./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/rangesum.i --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_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/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_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/reducercommutativity/rangesum.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/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_16c395ab-369a-4a44-ba50-04dbb8a5d63b/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 a9e9e68a4ced07da63a78ebad1c2cc86cbb57dae ......................................................................................................................................................................................................................................................................................................................................................... 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_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/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_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/reducercommutativity/rangesum.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/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_16c395ab-369a-4a44-ba50-04dbb8a5d63b/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 a9e9e68a4ced07da63a78ebad1c2cc86cbb57dae .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 02:59:42,500 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:59:42,502 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:59:42,535 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:59:42,536 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:59:42,537 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:59:42,539 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:59:42,542 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:59:42,545 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:59:42,546 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:59:42,547 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:59:42,549 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:59:42,550 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:59:42,551 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:59:42,553 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:59:42,555 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:59:42,556 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:59:42,557 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:59:42,559 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:59:42,562 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:59:42,564 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:59:42,566 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:59:42,567 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:59:42,568 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:59:42,573 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:59:42,573 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:59:42,574 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:59:42,575 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:59:42,576 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:59:42,577 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:59:42,577 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:59:42,579 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:59:42,580 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:59:42,581 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:59:42,582 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:59:42,583 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:59:42,584 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:59:42,585 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:59:42,585 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:59:42,587 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:59:42,588 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:59:42,589 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 02:59:42,619 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:59:42,620 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:59:42,621 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:59:42,621 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:59:42,621 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:59:42,622 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:59:42,622 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:59:42,622 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:59:42,623 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:59:42,623 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:59:42,623 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:59:42,624 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:59:42,624 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:59:42,625 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:59:42,625 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:59:42,626 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:59:42,626 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:59:42,626 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:59:42,627 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:59:42,627 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:59:42,627 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:59:42,628 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:59:42,628 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:59:42,628 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:59:42,628 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:59:42,629 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:59:42,629 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:59:42,629 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:59:42,630 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:59:42,630 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:59:42,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:59:42,631 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:59:42,631 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:59:42,631 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:59:42,631 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:59:42,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:59:42,632 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:59:42,632 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:59:42,632 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:59:42,633 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_16c395ab-369a-4a44-ba50-04dbb8a5d63b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a9e9e68a4ced07da63a78ebad1c2cc86cbb57dae [2021-10-16 02:59:42,918 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:59:42,955 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:59:42,958 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:59:42,960 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:59:42,961 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:59:42,962 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/reducercommutativity/rangesum.i [2021-10-16 02:59:43,041 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/data/d5cd8497c/152b572844ab4cc98f212dc0e8756d0a/FLAG16030a7a9 [2021-10-16 02:59:43,730 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:59:43,731 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/sv-benchmarks/c/reducercommutativity/rangesum.i [2021-10-16 02:59:43,748 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/data/d5cd8497c/152b572844ab4cc98f212dc0e8756d0a/FLAG16030a7a9 [2021-10-16 02:59:44,060 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/data/d5cd8497c/152b572844ab4cc98f212dc0e8756d0a [2021-10-16 02:59:44,063 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:59:44,065 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:59:44,068 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:59:44,068 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:59:44,072 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:59:44,073 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:59:44" (1/1) ... [2021-10-16 02:59:44,075 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e7efba2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:59:44, skipping insertion in model container [2021-10-16 02:59:44,076 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:59:44" (1/1) ... [2021-10-16 02:59:44,084 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:59:44,106 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:59:44,342 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_16c395ab-369a-4a44-ba50-04dbb8a5d63b/sv-benchmarks/c/reducercommutativity/rangesum.i[1544,1557] [2021-10-16 02:59:44,346 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:59:44,356 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:59:44,384 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_16c395ab-369a-4a44-ba50-04dbb8a5d63b/sv-benchmarks/c/reducercommutativity/rangesum.i[1544,1557] [2021-10-16 02:59:44,392 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:59:44,409 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:59:44,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:59:44 WrapperNode [2021-10-16 02:59:44,410 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:59:44,411 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:59:44,412 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:59:44,412 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:59:44,421 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:59:44" (1/1) ... [2021-10-16 02:59:44,440 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:59:44" (1/1) ... [2021-10-16 02:59:44,480 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:59:44,493 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:59:44,493 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:59:44,493 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:59:44,503 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:59:44" (1/1) ... [2021-10-16 02:59:44,505 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:59:44" (1/1) ... [2021-10-16 02:59:44,513 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:59:44" (1/1) ... [2021-10-16 02:59:44,520 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:59:44" (1/1) ... [2021-10-16 02:59:44,529 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:59:44" (1/1) ... [2021-10-16 02:59:44,547 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:59:44" (1/1) ... [2021-10-16 02:59:44,549 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:59:44" (1/1) ... [2021-10-16 02:59:44,552 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:59:44,553 