./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/s4iff.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/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_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/s4iff.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/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_83efae8a-ca35-4d7d-921d-84a99040f572/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 98b440d2018d3020f67dce8008e7aad4265ed1f1 ............................................................................................................................................................................................................................................................................................................................................................................................................. 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_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/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_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/s4iff.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/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_83efae8a-ca35-4d7d-921d-84a99040f572/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 98b440d2018d3020f67dce8008e7aad4265ed1f1 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 02:37:24,538 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:37:24,540 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:37:24,591 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:37:24,592 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:37:24,596 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:37:24,599 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:37:24,601 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:37:24,603 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:37:24,604 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:37:24,605 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:37:24,606 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:37:24,607 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:37:24,608 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:37:24,610 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:37:24,611 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:37:24,612 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:37:24,613 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:37:24,616 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:37:24,618 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:37:24,620 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:37:24,621 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:37:24,623 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:37:24,624 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:37:24,628 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:37:24,628 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:37:24,629 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:37:24,630 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:37:24,630 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:37:24,632 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:37:24,632 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:37:24,633 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:37:24,634 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:37:24,635 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:37:24,636 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:37:24,637 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:37:24,638 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:37:24,638 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:37:24,638 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:37:24,640 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:37:24,640 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:37:24,641 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 02:37:24,671 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:37:24,672 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:37:24,672 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:37:24,673 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:37:24,673 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:37:24,673 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:37:24,673 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:37:24,673 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:37:24,674 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:37:24,674 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:37:24,674 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:37:24,674 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:37:24,674 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:37:24,675 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:37:24,675 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:37:24,676 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:37:24,676 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:37:24,676 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:37:24,676 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:37:24,676 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:37:24,677 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:37:24,677 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:37:24,677 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:37:24,677 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:37:24,677 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:37:24,677 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:37:24,678 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:37:24,678 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:37:24,678 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:37:24,678 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:37:24,679 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:37:24,679 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:37:24,679 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:37:24,679 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:37:24,679 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:37:24,680 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:37:24,680 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:37:24,680 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:37:24,680 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:37:24,680 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_83efae8a-ca35-4d7d-921d-84a99040f572/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 98b440d2018d3020f67dce8008e7aad4265ed1f1 [2021-10-16 02:37:24,923 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:37:24,955 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:37:24,958 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:37:24,959 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:37:24,960 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:37:24,961 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/array-fpi/s4iff.c [2021-10-16 02:37:25,075 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/data/b67366af6/3a11e100bddf4931b5227d4bdb8400fc/FLAG46e89d0de [2021-10-16 02:37:25,571 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:37:25,572 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/sv-benchmarks/c/array-fpi/s4iff.c [2021-10-16 02:37:25,579 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/data/b67366af6/3a11e100bddf4931b5227d4bdb8400fc/FLAG46e89d0de [2021-10-16 02:37:25,939 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/data/b67366af6/3a11e100bddf4931b5227d4bdb8400fc [2021-10-16 02:37:25,944 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:37:25,947 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:37:25,948 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:37:25,949 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:37:25,953 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:37:25,955 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:37:25" (1/1) ... [2021-10-16 02:37:25,958 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5376f19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:37:25, skipping insertion in model container [2021-10-16 02:37:25,958 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:37:25" (1/1) ... [2021-10-16 02:37:25,966 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:37:25,994 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:37:26,116 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_83efae8a-ca35-4d7d-921d-84a99040f572/sv-benchmarks/c/array-fpi/s4iff.c[588,601] [2021-10-16 02:37:26,134 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:37:26,141 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:37:26,154 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_83efae8a-ca35-4d7d-921d-84a99040f572/sv-benchmarks/c/array-fpi/s4iff.c[588,601] [2021-10-16 02:37:26,162 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:37:26,174 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:37:26,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:37:26 WrapperNode [2021-10-16 02:37:26,174 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:37:26,175 