INFO L226 Difference]: Without dead ends: 2136 [2021-10-16 02:22:31,101 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 269 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 02:22:31,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2136 states. [2021-10-16 02:22:31,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2136 to 2082. [2021-10-16 02:22:31,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2082 states, 2081 states have (on average 1.470927438731379) internal successors, (3061), 2081 states have internal predecessors, (3061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:31,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2082 states to 2082 states and 3061 transitions. [2021-10-16 02:22:31,194 INFO L78 Accepts]: Start accepts. Automaton has 2082 states and 3061 transitions. Word has length 136 [2021-10-16 02:22:31,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:22:31,194 INFO L470 AbstractCegarLoop]: Abstraction has 2082 states and 3061 transitions. [2021-10-16 02:22:31,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:31,195 INFO L276 IsEmpty]: Start isEmpty. Operand 2082 states and 3061 transitions. [2021-10-16 02:22:31,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-10-16 02:22:31,198 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:22:31,198 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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] [2021-10-16 02:22:31,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-16 02:22:31,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:22:31,412 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:22:31,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:22:31,412 INFO L82 PathProgramCache]: Analyzing trace with hash 286710936, now seen corresponding path program 1 times [2021-10-16 02:22:31,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:22:31,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2017964200] [2021-10-16 02:22:31,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:22:31,414 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:22:31,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:22:31,415 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:22:31,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-16 02:22:32,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:22:32,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:22:32,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:22:32,388 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-10-16 02:22:32,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:22:32,637 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-10-16 02:22:32,637 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:22:32,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2017964200] [2021-10-16 02:22:32,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2017964200] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:22:32,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:22:32,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-16 02:22:32,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179191589] [2021-10-16 02:22:32,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:22:32,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:22:32,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:22:32,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:22:32,639 INFO L87 Difference]: Start difference. First operand 2082 states and 3061 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:32,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:22:32,930 INFO L93 Difference]: Finished difference Result 4245 states and 6244 transitions. [2021-10-16 02:22:32,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:22:32,931 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 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 142 [2021-10-16 02:22:32,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:22:32,942 INFO L225 Difference]: With dead ends: 4245 [2021-10-16 02:22:32,942 INFO L226 Difference]: Without dead ends: 2115 [2021-10-16 02:22:32,946 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:22:32,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2115 states. [2021-10-16 02:22:33,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2115 to 2109. [2021-10-16 02:22:33,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2109 states, 2108 states have (on average 1.4264705882352942) internal successors, (3007), 2108 states have internal predecessors, (3007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:33,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2109 states to 2109 states and 3007 transitions. [2021-10-16 02:22:33,050 INFO L78 Accepts]: Start accepts. Automaton has 2109 states and 3007 transitions. Word has length 142 [2021-10-16 02:22:33,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:22:33,051 INFO L470 AbstractCegarLoop]: Abstraction has 2109 states and 3007 transitions. [2021-10-16 02:22:33,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:33,051 INFO L276 IsEmpty]: Start isEmpty. Operand 2109 states and 3007 transitions. [2021-10-16 02:22:33,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-10-16 02:22:33,054 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:22:33,055 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 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] [2021-10-16 02:22:33,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-16 02:22:33,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:22:33,268 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:22:33,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:22:33,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1860845909, now seen corresponding path program 1 times [2021-10-16 