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:59:44,554 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:59:44,554 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:59:44,555 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:59:44" (1/1) ... [2021-10-16 02:59:44,563 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:59:44,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:59:44,591 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:59:44,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:59:44,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 02:59:44,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:59:44,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-16 02:59:44,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:59:44,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:59:44,663 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-16 02:59:44,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 02:59:45,422 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:59:45,423 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-10-16 02:59:45,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:59:45 BoogieIcfgContainer [2021-10-16 02:59:45,426 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:59:45,428 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:59:45,429 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:59:45,433 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:59:45,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:59:44" (1/3) ... [2021-10-16 02:59:45,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@219f0870 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:59:45, skipping insertion in model container [2021-10-16 02:59:45,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:59:44" (2/3) ... [2021-10-16 02:59:45,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@219f0870 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:59:45, skipping insertion in model container [2021-10-16 02:59:45,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:59:45" (3/3) ... [2021-10-16 02:59:45,437 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum.i [2021-10-16 02:59:45,443 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:59:45,444 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:59:45,499 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:59:45,506 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 02:59:45,506 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 02:59:45,521 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:59:45,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-16 02:59:45,545 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:59:45,546 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:59:45,546 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:59:45,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:59:45,553 INFO L82 PathProgramCache]: Analyzing trace with hash 229226227, now seen corresponding path program 1 times [2021-10-16 02:59:45,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:59:45,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625372712] [2021-10-16 02:59:45,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:59:45,566 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:59:45,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:59:45,781 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 02:59:45,782 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:59:45,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625372712] [2021-10-16 02:59:45,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625372712] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:59:45,784 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:59:45,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:59:45,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053250834] [2021-10-16 02:59:45,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:59:45,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:59:45,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:59:45,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:59:45,811 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:59:45,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:59:45,884 INFO L93 Difference]: Finished difference Result 24 states and 35 transitions. [2021-10-16 02:59:45,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:59:45,887 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-16 02:59:45,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:59:45,924 INFO L225 Difference]: With dead ends: 24 [2021-10-16 02:59:45,925 INFO L226 Difference]: Without dead ends: 11 [2021-10-16 02:59:45,928 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:59:45,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-10-16 02:59:45,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-10-16 02:59:45,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:59:45,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 15 transitions. [2021-10-16 02:59:45,965 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 15 transitions. Word has length 9 [2021-10-16 02:59:45,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:59:45,966 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 15 transitions. [2021-10-16 02:59:45,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:59:45,967 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 15 transitions. [2021-10-16 02:59:45,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-16 02:59:45,968 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:59:45,969 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:59:45,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 02:59:45,970 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:59:45,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:59:45,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1349883903, now seen corresponding path program 1 times [2021-10-16 02:59:45,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:59:45,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925913081] [2021-10-16 02:59:45,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:59:45,975 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:59:46,032 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:59:46,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2058090171] [2021-10-16 02:59:46,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:59:46,034 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:59:46,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:59:46,039 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:59:46,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 02:59:46,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:59:46,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:59:46,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:59:46,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:59:46,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:59:46,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:59:46,393 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:59:46,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925913081] [2021-10-16 02:59:46,394 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:59:46,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058090171] [2021-10-16 02:59:46,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058090171] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:59:46,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1844217673] [2021-10-16 02:59:46,436 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-10-16 02:59:46,436 INFO L166 IcfgInterpreter]: Building call graph [2021-10-16 02:59:46,442 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-16 02:59:46,449 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-16 02:59:46,449 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-16 02:59:46,488 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:59:46,496 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:59:46,497 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:59:46,498 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-16 02:59:46,499 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:59:46,500 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:59:46,501 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-10-16 02:59:46,504 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-10-16 02:59:46,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:59:46,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-10-16 02:59:46,549 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:59:46,550 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-10-16 02:59:46,551 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:59:46,552 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-10-16 02:59:46,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-16 02:59:46,555 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:59:46,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:59:46,577 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:59:46,579 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-10-16 02:59:46,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-16 02:59:46,581 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:94, output treesize:95 [2021-10-16 02:59:46,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:59:46,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:59:46,804 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#valid_14| 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 02:59:46,809 INFO L168 Benchmark]: Toolchain (without parser) took 2742.99 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 58.3 MB in the beginning and 71.2 MB in the end (delta: -12.9 MB). Peak memory consumption was 8.3 MB. Max. memory is 16.1 GB. [2021-10-16 02:59:46,810 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 100.7 MB. Free memory was 75.1 MB in the beginning and 75.1 MB in the end (delta: 53.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:59:46,810 INFO L168 Benchmark]: CACSL2BoogieTranslator took 342.58 ms. Allocated memory is still 100.7 MB. Free memory was 58.1 MB in the beginning and 74.0 MB in the end (delta: -15.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-16 02:59:46,811 INFO L168 Benchmark]: Boogie Procedure Inliner took 80.78 ms. Allocated memory is still 100.7 MB. Free memory was 74.0 MB in the beginning and 71.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:59:46,812 INFO L168 Benchmark]: Boogie Preprocessor took 59.71 ms. Allocated memory is still 100.7 MB. Free memory was 71.9 MB in the beginning and 70.