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:37:26,175 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:37:26,176 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:37:26,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:37:26" (1/1) ... [2021-10-16 02:37:26,191 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:37:26" (1/1) ... [2021-10-16 02:37:26,213 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:37:26,214 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:37:26,214 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:37:26,214 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:37:26,222 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:37:26" (1/1) ... [2021-10-16 02:37:26,223 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:37:26" (1/1) ... [2021-10-16 02:37:26,225 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:37:26" (1/1) ... [2021-10-16 02:37:26,225 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:37:26" (1/1) ... [2021-10-16 02:37:26,232 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:37:26" (1/1) ... [2021-10-16 02:37:26,236 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:37:26" (1/1) ... [2021-10-16 02:37:26,237 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:37:26" (1/1) ... [2021-10-16 02:37:26,240 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:37:26,241 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:37:26,241 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:37:26,241 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:37:26,242 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:37:26" (1/1) ... [2021-10-16 02:37:26,250 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:37:26,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:37:26,278 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:37:26,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:37:26,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 02:37:26,341 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:37:26,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-16 02:37:26,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-16 02:37:26,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:37:26,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:37:26,344 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-16 02:37:26,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 02:37:26,859 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:37:26,859 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-16 02:37:26,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:37:26 BoogieIcfgContainer [2021-10-16 02:37:26,862 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:37:26,864 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:37:26,864 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:37:26,875 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:37:26,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:37:25" (1/3) ... [2021-10-16 02:37:26,876 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b33791d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:37:26, skipping insertion in model container [2021-10-16 02:37:26,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:37:26" (2/3) ... [2021-10-16 02:37:26,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b33791d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:37:26, skipping insertion in model container [2021-10-16 02:37:26,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:37:26" (3/3) ... [2021-10-16 02:37:26,878 INFO L111 eAbstractionObserver]: Analyzing ICFG s4iff.c [2021-10-16 02:37:26,897 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:37:26,897 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:37:26,945 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:37:26,953 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 02:37:26,953 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 02:37:26,968 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 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 02:37:26,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-16 02:37:26,974 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:37:26,974 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-16 02:37:26,975 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:37:26,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:37:26,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1569409207, now seen corresponding path program 1 times [2021-10-16 02:37:26,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:37:26,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417312071] [2021-10-16 02:37:26,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:37:26,994 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:37:27,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:37:27,231 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 02:37:27,231 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:37:27,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417312071] [2021-10-16 02:37:27,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417312071] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:37:27,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:37:27,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:37:27,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434061586] [2021-10-16 02:37:27,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:37:27,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:37:27,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:37:27,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:37:27,263 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 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 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:37:27,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:37:27,302 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2021-10-16 02:37:27,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:37:27,305 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-16 02:37:27,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:37:27,315 INFO L225 Difference]: With dead ends: 18 [2021-10-16 02:37:27,316 INFO L226 Difference]: Without dead ends: 8 [2021-10-16 02:37:27,320 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:37:27,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-10-16 02:37:27,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-10-16 02:37:27,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:37:27,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-10-16 02:37:27,366 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2021-10-16 02:37:27,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:37:27,367 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-10-16 02:37:27,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:37:27,368 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-10-16 02:37:27,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-16 02:37:27,369 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:37:27,369 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:37:27,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 02:37:27,369 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:37:27,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:37:27,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1413550180, now seen corresponding path program 1 times [2021-10-16 02:37:27,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:37:27,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489133119] [2021-10-16 02:37:27,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:37:27,375 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:37:27,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:37:27,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:37:27,507 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:37:27,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489133119] [2021-10-16 02:37:27,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489133119] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:37:27,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:37:27,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 02:37:27,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736097240] [2021-10-16 02:37:27,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:37:27,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:37:27,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:37:27,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:37:27,516 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 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 02:37:27,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:37:27,572 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2021-10-16 02:37:27,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:37:27,573 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-10-16 02:37:27,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:37:27,573 INFO L225 Difference]: With dead ends: 12 [2021-10-16 02:37:27,573 INFO L226 Difference]: Without dead ends: 9 [2021-10-16 02:37:27,574 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:37:27,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-10-16 