02:22:33,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:22:33,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1419627752] [2021-10-16 02:22:33,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:22:33,269 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:22:33,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:22:33,270 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:22:33,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-16 02:22:34,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:22:34,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:22:34,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:22:34,453 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2021-10-16 02:22:34,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:22:34,752 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2021-10-16 02:22:34,753 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:22:34,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1419627752] [2021-10-16 02:22:34,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1419627752] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:22:34,753 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:22:34,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-16 02:22:34,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246872112] [2021-10-16 02:22:34,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:22:34,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:22:34,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:22:34,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:22:34,755 INFO L87 Difference]: Start difference. First operand 2109 states and 3007 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 02:22:34,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:22:34,916 INFO L93 Difference]: Finished difference Result 6222 states and 8866 transitions. [2021-10-16 02:22:34,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:22:34,917 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 155 [2021-10-16 02:22:34,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:22:34,944 INFO L225 Difference]: With dead ends: 6222 [2021-10-16 02:22:34,946 INFO L226 Difference]: Without dead ends: 4134 [2021-10-16 02:22:34,967 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:22:34,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4134 states. [2021-10-16 02:22:35,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4134 to 4132. [2021-10-16 02:22:35,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4132 states, 4131 states have (on average 1.4219317356572259) internal successors, (5874), 4131 states have internal predecessors, (5874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:22:35,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4132 states to 4132 states and 5874 transitions. [2021-10-16 02:22:35,159 INFO L78 Accepts]: Start accepts. Automaton has 4132 states and 5874 transitions. Word has length 155 [2021-10-16 02:22:35,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:22:35,160 INFO L470 AbstractCegarLoop]: Abstraction has 4132 states and 5874 transitions. [2021-10-16 02:22:35,160 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 02:22:35,160 INFO L276 IsEmpty]: Start isEmpty. Operand 4132 states and 5874 transitions. [2021-10-16 02:22:35,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-10-16 02:22:35,164 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:22:35,164 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 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] [2021-10-16 02:22:35,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-16 02:22:35,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:22:35,378 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:22:35,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:22:35,378 INFO L82 PathProgramCache]: Analyzing trace with hash -3753809, now seen corresponding path program 1 times [2021-10-16 02:22:35,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:22:35,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1033653854] [2021-10-16 02:22:35,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:22:35,379 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:22:35,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:22:35,381 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:22:35,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-16 02:22:36,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 02:22:36,196 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-16 02:22:36,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 02:22:36,615 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-16 02:22:36,615 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-16 02:22:36,616 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:22:36,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-16 02:22:36,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:22:36,837 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 02:22:37,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:22:37 BoogieIcfgContainer [2021-10-16 02:22:37,020 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 02:22:37,021 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 02:22:37,021 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 02:22:37,021 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 02:22:37,022 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:22:14" (3/4) ... [2021-10-16 02:22:37,023 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-16 02:22:37,141 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/witness.graphml [2021-10-16 02:22:37,141 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 02:22:37,143 INFO L168 Benchmark]: Toolchain (without parser) took 24491.85 ms. Allocated memory was 77.6 MB in the beginning and 234.9 MB in the end (delta: 157.3 MB). Free memory was 42.0 MB in the beginning and 106.0 MB in the end (delta: -64.0 MB). Peak memory consumption was 94.8 MB. Max. memory is 16.1 GB. [2021-10-16 02:22:37,144 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 77.6 MB. Free memory was 58.8 MB in the beginning and 58.8 MB in the end (delta: 66.