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:59:46,813 INFO L168 Benchmark]: RCFGBuilder took 873.17 ms. Allocated memory is still 100.7 MB. Free memory was 70.5 MB in the beginning and 48.0 MB in the end (delta: 22.5 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:59:46,813 INFO L168 Benchmark]: TraceAbstraction took 1378.89 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 47.4 MB in the beginning and 71.2 MB in the end (delta: -23.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:59:46,818 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 100.7 MB. Free memory was 75.1 MB in the beginning and 75.1 MB in the end (delta: 53.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 342.58 ms. Allocated memory is still 100.7 MB. Free memory was 58.1 MB in the beginning and 74.0 MB in the end (delta: -15.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 80.78 ms. Allocated memory is still 100.7 MB. Free memory was 74.0 MB in the beginning and 71.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 59.71 ms. Allocated memory is still 100.7 MB. Free memory was 71.9 MB in the beginning and 70.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 873.17 ms. Allocated memory is still 100.7 MB. Free memory was 70.5 MB in the beginning and 48.0 MB in the end (delta: 22.5 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1378.89 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 47.4 MB in the beginning and 71.2 MB in the end (delta: -23.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#valid_14| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_14|: 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 02:59:46,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/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 02:59:49,696 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:59:49,700 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:59:49,749 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:59:49,750 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:59:49,751 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:59:49,754 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:59:49,757 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:59:49,759 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:59:49,761 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:59:49,762 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:59:49,764 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:59:49,764 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:59:49,766 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:59:49,768 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:59:49,770 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:59:49,771 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:59:49,773 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:59:49,775 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:59:49,778 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:59:49,781 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:59:49,782 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:59:49,786 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:59:49,789 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:59:49,794 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:59:49,802 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:59:49,803 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:59:49,804 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:59:49,805 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:59:49,806 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:59:49,810 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:59:49,811 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:59:49,812 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:59:49,814 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:59:49,816 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:59:49,817 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:59:49,818 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:59:49,819 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:59:49,819 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:59:49,820 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:59:49,822 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:59:49,823 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-16 02:59:49,868 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:59:49,868 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:59:49,870 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:59:49,870 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:59:49,870 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:59:49,871 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:59:49,871 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:59:49,871 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:59:49,871 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:59:49,873 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:59:49,874 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:59:49,874 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:59:49,874 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:59:49,875 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:59:49,875 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:59:49,875 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:59:49,875 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:59:49,876 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 02:59:49,876 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 02:59:49,876 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:59:49,876 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:59:49,877 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:59:49,877 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:59:49,877 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:59:49,877 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 02:59:49,878 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:59:49,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:59:49,878 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:59:49,878 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:59:49,878 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:59:49,879 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 02:59:49,879 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 02:59:49,879 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:59:49,879 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:59:49,880 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:59:49,880 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_16c395ab-369a-4a44-ba50-04dbb8a5d63b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a9e9e68a4ced07da63a78ebad1c2cc86cbb57dae [2021-10-16 02:59:50,341 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:59:50,372 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:59:50,375 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:59:50,376 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:59:50,377 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:59:50,378 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/reducercommutativity/rangesum.i [2021-10-16 02:59:50,457 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/data/c60a29441/67ee7824515c48a6938a9cbc8624430b/FLAGac4e1026e [2021-10-16 02:59:51,164 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:59:51,165 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/sv-benchmarks/c/reducercommutativity/rangesum.i [2021-10-16 02:59:51,175 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/data/c60a29441/67ee7824515c48a6938a9cbc8624430b/FLAGac4e1026e [2021-10-16 02:59:51,457 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/data/c60a29441/67ee7824515c48a6938a9cbc8624430b [2021-10-16 02:59:51,465 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:59:51,466 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:59:51,467 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:59:51,467 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:59:51,471 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:59:51,472 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:59:51" (1/1) ... [2021-10-16 02:59:51,474 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d33c2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:59:51, skipping insertion in model container [2021-10-16 02:59:51,474 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:59:51" (1/1) ... [2021-10-16 02:59:51,483 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:59:51,503 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:59:51,662 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_16c395ab-369a-4a44-ba50-04dbb8a5d63b/sv-benchmarks/c/reducercommutativity/rangesum.i[1544,1557] [2021-10-16 02:59:51,666 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:59:51,680 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:59:51,708 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_16c395ab-369a-4a44-ba50-04dbb8a5d63b/sv-benchmarks/c/reducercommutativity/rangesum.i[1544,1557] [2021-10-16 02:59:51,709 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:59:51,725 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:59:51,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:59:51 WrapperNode [2021-10-16 02:59:51,726 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:59:51,727 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:59:51,727 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:59:51,727 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:59:51,749 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:59:51" (1/1) ... [2021-10-16 02:59:51,772 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:59:51" (1/1) ... [2021-10-16 02:59:51,801 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:59:51,802 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:59:51,802 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:59:51,802 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:59:51,809 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:59:51" (1/1) ... [2021-10-16 02:59:51,809 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:59:51" (1/1) ... [2021-10-16 02:59:51,814 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:59:51" (1/1) ... [2021-10-16 02:59:51,814 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:59:51" (1/1) ... [2021-10-16 02:59:51,826 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:59:51" (1/1) ... [2021-10-16 02:59:51,841 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:59:51" (1/1) ... [2021-10-16 02:59:51,843 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:59:51" (1/1) ... [2021-10-16 