02:37:27,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-10-16 02:37:27,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:37:27,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-10-16 02:37:27,577 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2021-10-16 02:37:27,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:37:27,578 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-10-16 02:37:27,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 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 02:37:27,578 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-10-16 02:37:27,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 02:37:27,578 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:37:27,579 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:37:27,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-16 02:37:27,579 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:37:27,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:37:27,580 INFO L82 PathProgramCache]: Analyzing trace with hash -870274037, now seen corresponding path program 1 times [2021-10-16 02:37:27,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:37:27,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020942326] [2021-10-16 02:37:27,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:37:27,581 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:37:27,608 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:37:27,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [759743240] [2021-10-16 02:37:27,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:37:27,613 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:37:27,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:37:27,621 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:37:27,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 02:37:27,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:37:27,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-16 02:37:27,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:37:27,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 02:37:27,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-16 02:37:27,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-10-16 02:37:28,108 INFO L354 Elim1Store]: treesize reduction 39, result has 15.2 percent of original size [2021-10-16 02:37:28,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 27 [2021-10-16 02:37:28,245 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-16 02:37:28,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 40 [2021-10-16 02:37:28,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:37:28,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:37:28,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:37:28,670 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:37:28,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020942326] [2021-10-16 02:37:28,671 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:37:28,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759743240] [2021-10-16 02:37:28,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759743240] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:37:28,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1215495084] [2021-10-16 02:37:28,709 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-16 02:37:28,709 INFO L166 IcfgInterpreter]: Building call graph [2021-10-16 02:37:28,714 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-16 02:37:28,720 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-16 02:37:28,721 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-16 02:37:28,754 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:37:28,755 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:37:28,756 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:37:28,757 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-16 02:37:28,758 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:37:28,759 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:37:28,760 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-16 02:37:28,763 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-10-16 02:37:28,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:37:28,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:37:28,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:37:28,837 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-10-16 02:37:28,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 43 treesize of output 42 [2021-10-16 02:37:28,839 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:37:28,842 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-16 02:37:28,844 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:37:28,845 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-16 02:37:28,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-16 02:37:28,847 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:37:28,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:37:28,887 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:37:28,890 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 108 [2021-10-16 02:37:28,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-16 02:37:28,892 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:124, output treesize:108 [2021-10-16 02:37:28,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:37:29,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:37:29,101 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#length_17| 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 02:37:29,106 INFO L168 Benchmark]: Toolchain (without parser) took 3158.35 ms. Allocated memory was 107.0 MB in the beginning and 140.5 MB in the end (delta: 33.6 MB). Free memory was 70.7 MB in the beginning and 104.6 MB in the end (delta: -33.9 MB). Peak memory consumption was 278.7 kB. Max. memory is 16.1 GB. [2021-10-16 02:37:29,106 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 86.0 MB. Free memory is still 64.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:37:29,107 INFO L168 Benchmark]: CACSL2BoogieTranslator took 226.18 ms. Allocated memory is still 107.0 MB. Free memory was 70.5 MB in the beginning and 60.4 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:37:29,107 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.88 ms. Allocated memory is still 107.0 MB. Free memory was 60.2 MB in the beginning and 58.7 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:37:29,108 INFO L168 Benchmark]: Boogie Preprocessor took 26.33 ms. Allocated memory is still 107.0 MB. Free memory was 58.7 MB in the beginning and 57.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:37:29,109 INFO L168 Benchmark]: RCFGBuilder took 621.44 ms. Allocated memory is still 107.0 MB. Free memory was 57.5 MB in the beginning and 42.9 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-16 02:37:29,109 INFO L168 Benchmark]: TraceAbstraction took 2240.72 ms. Allocated memory was 107.0 MB in the beginning and 140.5 MB in the end (delta: 33.6 MB). Free memory was 42.5 MB in the beginning and 104.6 MB in the end (delta: -62.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:37:29,113 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 86.0 MB. Free memory is still 64.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 226.18 ms. Allocated memory is still 107.0 MB. Free memory was 70.5 MB in the beginning and 60.4 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.88 ms. Allocated memory is still 107.0 MB. Free memory was 60.2 MB in the beginning and 58.7 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.33 ms. Allocated memory is still 107.0 MB. Free memory was 58.7 MB in the beginning and 57.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 621.44 ms. Allocated memory is still 107.0 MB. Free memory was 57.5 MB in the beginning and 42.9 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2240.72 ms. Allocated memory was 107.0 MB in the beginning and 140.5 MB in the end (delta: 33.6 MB). Free memory was 42.5 MB in the beginning and 104.6 MB in the end (delta: -62.1 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_#length_17| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#length_17|: 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 02:37:29,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:37:31,630 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:37:31,633 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:37:31,695 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:37:31,695 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:37:31,700 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:37:31,705 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:37:31,711 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:37:31,715 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:37:31,725 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:37:31,727 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:37:31,729 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:37:31,730 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:37:31,732 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:37:31,735 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:37:31,738 