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:22:37,144 INFO L168 Benchmark]: CACSL2BoogieTranslator took 478.14 ms. Allocated memory is still 77.6 MB. Free memory was 41.8 MB in the beginning and 57.9 MB in the end (delta: -16.1 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-16 02:22:37,145 INFO L168 Benchmark]: Boogie Procedure Inliner took 99.80 ms. Allocated memory is still 77.6 MB. Free memory was 57.9 MB in the beginning and 55.1 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:22:37,145 INFO L168 Benchmark]: Boogie Preprocessor took 86.76 ms. Allocated memory is still 77.6 MB. Free memory was 55.1 MB in the beginning and 52.7 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:22:37,146 INFO L168 Benchmark]: RCFGBuilder took 926.81 ms. Allocated memory is still 77.6 MB. Free memory was 52.5 MB in the beginning and 48.3 MB in the end (delta: 4.2 MB). Peak memory consumption was 23.8 MB. Max. memory is 16.1 GB. [2021-10-16 02:22:37,146 INFO L168 Benchmark]: TraceAbstraction took 22772.08 ms. Allocated memory was 77.6 MB in the beginning and 234.9 MB in the end (delta: 157.3 MB). Free memory was 47.6 MB in the beginning and 120.7 MB in the end (delta: -73.0 MB). Peak memory consumption was 83.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:22:37,147 INFO L168 Benchmark]: Witness Printer took 120.42 ms. Allocated memory is still 234.9 MB. Free memory was 120.7 MB in the beginning and 106.0 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-16 02:22:37,149 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 77.6 MB. Free memory was 58.8 MB in the beginning and 58.8 MB in the end (delta: 66.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 478.14 ms. Allocated memory is still 77.6 MB. Free memory was 41.8 MB in the beginning and 57.9 MB in the end (delta: -16.1 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 99.80 ms. Allocated memory is still 77.6 MB. Free memory was 57.9 MB in the beginning and 55.1 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 86.76 ms. Allocated memory is still 77.6 MB. Free memory was 55.1 MB in the beginning and 52.7 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 926.81 ms. Allocated memory is still 77.6 MB. Free memory was 52.5 MB in the beginning and 48.3 MB in the end (delta: 4.2 MB). Peak memory consumption was 23.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 22772.08 ms. Allocated memory was 77.6 MB in the beginning and 234.9 MB in the end (delta: 157.3 MB). Free memory was 47.6 MB in the beginning and 120.7 MB in the end (delta: -73.0 MB). Peak memory consumption was 83.5 MB. Max. memory is 16.1 GB. * Witness Printer took 120.42 ms. Allocated memory is still 234.9 MB. Free memory was 120.7 MB in the beginning and 106.0 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 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: 709]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L714] int s ; [L715] int tmp ; [L719] 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 ; [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 ; [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 ; [L80] unsigned long __cil_tmp59 ; [L81] int __cil_tmp60 ; [L82] unsigned long __cil_tmp61 = __VERIFIER_nondet_ulong() ; [L86] s__state = initial_state [L87] blastFlag = 0 [L88] tmp = __VERIFIER_nondet_int() [L89] Time = tmp [L90] cb = 0 [L91] ret = -1 [L92] skip = 0 [L93] got_new_session = 0 [L94] COND TRUE s__info_callback != 0 [L95] cb = s__info_callback [L101] s__in_handshake ++ [L102] COND FALSE !(tmp___1 + 12288) [L107] COND FALSE !(s__cert == 0) [L111] COND TRUE 1 [L113] state = s__state [L114] COND FALSE !(s__state == 12292) [L117] COND FALSE !(s__state == 16384) [L120] COND FALSE !(s__state == 8192) [L123] COND FALSE !(s__state == 24576) [L126] COND FALSE !(s__state == 8195) [L129] COND FALSE !(s__state == 8480) [L132] COND FALSE !(s__state == 8481) [L135] COND FALSE !(s__state == 8482) [L138] COND TRUE s__state == 8464 [L284] s__shutdown = 0 [L285] ret = __VERIFIER_nondet_int() [L286] COND TRUE blastFlag == 0 [L287] blastFlag = 1 [L289] COND FALSE !(ret <= 0) [L292] got_new_session = 1 [L293] s__state = 8496 [L294] s__init_num = 0 [L663] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L664] COND FALSE !(! s__s3__tmp__reuse_message) [L698] skip = 0 [L111] COND TRUE 1 [L113] state = s__state [L114] COND FALSE !(s__state == 12292) [L117] COND FALSE !(s__state == 16384) [L120] COND FALSE !(s__state == 8192) [L123] COND FALSE !(s__state == 24576) [L126] COND FALSE !(s__state == 8195) [L129] COND FALSE !(s__state == 8480) [L132] COND FALSE !(s__state == 8481) [L135] COND FALSE !(s__state == 8482) [L138] COND FALSE !(s__state == 8464) [L141] COND FALSE !(s__state == 8465) [L144] COND FALSE !(s__state == 8466) [L147] COND TRUE s__state == 8496 [L298] ret = __VERIFIER_nondet_int() [L299] COND TRUE blastFlag == 1 [L300] blastFlag = 2 [L302] COND FALSE !(ret <= 0) [L305] COND FALSE !(\read(s__hit)) [L308] s__state = 8512 [L310] s__init_num = 0 [L663] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L664] COND FALSE !(! s__s3__tmp__reuse_message) [L698] skip = 0 [L111] COND TRUE 1 [L113] state = s__state [L114] COND FALSE !(s__state == 12292) [L117] COND FALSE !(s__state == 16384) [L120] COND FALSE !(s__state == 8192) [L123] COND FALSE !(s__state == 24576) [L126] COND FALSE !(s__state == 8195) [L129] COND FALSE !(s__state == 8480) [L132] COND FALSE !