02:59:51,848 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:59:51,860 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:59:51,861 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:59:51,861 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:59:51,863 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:59:51" (1/1) ... [2021-10-16 02:59:51,871 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:59:51,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:59:51,902 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:59:51,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:59:51,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 02:59:51,960 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:59:51,960 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-16 02:59:51,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:59:51,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:59:51,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 02:59:51,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-16 02:59:53,268 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:59:53,268 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-10-16 02:59:53,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:59:53 BoogieIcfgContainer [2021-10-16 02:59:53,271 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:59:53,273 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:59:53,273 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:59:53,276 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:59:53,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:59:51" (1/3) ... [2021-10-16 02:59:53,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9a88b59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:59:53, skipping insertion in model container [2021-10-16 02:59:53,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:59:51" (2/3) ... [2021-10-16 02:59:53,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9a88b59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:59:53, skipping insertion in model container [2021-10-16 02:59:53,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:59:53" (3/3) ... [2021-10-16 02:59:53,281 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum.i [2021-10-16 02:59:53,287 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:59:53,288 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:59:53,361 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:59:53,367 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 02:59:53,368 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 02:59:53,384 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 31 states have internal predecessors, (49), 0 states have call successors, (0), 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 02:59:53,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-16 02:59:53,391 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:59:53,392 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:59:53,392 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:59:53,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:59:53,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1829542603, now seen corresponding path program 1 times [2021-10-16 02:59:53,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:59:53,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [589522482] [2021-10-16 02:59:53,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:59:53,414 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:59:53,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:59:53,428 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:59:53,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 02:59:53,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:59:54,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-16 02:59:54,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:59:54,214 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 02:59:54,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:59:54,291 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 02:59:54,292 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:59:54,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [589522482] [2021-10-16 02:59:54,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [589522482] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:59:54,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:59:54,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-16 02:59:54,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252405365] [2021-10-16 02:59:54,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-16 02:59:54,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:59:54,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-16 02:59:54,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 02:59:54,321 INFO L87 Difference]: Start difference. First operand has 32 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 31 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:59:54,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:59:54,341 INFO L93 Difference]: Finished difference Result 59 states and 90 transitions. [2021-10-16 02:59:54,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-16 02:59:54,343 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-16 02:59:54,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:59:54,352 INFO L225 Difference]: With dead ends: 59 [2021-10-16 02:59:54,352 INFO L226 Difference]: Without dead ends: 27 [2021-10-16 02:59:54,355 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 02:59:54,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-16 02:59:54,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-10-16 02:59:54,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 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 02:59:54,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2021-10-16 02:59:54,392 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 18 [2021-10-16 02:59:54,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:59:54,393 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2021-10-16 02:59:54,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:59:54,394 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2021-10-16 02:59:54,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-16 02:59:54,395 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:59:54,395 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:59:54,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:59:54,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:59:54,621 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:59:54,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:59:54,622 INFO L82 PathProgramCache]: Analyzing trace with hash -97699309, now seen corresponding path program 1 times [2021-10-16 02:59:54,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:59:54,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1293867267] [2021-10-16 02:59:54,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:59:54,624 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:59:54,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:59:54,625 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:59:54,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 02:59:55,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:59:55,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:59:55,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:59:55,157 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 02:59:55,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:59:55,254 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 02:59:55,255 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:59:55,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1293867267] [2021-10-16 02:59:55,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1293867267] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:59:55,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:59:55,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-16 02:59:55,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098424550] [2021-10-16 02:59:55,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:59:55,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:59:55,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:59:55,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:59:55,265 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:59:55,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:59:55,783 INFO L93 Difference]: Finished difference Result 65 states and 90 transitions. [2021-10-16 02:59:55,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:59:55,784 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-16 02:59:55,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:59:55,785 INFO L225 Difference]: With dead ends: 65 [2021-10-16 02:59:55,786 INFO L226 Difference]: Without dead ends: 48 [2021-10-16 02:59:55,787 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:59:55,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-10-16 02:59:55,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 39. [2021-10-16 02:59:55,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 38 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 02:59:55,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 55 transitions. [2021-10-16 02:59:55,797 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 55 transitions. Word has length 18 [2021-10-16 02:59:55,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:59:55,797 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 55 transitions. [2021-10-16 02:59:55,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:59:55,798 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 55 transitions. [2021-10-16 02:59:55,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-16 02:59:55,799 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:59:55,800 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:59:55,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:59:56,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:59:56,016 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:59:56,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:59:56,017 INFO L82 PathProgramCache]: Analyzing trace with hash 840584081, now seen corresponding path program 1 times [2021-10-16 02:59:56,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:59:56,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1081510633] [2021-10-16 02:59:56,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:59:56,018 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:59:56,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:59:56,020 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:59:56,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 