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:37:31,740 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:37:31,741 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:37:31,747 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:37:31,749 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:37:31,755 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:37:31,757 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:37:31,760 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:37:31,762 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:37:31,769 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:37:31,770 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:37:31,770 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:37:31,773 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:37:31,773 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:37:31,775 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:37:31,775 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:37:31,776 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:37:31,778 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:37:31,779 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:37:31,781 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:37:31,781 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:37:31,782 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:37:31,783 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:37:31,783 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:37:31,785 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:37:31,786 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:37:31,787 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-16 02:37:31,833 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:37:31,833 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:37:31,835 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:37:31,835 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:37:31,836 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:37:31,836 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:37:31,836 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:37:31,836 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:37:31,836 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:37:31,838 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:37:31,839 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:37:31,839 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:37:31,840 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:37:31,840 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:37:31,840 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:37:31,840 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:37:31,840 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:37:31,841 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 02:37:31,841 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 02:37:31,841 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:37:31,841 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:37:31,842 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:37:31,842 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:37:31,842 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:37:31,842 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 02:37:31,842 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:37:31,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:37:31,843 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:37:31,843 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:37:31,843 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:37:31,844 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 02:37:31,844 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 02:37:31,844 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:37:31,844 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:37:31,845 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:37:31,845 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_83efae8a-ca35-4d7d-921d-84a99040f572/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 98b440d2018d3020f67dce8008e7aad4265ed1f1 [2021-10-16 02:37:32,245 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:37:32,287 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:37:32,290 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:37:32,291 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:37:32,292 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:37:32,293 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/array-fpi/s4iff.c [2021-10-16 02:37:32,389 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/data/df12b64eb/1a853fe1f3dd4d3b945f52680a0f5897/FLAGc31125dbf [2021-10-16 02:37:33,020 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:37:33,021 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/sv-benchmarks/c/array-fpi/s4iff.c [2021-10-16 02:37:33,031 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/data/df12b64eb/1a853fe1f3dd4d3b945f52680a0f5897/FLAGc31125dbf [2021-10-16 02:37:33,403 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/data/df12b64eb/1a853fe1f3dd4d3b945f52680a0f5897 [2021-10-16 02:37:33,406 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:37:33,409 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:37:33,411 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:37:33,411 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:37:33,415 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:37:33,416 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:37:33" (1/1) ... [2021-10-16 02:37:33,417 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@127c7ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:37:33, skipping insertion in model container [2021-10-16 02:37:33,417 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:37:33" (1/1) ... [2021-10-16 02:37:33,425 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:37:33,444 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:37:33,609 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_83efae8a-ca35-4d7d-921d-84a99040f572/sv-benchmarks/c/array-fpi/s4iff.c[588,601] [2021-10-16 02:37:33,635 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:37:33,648 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:37:33,659 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_83efae8a-ca35-4d7d-921d-84a99040f572/sv-benchmarks/c/array-fpi/s4iff.c[588,601] [2021-10-16 02:37:33,671 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:37:33,703 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:37:33,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:37:33 WrapperNode [2021-10-16 02:37:33,704 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:37:33,705 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:37:33,705 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:37:33,705 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:37:33,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:37:33" (1/1) ... [2021-10-16 02:37:33,743 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:37:33" (1/1) ... [2021-10-16 02:37:33,766 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:37:33,767 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:37:33,767 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:37:33,767 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:37:33,776 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:37:33" (1/1) ... [2021-10-16 02:37:33,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:37:33" (1/1) ... [2021-10-16 02:37:33,781 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:37:33" (1/1) ... [2021-10-16 02:37:33,781 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:37:33" (1/1) ... [2021-10-16 02:37:33,790 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:37:33" (1/1) ... [2021-10-16 02:37:33,794 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:37:33" (1/1) ... [2021-10-16 02:37:33,796 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:37:33" (1/1) ... [2021-10-16 02:37:33,800 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:37:33,801 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:37:33,801 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:37:33,801 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:37:33,802 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:37:33" (1/1) ... [2021-10-16 02:37:33,810 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:37:33,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:37:33,838 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:37:33,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:37:33,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 02:37:33,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:37:33,890 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-10-16 02:37:33,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-16 02:37:33,891 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-16 02:37:33,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:37:33,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:37:33,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-10-16 02:37:33,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 02:37:33,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-16 