(s__state == 8481) [L135] COND FALSE !(s__state == 8482) [L138] COND FALSE !(s__state == 8464) [L141] COND FALSE !(s__state == 8465) [L144] COND FALSE !(s__state == 8466) [L147] COND FALSE !(s__state == 8496) [L150] COND FALSE !(s__state == 8497) [L153] COND TRUE s__state == 8512 [L315] s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int() [L316] __cil_tmp56 = (unsigned long )s__s3__tmp__new_cipher__algorithms [L317] COND TRUE __cil_tmp56 + 256UL [L318] __cil_tmp56 = 256345 [L319] skip = 1 [L330] s__state = 8528 [L331] s__init_num = 0 [L663] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L664] COND FALSE !(! s__s3__tmp__reuse_message) [L698] skip = 0 [L111] COND TRUE 1 [L113] state = s__state [L114] COND FALSE !(s__state == 12292) [L117] COND FALSE !(s__state == 16384) [L120] COND FALSE !(s__state == 8192) [L123] COND FALSE !(s__state == 24576) [L126] COND FALSE !(s__state == 8195) [L129] COND FALSE !(s__state == 8480) [L132] COND FALSE !(s__state == 8481) [L135] COND FALSE !(s__state == 8482) [L138] COND FALSE !(s__state == 8464) [L141] COND FALSE !(s__state == 8465) [L144] COND FALSE !(s__state == 8466) [L147] COND FALSE !(s__state == 8496) [L150] COND FALSE !(s__state == 8497) [L153] COND FALSE !(s__state == 8512) [L156] COND FALSE !(s__state == 8513) [L159] COND TRUE s__state == 8528 [L335] s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int() [L336] l = (unsigned long )s__s3__tmp__new_cipher__algorithms [L338] __cil_tmp57 = (unsigned long )s__options [L339] COND TRUE __cil_tmp57 + 2097152UL [L340] s__s3__tmp__use_rsa_tmp = 1 [L345] COND TRUE \read(s__s3__tmp__use_rsa_tmp) [L373] ret = __VERIFIER_nondet_int() [L374] COND FALSE !(blastFlag == 3) [L377] COND FALSE !(ret <= 0) [L394] s__state = 8544 [L395] s__init_num = 0 [L663] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L664] COND FALSE !(! s__s3__tmp__reuse_message) [L698] skip = 0 [L111] COND TRUE 1 [L113] state = s__state [L114] COND FALSE !(s__state == 12292) [L117] COND FALSE !(s__state == 16384) [L120] COND FALSE !(s__state == 8192) [L123] COND FALSE !(s__state == 24576) [L126] COND FALSE !(s__state == 8195) [L129] COND FALSE !(s__state == 8480) [L132] COND FALSE !(s__state == 8481) [L135] COND FALSE !(s__state == 8482) [L138] COND FALSE !(s__state == 8464) [L141] COND FALSE !(s__state == 8465) [L144] COND FALSE !(s__state == 8466) [L147] COND FALSE !(s__state == 8496) [L150] COND FALSE !(s__state == 8497) [L153] COND FALSE !(s__state == 8512) [L156] COND FALSE !(s__state == 8513) [L159] COND FALSE !(s__state == 8528) [L162] COND FALSE !(s__state == 8529) [L165] COND TRUE s__state == 8544 [L399] COND TRUE s__verify_mode + 1 [L400] COND TRUE s__session__peer != 0 [L401] COND TRUE s__verify_mode + 4 [L402] s__verify_mode = 123 [L403] skip = 1 [L404] s__s3__tmp__cert_request = 0 [L405] s__state = 8560 [L663] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L664] COND FALSE !(! s__s3__tmp__reuse_message) [L698] skip = 0 [L111] COND TRUE 1 [L113] state = s__state [L114] COND FALSE !(s__state == 12292) [L117] COND FALSE !(s__state == 16384) [L120] COND FALSE !(s__state == 8192) [L123] COND FALSE !(s__state == 24576) [L126] COND FALSE !(s__state == 8195) [L129] COND FALSE !(s__state == 8480) [L132] COND FALSE !(s__state == 8481) [L135] COND FALSE !(s__state == 8482) [L138] COND FALSE !(s__state == 8464) [L141] COND FALSE !(s__state == 8465) [L144] COND FALSE !(s__state == 8466) [L147] COND FALSE !(s__state == 8496) [L150] COND FALSE !(s__state == 8497) [L153] COND FALSE !(s__state == 8512) [L156] COND FALSE !(s__state == 8513) [L159] COND FALSE !(s__state == 8528) [L162] COND FALSE !(s__state == 8529) [L165] COND FALSE !(s__state == 8544) [L168] COND FALSE !(s__state == 8545) [L171] COND TRUE s__state == 8560 [L449] ret = __VERIFIER_nondet_int() [L450] COND FALSE !(ret <= 0) [L453] s__s3__tmp__next_state___0 = 8576 [L454] s__state = 8448 [L455] s__init_num = 0 [L663] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L664] COND TRUE ! s__s3__tmp__reuse_message [L665] COND TRUE ! skip [L666] COND TRUE state == 8560 [L667] COND TRUE s__state == 8448 [L668] COND TRUE s__verify_mode != -1 [L669] COND TRUE s__verify_mode != -2 [L670] COND TRUE __cil_tmp61 != 9021 [L671] COND TRUE __cil_tmp58 != 4294967294 [L672] COND TRUE blastFlag != 4 [L673] COND TRUE tmp___7 != 1024 [L709] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 167 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 22528.3ms, OverallIterations: 16, TraceHistogramMax: 6, EmptinessCheckTime: 65.4ms, AutomataDifference: 3766.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 16.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4243 SDtfs, 3457 SDslu, 3563 SDs, 0 SdLazy, 1845 SolverSat, 474 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1625.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3194 GetRequests, 3165 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 104.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=4132occurred in iteration=15, InterpolantAutomatonStates: 57, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1235.2ms AutomataMinimizationTime, 15 MinimizatonAttempts, 5601 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 271.7ms SsaConstructionTime, 677.7ms SatisfiabilityAnalysisTime, 7477.0ms InterpolantComputationTime, 1767 NumberOfCodeBlocks, 1767 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 3190 ConstructedInterpolants, 0 QuantifiedInterpolants, 4685 SizeOfPredicates, 7 NumberOfNonLiveVariables, 2252 ConjunctsInSsa, 37 ConjunctsInUnsatCore, 30 InterpolantComputations, 30 PerfectInterpolantSequences, 3016/3016 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 02:22:37,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98cd92cf-88bd-438e-b918-f9d6c3a1ac50/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...