02:59:56,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:59:56,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 02:59:56,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:59:56,524 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 02:59:56,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:59:56,773 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 02:59:56,773 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:59:56,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1081510633] [2021-10-16 02:59:56,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1081510633] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:59:56,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:59:56,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2021-10-16 02:59:56,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721739654] [2021-10-16 02:59:56,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 02:59:56,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:59:56,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 02:59:56,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:59:56,777 INFO L87 Difference]: Start difference. First operand 39 states and 55 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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 02:59:57,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:59:57,431 INFO L93 Difference]: Finished difference Result 96 states and 125 transitions. [2021-10-16 02:59:57,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-16 02:59:57,432 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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 18 [2021-10-16 02:59:57,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:59:57,435 INFO L225 Difference]: With dead ends: 96 [2021-10-16 02:59:57,435 INFO L226 Difference]: Without dead ends: 91 [2021-10-16 02:59:57,436 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 210.1ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-10-16 02:59:57,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-10-16 02:59:57,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 59. [2021-10-16 02:59:57,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.4482758620689655) internal successors, (84), 58 states have internal predecessors, (84), 0 states have call successors, (0), 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 02:59:57,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 84 transitions. [2021-10-16 02:59:57,451 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 84 transitions. Word has length 18 [2021-10-16 02:59:57,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:59:57,451 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 84 transitions. [2021-10-16 02:59:57,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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 02:59:57,452 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 84 transitions. [2021-10-16 02:59:57,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-16 02:59:57,453 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:59:57,454 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 02:59:57,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-16 02:59:57,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:59:57,668 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:59:57,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:59:57,668 INFO L82 PathProgramCache]: Analyzing trace with hash -995174774, now seen corresponding path program 1 times [2021-10-16 02:59:57,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:59:57,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [42984460] [2021-10-16 02:59:57,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:59:57,670 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:59:57,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:59:57,672 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:59:57,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-16 02:59:57,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:59:57,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:59:57,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:59:58,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:59:58,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:59:58,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:59:58,955 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:59:58,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [42984460] [2021-10-16 02:59:58,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [42984460] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:59:58,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:59:58,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-16 02:59:58,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186536336] [2021-10-16 02:59:58,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:59:58,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:59:58,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:59:58,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:59:58,958 INFO L87 Difference]: Start difference. First operand 59 states and 84 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:00:00,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:00:00,383 INFO L93 Difference]: Finished difference Result 139 states and 204 transitions. [2021-10-16 03:00:00,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 03:00:00,388 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-16 03:00:00,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:00:00,390 INFO L225 Difference]: With dead ends: 139 [2021-10-16 03:00:00,391 INFO L226 Difference]: Without dead ends: 89 [2021-10-16 03:00:00,391 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 473.0ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-16 03:00:00,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-10-16 03:00:00,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 84. [2021-10-16 03:00:00,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.3132530120481927) internal successors, (109), 83 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 03:00:00,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 109 transitions. [2021-10-16 03:00:00,405 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 109 transitions. Word has length 21 [2021-10-16 03:00:00,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:00:00,406 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 109 transitions. [2021-10-16 03:00:00,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:00:00,406 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 109 transitions. [2021-10-16 03:00:00,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-16 03:00:00,408 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:00:00,408 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:00:00,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-16 03:00:00,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:00:00,625 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:00:00,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:00:00,626 INFO L82 PathProgramCache]: Analyzing trace with hash -2004602614, now seen corresponding path program 1 times [2021-10-16 03:00:00,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:00:00,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1823883946] [2021-10-16 03:00:00,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:00:00,627 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:00:00,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:00:00,630 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:00:00,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-16 03:00:00,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:00:00,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 03:00:00,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:00:01,060 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-16 03:00:01,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:00:03,309 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-16 03:00:03,309 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:00:03,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1823883946] [2021-10-16 03:00:03,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1823883946] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 03:00:03,310 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-16 03:00:03,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-10-16 03:00:03,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955509045] [2021-10-16 03:00:03,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 03:00:03,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:00:03,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 03:00:03,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-10-16 03:00:03,312 INFO L87 Difference]: Start difference. First operand 84 states and 109 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:00:03,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:00:03,549 INFO L93 Difference]: Finished difference Result 165 states and 215 transitions. [2021-10-16 03:00:03,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 03:00:03,550 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 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 39 [2021-10-16 03:00:03,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:00:03,551 INFO L225 Difference]: With dead ends: 165 [2021-10-16 03:00:03,552 INFO L226 Difference]: Without dead ends: 86 [2021-10-16 03:00:03,553 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 978.2ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-10-16 03:00:03,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-10-16 03:00:03,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-10-16 03:00:03,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.3095238095238095) internal successors, (110), 84 states have internal predecessors, (110), 0 states have call successors, (0), 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 03:00:03,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 110 transitions. [2021-10-16 03:00:03,565 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 110 transitions. Word has length 39 [2021-10-16 03:00:03,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:00:03,566 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 110 transitions. [2021-10-16 03:00:03,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 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 03:00:03,567 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 110 transitions. [2021-10-16 03:00:03,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-16 03:00:03,569 