02:37:34,234 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:37:34,235 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-16 02:37:34,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:37:34 BoogieIcfgContainer [2021-10-16 02:37:34,237 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:37:34,239 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:37:34,240 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:37:34,243 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:37:34,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:37:33" (1/3) ... [2021-10-16 02:37:34,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e828cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:37:34, skipping insertion in model container [2021-10-16 02:37:34,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:37:33" (2/3) ... [2021-10-16 02:37:34,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e828cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:37:34, skipping insertion in model container [2021-10-16 02:37:34,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:37:34" (3/3) ... [2021-10-16 02:37:34,247 INFO L111 eAbstractionObserver]: Analyzing ICFG s4iff.c [2021-10-16 02:37:34,253 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:37:34,253 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:37:34,324 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:37:34,346 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 02:37:34,346 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 02:37:34,403 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:37:34,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-16 02:37:34,408 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:37:34,409 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:37:34,410 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:37:34,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:37:34,416 INFO L82 PathProgramCache]: Analyzing trace with hash 356661439, now seen corresponding path program 1 times [2021-10-16 02:37:34,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:37:34,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [784892379] [2021-10-16 02:37:34,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:37:34,432 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:37:34,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:37:34,435 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:37:34,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 02:37:34,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:37:34,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-16 02:37:34,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:37:34,610 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 02:37:34,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:37:34,652 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 02:37:34,653 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:37:34,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [784892379] [2021-10-16 02:37:34,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [784892379] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:37:34,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:37:34,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-16 02:37:34,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894260130] [2021-10-16 02:37:34,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-16 02:37:34,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:37:34,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-16 02:37:34,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 02:37:34,680 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:37:34,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:37:34,695 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2021-10-16 02:37:34,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-16 02:37:34,696 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-16 02:37:34,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:37:34,705 INFO L225 Difference]: With dead ends: 34 [2021-10-16 02:37:34,705 INFO L226 Difference]: Without dead ends: 15 [2021-10-16 02:37:34,708 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 02:37:34,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-10-16 02:37:34,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-10-16 02:37:34,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:37:34,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-10-16 02:37:34,740 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2021-10-16 02:37:34,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:37:34,741 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-10-16 02:37:34,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:37:34,742 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-10-16 02:37:34,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-16 02:37:34,742 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:37:34,743 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:37:34,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:37:34,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:37:34,958 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:37:34,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:37:34,959 INFO L82 PathProgramCache]: Analyzing trace with hash -452685187, now seen corresponding path program 1 times [2021-10-16 02:37:34,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:37:34,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [409954059] [2021-10-16 02:37:34,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:37:34,960 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:37:34,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:37:34,961 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:37:34,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 02:37:35,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:37:35,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:37:35,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:37:35,347 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 02:37:35,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:37:35,501 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 02:37:35,501 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:37:35,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [409954059] [2021-10-16 02:37:35,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [409954059] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:37:35,502 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:37:35,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-16 02:37:35,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684746123] [2021-10-16 02:37:35,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:37:35,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:37:35,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:37:35,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:37:35,512 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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 02:37:36,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:37:36,034 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2021-10-16 02:37:36,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 02:37:36,035 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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) Word has length 11 [2021-10-16 02:37:36,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:37:36,036 INFO L225 Difference]: With dead ends: 28 [2021-10-16 02:37:36,036 INFO L226 Difference]: Without dead ends: 20 [2021-10-16 02:37:36,037 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 242.2ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-10-16 02:37:36,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-16 02:37:36,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2021-10-16 02:37:36,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:37:36,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-10-16 02:37:36,042 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-10-16 02:37:36,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:37:36,043 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-10-16 02:37:36,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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 02:37:36,043 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-10-16 02:37:36,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-16 02:37:36,044 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:37:36,044 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:37:36,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:37:36,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:37:36,245 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:37:36,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:37:36,246 INFO L82 PathProgramCache]: Analyzing trace with hash 623611495, now seen corresponding path program 1 times [2021-10-16 02:37:36,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:37:36,247 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1891019586] [2021-10-16 02:37:36,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:37:36,248 