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:00:03,569 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:00:03,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-16 03:00:03,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:00:03,784 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:00:03,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:00:03,784 INFO L82 PathProgramCache]: Analyzing trace with hash -953734868, now seen corresponding path program 1 times [2021-10-16 03:00:03,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:00:03,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1648465079] [2021-10-16 03:00:03,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:00:03,785 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:00:03,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:00:03,787 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:00:03,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-16 03:00:04,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:00:04,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 03:00:04,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:00:04,292 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-16 03:00:04,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:00:07,090 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-16 03:00:07,091 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:00:07,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1648465079] [2021-10-16 03:00:07,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1648465079] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:00:07,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [8593286] [2021-10-16 03:00:07,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:00:07,092 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 03:00:07,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 03:00:07,094 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 03:00:07,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-10-16 03:00:07,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:00:07,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 03:00:07,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:00:07,889 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-16 03:00:07,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:00:08,427 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-16 03:00:08,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [8593286] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:00:08,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113843256] [2021-10-16 03:00:08,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:00:08,428 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:00:08,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:00:08,429 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 03:00:08,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-16 03:00:08,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:00:08,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 03:00:08,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:00:09,069 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-16 03:00:09,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:00:09,215 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-16 03:00:09,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113843256] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:00:09,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 03:00:09,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8, 4, 4, 4, 4] total 12 [2021-10-16 03:00:09,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077383475] [2021-10-16 03:00:09,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 03:00:09,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:00:09,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 03:00:09,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:00:09,219 INFO L87 Difference]: Start difference. First operand 85 states and 110 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 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 03:00:11,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:00:11,495 INFO L93 Difference]: Finished difference Result 172 states and 222 transitions. [2021-10-16 03:00:11,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 03:00:11,500 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 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 41 [2021-10-16 03:00:11,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:00:11,501 INFO L225 Difference]: With dead ends: 172 [2021-10-16 03:00:11,501 INFO L226 Difference]: Without dead ends: 93 [2021-10-16 03:00:11,502 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1823.0ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-10-16 03:00:11,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-10-16 03:00:11,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 87. [2021-10-16 03:00:11,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.302325581395349) internal successors, (112), 86 states have internal predecessors, (112), 0 states have call successors, (0), 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 03:00:11,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 112 transitions. [2021-10-16 03:00:11,517 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 112 transitions. Word has length 41 [2021-10-16 03:00:11,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:00:11,517 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 112 transitions. [2021-10-16 03:00:11,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 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 03:00:11,518 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 112 transitions. [2021-10-16 03:00:11,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-16 03:00:11,520 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:00:11,520 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:00:11,555 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-10-16 03:00:11,731 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2021-10-16 03:00:11,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-16 03:00:12,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:00:12,131 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:00:12,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:00:12,131 INFO L82 PathProgramCache]: Analyzing trace with hash -387145522, now seen corresponding path program 2 times [2021-10-16 03:00:12,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:00:12,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [424121018] [2021-10-16 03:00:12,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 03:00:12,132 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:00:12,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:00:12,132 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:00:12,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-16 03:00:12,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-16 03:00:12,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 03:00:12,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 03:00:12,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:00:12,633 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-10-16 03:00:12,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:00:12,937 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-10-16 03:00:12,937 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:00:12,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [424121018] [2021-10-16 03:00:12,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [424121018] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:00:12,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:00:12,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-16 03:00:12,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893524676] [2021-10-16 03:00:12,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 03:00:12,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:00:12,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 03:00:12,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-16 03:00:12,940 INFO L87 Difference]: Start difference. First operand 87 states and 112 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 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 03:00:13,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:00:13,254 INFO L93 Difference]: Finished difference Result 122 states and 156 transitions. [2021-10-16 03:00:13,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 03:00:13,258 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 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 43 [2021-10-16 03:00:13,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:00:13,259 INFO L225 Difference]: With dead ends: 122 [2021-10-16 03:00:13,259 INFO L226 Difference]: Without dead ends: 91 [2021-10-16 03:00:13,262 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 86.2ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-16 03:00:13,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-10-16 03:00:13,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2021-10-16 03:00:13,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.2954545454545454) internal successors, (114), 88 states have internal predecessors, (114), 0 states have call successors, (0), 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 03:00:13,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 114 transitions. [2021-10-16 03:00:13,275 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 114 transitions. Word has length 43 [2021-10-16 03:00:13,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:00:13,275 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 114 transitions. [2021-10-16 03:00:13,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 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 03:00:13,276 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 114 transitions. [2021-10-16 03:00:13,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-16 03:00:13,278 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:00:13,279 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:00:13,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-16 03:00:13,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:00:13,496 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:00:13,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:00:13,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1297182544, now seen corresponding path program 1 times [2021-10-16 03:00:13,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:00:13,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [459672231] [2021-10-16 03:00:13,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:00:13,498 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:00:13,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:00:13,501 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:00:13,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-16 03:00:13,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:00:13,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 03:00:13,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:00:14,541 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-16 03:00:14,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:00:20,086 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-16 03:00:20,086 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:00:20,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [459672231] [2021-10-16 03:00:20,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [459672231] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:00:20,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [701717118] [2021-10-16 03:00:20,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:00:20,087 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 03:00:20,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 03:00:20,089 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 03:00:20,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-10-16 03:00:20,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:00:20,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 03:00:20,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:00:21,291 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-16 03:00:21,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:00:23,574 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-16 03:00:23,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [701717118] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:00:23,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208750311] [2021-10-16 03:00:23,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:00:23,575 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:00:23,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:00:23,576 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 03:00:23,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-16 03:00:24,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:00:24,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-16 03:00:24,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:00:24,856 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-16 03:00:24,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:00:27,856 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-16 03:00:27,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208750311] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:00:27,856 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 03:00:27,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9, 9, 11, 10] total 29 [2021-10-16 03:00:27,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884024423] [2021-10-16 03:00:27,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-16 03:00:27,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:00:27,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-16 03:00:27,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2021-10-16 03:00:27,859 INFO L87 Difference]: Start difference. First operand 89 states and 114 transitions. Second operand has 29 states, 29 states have (on average 4.275862068965517) internal successors, (124), 29 states have internal predecessors, (124), 0 states have call successors, (0), 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 03:00:44,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:00:44,570 INFO L93 Difference]: Finished difference Result 245 states and 310 transitions. [2021-10-16 03:00:44,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-16 03:00:44,575 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.275862068965517) internal successors, (124), 29 states have internal predecessors, (124), 0 states have call successors, (0), 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 45 [2021-10-16 03:00:44,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:00:44,577 INFO L225 Difference]: With dead ends: 245 [2021-10-16 03:00:44,577 INFO L226 Difference]: Without dead ends: 140 [2021-10-16 03:00:44,579 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 236 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 17081.1ms TimeCoverageRelationStatistics Valid=716, Invalid=2040, Unknown=0, NotChecked=0, Total=2756 [2021-10-16 03:00:44,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-10-16 03:00:44,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 107. [2021-10-16 03:00:44,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.2735849056603774) internal successors, (135), 106 states have internal predecessors, (135), 0 states have call successors, (0), 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 03:00:44,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 135 transitions. [2021-10-16 03:00:44,595 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 135 transitions. Word has length 45 [2021-10-16 03:00:44,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:00:44,595 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 135 transitions. [2021-10-16 03:00:44,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.275862068965517) internal successors, (124), 29 states have internal predecessors, (124), 0 states have call successors, (0), 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 03:00:44,596 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 135 transitions. [2021-10-16 03:00:44,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-16 03:00:44,599 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:00:44,599 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:00:44,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-16 03:00:44,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-16 03:00:45,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-10-16 03:00:45,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 03:00:45,208 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:00:45,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:00:45,209 INFO L82 PathProgramCache]: Analyzing trace with hash 2059565289, now seen corresponding path program 1 times [2021-10-16 03:00:45,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:00:45,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1841871346] [2021-10-16 03:00:45,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:00:45,209 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:00:45,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:00:45,211 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:00:45,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-16 03:00:45,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:00:45,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-16 03:00:45,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:00:46,167 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-16 03:00:46,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:00:50,360 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-16 03:00:50,360 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:00:50,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1841871346] [2021-10-16 03:00:50,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1841871346] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:00:50,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1092667505] [2021-10-16 03:00:50,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:00:50,361 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 03:00:50,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 03:00:50,364 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 03:00:50,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-10-16 03:00:51,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:00:51,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 03:00:51,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:00:52,565 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-16 03:00:52,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:00:54,888 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-16 03:00:54,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1092667505] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:00:54,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001689564] [2021-10-16 03:00:54,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:00:54,889 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:00:54,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:00:54,889 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 03:00:54,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-16 03:00:55,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:00:55,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-16 03:00:55,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:00:55,840 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-16 03:00:55,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:01:00,308 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-16 03:01:00,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001689564] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:01:00,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 03:01:00,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 11, 11, 11, 14] total 45 [2021-10-16 03:01:00,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11669993] [2021-10-16 03:01:00,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-10-16 03:01:00,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:01:00,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-10-16 03:01:00,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=1592, Unknown=0, NotChecked=0, Total=1980 [2021-10-16 03:01:00,311 INFO L87 Difference]: Start difference. First operand 107 states and 135 transitions. Second operand has 45 states, 45 states have (on average 2.6222222222222222) internal successors, (118), 45 states have internal predecessors, (118), 0 states have call successors, (0), 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 03:01:17,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:01:17,781 INFO L93 Difference]: Finished difference Result 306 states and 406 transitions. [2021-10-16 03:01:17,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-16 03:01:17,785 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.6222222222222222) internal successors, (118), 45 states have internal predecessors, (118), 0 states have call successors, (0), 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 47 [2021-10-16 