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:37:36,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:37:36,250 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:37:36,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 02:37:36,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:37:36,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-16 02:37:36,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:37:36,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:37:36,560 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-10-16 02:37:36,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2021-10-16 02:37:36,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2021-10-16 02:37:36,696 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-16 02:37:36,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2021-10-16 02:37:37,379 INFO L354 Elim1Store]: treesize reduction 134, result has 13.5 percent of original size [2021-10-16 02:37:37,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 53 [2021-10-16 02:37:37,740 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-10-16 02:37:37,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 102 treesize of output 68 [2021-10-16 02:37:37,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:37:37,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:37:43,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-16 02:37:43,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-16 02:37:43,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-16 02:37:43,274 INFO L354 Elim1Store]: treesize reduction 87, result has 26.3 percent of original size [2021-10-16 02:37:43,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 837 treesize of output 531 [2021-10-16 02:37:43,304 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-16 02:37:43,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 531 treesize of output 509 [2021-10-16 02:37:43,331 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-16 02:37:43,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 669 treesize of output 663 [2021-10-16 02:37:43,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 651 treesize of output 649 [2021-10-16 02:37:43,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 643 treesize of output 641 [2021-10-16 02:37:43,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:37:43,776 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:37:43,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1891019586] [2021-10-16 02:37:43,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1891019586] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:37:43,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1799984391] [2021-10-16 02:37:43,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:37:43,777 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:37:43,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:37:43,786 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:37:43,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-10-16 02:37:43,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:37:43,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-16 02:37:43,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:37:44,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:37:44,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:37:44,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 21 [2021-10-16 02:37:44,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-16 02:37:44,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:37:44,477 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-10-16 02:37:44,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 42 [2021-10-16 02:37:45,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:37:45,731 INFO L354 Elim1Store]: treesize reduction 31, result has 18.4 percent of original size [2021-10-16 02:37:45,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 90 treesize of output 55 [2021-10-16 02:37:46,170 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-16 02:37:46,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 118 treesize of output 90 [2021-10-16 02:37:46,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:37:46,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:37:46,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-16 02:37:46,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-16 02:37:46,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-16 02:37:46,920 INFO L354 Elim1Store]: treesize reduction 17, result has 63.0 percent of original size [2021-10-16 02:37:46,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 184 treesize of output 136 [2021-10-16 02:37:46,942 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-16 02:37:46,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 126 [2021-10-16 02:37:46,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 82 [2021-10-16 02:37:47,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:37:47,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1799984391] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:37:47,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854761804] [2021-10-16 02:37:47,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:37:47,067 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:37:47,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:37:47,074 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:37:47,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-16 02:37:47,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:37:47,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-16 02:37:47,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:37:47,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:37:47,306 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-10-16 02:37:47,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2021-10-16 02:37:47,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-10-16 02:37:47,385 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-16 02:37:47,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2021-10-16 02:37:47,927 INFO L354 Elim1Store]: treesize reduction 280, result has 10.3 percent of original size [2021-10-16 02:37:47,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 107 treesize of output 67 [2021-10-16 02:37:48,266 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-10-16 02:37:48,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 102 treesize of output 68 [2021-10-16 02:37:48,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:37:48,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:38:02,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-16 02:38:02,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-16 02:38:02,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-16 02:38:02,364 INFO L354 Elim1Store]: treesize reduction 110, result has 32.5 percent of original size [2021-10-16 02:38:02,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 3048 treesize of output 1595 [2021-10-16 02:38:02,399 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-16 02:38:02,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1595 treesize of output 1493 [2021-10-16 02:38:02,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2355 treesize of output 2061 [2021-10-16 02:38:02,480 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-16 02:38:02,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1027 treesize of output 989 [2021-10-16 02:38:02,525 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-16 02:38:02,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1309 treesize of output 1303 [2021-10-16 02:38:02,576 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-16 02:38:02,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1291 treesize of output 1285 [2021-10-16 02:38:02,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1273 treesize of output 1271 [2021-10-16 02:38:02,613 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-16 02:38:02,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 341 treesize of output 339 [2021-10-16 02:38:02,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:38:02,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854761804] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:38:02,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:38:02,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10, 10, 11, 11] total 33 [2021-10-16 02:38:02,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419363511] [2021-10-16 02:38:02,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-16 02:38:02,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:38:02,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-16 02:38:02,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=843, Unknown=8, NotChecked=0, Total=1056 [2021-10-16 02:38:02,904 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 33 states, 33 states have (on average 1.606060606060606) internal successors, (53), 33 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:38:10,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:38:10,854 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2021-10-16 02:38:10,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-16 02:38:10,855 