03:01:17,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:01:17,787 INFO L225 Difference]: With dead ends: 306 [2021-10-16 03:01:17,787 INFO L226 Difference]: Without dead ends: 215 [2021-10-16 03:01:17,790 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 20213.4ms TimeCoverageRelationStatistics Valid=1227, Invalid=4029, Unknown=0, NotChecked=0, Total=5256 [2021-10-16 03:01:17,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-10-16 03:01:17,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 178. [2021-10-16 03:01:17,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.1638418079096045) internal successors, (206), 177 states have internal predecessors, (206), 0 states have call successors, (0), 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 03:01:17,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 206 transitions. [2021-10-16 03:01:17,812 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 206 transitions. Word has length 47 [2021-10-16 03:01:17,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:01:17,812 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 206 transitions. [2021-10-16 03:01:17,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.6222222222222222) internal successors, (118), 45 states have internal predecessors, (118), 0 states have call successors, (0), 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 03:01:17,813 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 206 transitions. [2021-10-16 03:01:17,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-16 03:01:17,816 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:01:17,816 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-10-16 03:01:17,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-16 03:01:18,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-10-16 03:01:18,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-16 03:01:18,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:01:18,434 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:01:18,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:01:18,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1875846409, now seen corresponding path program 1 times [2021-10-16 03:01:18,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:01:18,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2137390565] [2021-10-16 03:01:18,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:01:18,435 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:01:18,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:01:18,437 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:01:18,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-16 03:01:19,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 03:01:19,573 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-16 03:01:20,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 03:01:20,375 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-16 03:01:20,376 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-16 03:01:20,377 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 03:01:20,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-16 03:01:20,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:01:20,605 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 03:01:20,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 03:01:20 BoogieIcfgContainer [2021-10-16 03:01:20,683 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 03:01:20,684 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 03:01:20,684 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 03:01:20,685 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 03:01:20,685 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:59:53" (3/4) ... [2021-10-16 03:01:20,687 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-16 03:01:20,767 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/witness.graphml [2021-10-16 03:01:20,768 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 03:01:20,769 INFO L168 Benchmark]: Toolchain (without parser) took 89302.60 ms. Allocated memory was 65.0 MB in the beginning and 86.0 MB in the end (delta: 21.0 MB). Free memory was 45.4 MB in the beginning and 23.6 MB in the end (delta: 21.9 MB). Peak memory consumption was 45.8 MB. Max. memory is 16.1 GB. [2021-10-16 03:01:20,770 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 65.0 MB. Free memory is still 46.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:01:20,770 INFO L168 Benchmark]: CACSL2BoogieTranslator took 259.05 ms. Allocated memory is still 65.0 MB. Free memory was 45.2 MB in the beginning and 34.7 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 03:01:20,771 INFO L168 Benchmark]: Boogie Procedure Inliner took 73.86 ms. Allocated memory is still 65.0 MB. Free memory was 34.6 MB in the beginning and 48.3 MB in the end (delta: -13.7 MB). Peak memory consumption was 5.3 MB. Max. memory is 16.1 GB. [2021-10-16 03:01:20,771 INFO L168 Benchmark]: Boogie Preprocessor took 46.17 ms. Allocated memory is still 65.0 MB. Free memory was 48.3 MB in the beginning and 46.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:01:20,772 INFO L168 Benchmark]: RCFGBuilder took 1410.94 ms. Allocated memory is still 65.0 MB. Free memory was 46.7 MB in the beginning and 34.1 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-16 03:01:20,772 INFO L168 Benchmark]: TraceAbstraction took 87410.84 ms. Allocated memory was 65.0 MB in the beginning and 86.0 MB in the end (delta: 21.0 MB). Free memory was 33.5 MB in the beginning and 29.3 MB in the end (delta: 4.2 MB). Peak memory consumption was 25.9 MB. Max. memory is 16.1 GB. [2021-10-16 03:01:20,773 INFO L168 Benchmark]: Witness Printer took 83.69 ms. Allocated memory is still 86.0 MB. Free memory was 29.3 MB in the beginning and 23.6 MB in the end (delta: 5.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-16 03:01:20,776 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 65.0 MB. Free memory is still 46.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 259.05 ms. Allocated memory is still 65.0 MB. Free memory was 45.2 MB in the beginning and 34.7 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 73.86 ms. Allocated memory is still 65.0 MB. Free memory was 34.6 MB in the beginning and 48.3 MB in the end (delta: -13.7 MB). Peak memory consumption was 5.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 46.17 ms. Allocated memory is still 65.0 MB. Free memory was 48.3 MB in the beginning and 46.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1410.94 ms. Allocated memory is still 65.0 MB. Free memory was 46.7 MB in the beginning and 34.1 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 87410.84 ms. Allocated memory was 65.0 MB in the beginning and 86.0 MB in the end (delta: 21.0 MB). Free memory was 33.5 MB in the beginning and 29.3 MB in the end (delta: 4.2 MB). Peak memory consumption was 25.9 MB. Max. memory is 16.1 GB. * Witness Printer took 83.69 ms. Allocated memory is still 86.0 MB. Free memory was 29.3 MB in the beginning and 23.6 MB in the end (delta: 5.7 MB). Peak memory consumption was 6.3 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: 64]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L15] int N; VAL [N=0] [L43] N = __VERIFIER_nondet_int() [L44] COND TRUE N > 1 [L45] int x[N]; [L17] int i; [L18] i = 0 VAL [N=3] [L18] COND TRUE i < N [L19] x[i] = __VERIFIER_nondet_int() [L18] i++ VAL [N=3] [L18] COND TRUE i < N [L19] x[i] = __VERIFIER_nondet_int() [L18] i++ VAL [N=3] [L18] COND TRUE i < N [L19] x[i] = __VERIFIER_nondet_int() [L18] i++ VAL [N=3] [L18] COND FALSE !(i < N) VAL [N=3] [L47] int temp; [L48] int ret; [L49] int ret2; [L50] int ret5; [L25] int i; [L26] long long ret; [L27] ret = 0 [L28] int cnt = 0; [L29] i = 0 VAL [N=3] [L29] COND TRUE i < N VAL [N=3] [L30] COND FALSE !(i > N/2) VAL [N=3] [L29] i++ VAL [N=3] [L29] COND TRUE i < N VAL [N=3] [L30] COND FALSE !(i > N/2) VAL [N=3] [L29] i++ VAL [N=3] [L29] COND TRUE i < N VAL [N=3] [L30] COND TRUE i > N/2 [L31] EXPR x[i] [L31] ret = ret + x[i] [L32] cnt = cnt + 1 VAL [N=3] [L29] i++ VAL [N=3] [L29] COND FALSE !(i < N) VAL [N=3] [L35] COND TRUE cnt !=0 [L36] return ret / cnt; VAL [N=3] [L52] ret = rangesum(x) [L54] EXPR x[0] [L54] temp=x[0] [L54] EXPR x[1] [L54] x[0] = x[1] [L54] x[1] = temp [L25] int i; [L26] long long ret; [L27] ret = 0 [L28] int cnt = 0; [L29] i = 0 VAL [N=3] [L29] COND TRUE i < N VAL [N=3] [L30] COND FALSE !(i > N/2) VAL [N=3] [L29] i++ VAL [N=3] [L29] COND TRUE i < N VAL [N=3] [L30] COND FALSE !(i > N/2) VAL [N=3] [L29] i++ VAL [N=3] [L29] COND TRUE i < N VAL [N=3] [L30] COND TRUE i > N/2 [L31] EXPR x[i] [L31] ret = ret + x[i] [L32] cnt = cnt + 1 VAL [N=3] [L29] i++ VAL [N=3] [L29] COND FALSE !(i < N) VAL [N=3] [L35] COND TRUE cnt !=0 [L36] return ret / cnt; VAL [N=3] [L55] ret2 = rangesum(x) [L56] EXPR x[0] [L56] temp=x[0] [L57] int i =0 ; VAL [N=3] [L57] COND TRUE i N/2) VAL [N=3] [L29] i++ VAL [N=3] [L29] COND TRUE i < N VAL [N=3] [L30] COND FALSE !(i > N/2) VAL [N=3] [L29] i++ VAL [N=3] [L29] COND TRUE i < N VAL [N=3] [L30] COND TRUE i > N/2 [L31] EXPR x[i] [L31] ret = ret + x[i] [L32] cnt = cnt + 1 VAL [N=3] [L29] i++ VAL [N=3] [L29] COND FALSE !(i < N) VAL [N=3] [L35] COND TRUE cnt !=0 [L36] return ret / cnt; VAL [N=3] [L61] ret5 = rangesum(x) [L63] COND TRUE ret != ret2 || ret !=ret5 VAL [N=3] [L64] reach_error() VAL [N=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 87244.0ms, OverallIterations: 10, TraceHistogramMax: 3, EmptinessCheckTime: 28.7ms, AutomataDifference: 39719.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 257 SDtfs, 1221 SDslu, 848 SDs, 0 SdLazy, 2223 SolverSat, 520 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 16456.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1137 GetRequests, 977 SyntacticMatches, 2 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2024 ImplicationChecksByTransitivity, 40874.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=178occurred in iteration=9, InterpolantAutomatonStates: 106, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 134.8ms AutomataMinimizationTime, 9 MinimizatonAttempts, 125 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 237.9ms SsaConstructionTime, 4640.7ms SatisfiabilityAnalysisTime, 35200.9ms InterpolantComputationTime, 611 NumberOfCodeBlocks, 586 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 1082 ConstructedInterpolants, 0 QuantifiedInterpolants, 4427 SizeOfPredicates, 35 NumberOfNonLiveVariables, 1402 ConjunctsInSsa, 111 ConjunctsInUnsatCore, 30 InterpolantComputations, 11 PerfectInterpolantSequences, 427/590 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 03:01:20,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16c395ab-369a-4a44-ba50-04dbb8a5d63b/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...