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.606060606060606) internal successors, (53), 33 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-16 02:38:10,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:38:10,866 INFO L225 Difference]: With dead ends: 35 [2021-10-16 02:38:10,866 INFO L226 Difference]: Without dead ends: 26 [2021-10-16 02:38:10,868 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 25688.1ms TimeCoverageRelationStatistics Valid=386, Invalid=1498, Unknown=8, NotChecked=0, Total=1892 [2021-10-16 02:38:10,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-16 02:38:10,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2021-10-16 02:38:10,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:38:10,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-10-16 02:38:10,873 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 16 [2021-10-16 02:38:10,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:38:10,873 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-10-16 02:38:10,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.606060606060606) internal successors, (53), 33 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:38:10,874 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-10-16 02:38:10,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-16 02:38:10,875 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:38:10,875 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:38:10,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-10-16 02:38:11,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-16 02:38:11,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-10-16 02:38:11,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:38:11,479 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:38:11,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:38:11,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1137819675, now seen corresponding path program 2 times [2021-10-16 02:38:11,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:38:11,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [155028391] [2021-10-16 02:38:11,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:38:11,481 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:38:11,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:38:11,482 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:38:11,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-16 02:38:11,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:38:11,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:38:11,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-16 02:38:11,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:38:12,167 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:38:12,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:38:12,512 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:38:12,512 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:38:12,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [155028391] [2021-10-16 02:38:12,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [155028391] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:38:12,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1981325306] [2021-10-16 02:38:12,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:38:12,513 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:38:12,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:38:12,528 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:38:12,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-10-16 02:38:12,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:38:12,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:38:12,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-16 02:38:12,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:38:13,060 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:38:13,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:38:13,214 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:38:13,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1981325306] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:38:13,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341069442] [2021-10-16 02:38:13,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:38:13,216 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:38:13,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:38:13,216 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:38:13,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-16 02:38:13,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:38:13,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:38:13,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:38:13,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:38:13,685 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:38:13,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:38:13,840 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:38:13,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341069442] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:38:13,840 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:38:13,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 11, 9, 9, 7] total 22 [2021-10-16 02:38:13,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352282073] [2021-10-16 02:38:13,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-16 02:38:13,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:38:13,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-16 02:38:13,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-10-16 02:38:13,842 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 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 02:38:15,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:38:15,540 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2021-10-16 02:38:15,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-16 02:38:15,541 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 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 02:38:15,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:38:15,542 INFO L225 Difference]: With dead ends: 54 [2021-10-16 02:38:15,542 INFO L226 Difference]: Without dead ends: 47 [2021-10-16 02:38:15,543 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1033.9ms TimeCoverageRelationStatistics Valid=325, Invalid=797, Unknown=0, NotChecked=0, Total=1122 [2021-10-16 02:38:15,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-16 02:38:15,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 35. [2021-10-16 02:38:15,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 states have internal predecessors, (42), 0 states have call successors, (0), 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 02:38:15,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2021-10-16 02:38:15,552 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 18 [2021-10-16 02:38:15,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:38:15,552 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2021-10-16 02:38:15,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 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 02:38:15,552 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2021-10-16 02:38:15,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-16 02:38:15,553 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:38:15,554 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:38:15,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-10-16 02:38:15,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-16 02:38:15,982 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-10-16 02:38:16,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:38:16,176 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:38:16,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:38:16,177 INFO L82 PathProgramCache]: Analyzing trace with hash -479454913, now seen corresponding path program 3 times [2021-10-16 02:38:16,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:38:16,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1789959503] [2021-10-16 02:38:16,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:38:16,177 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:38:16,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:38:16,178 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:38:16,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-16 02:38:16,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-16 02:38:16,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:38:16,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:38:16,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:38:16,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:38:16,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:38:16,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:38:16,868 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:38:16,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1789959503] [2021-10-16 02:38:16,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1789959503] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:38:16,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [495910622] [2021-10-16 02:38:16,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:38:16,869 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:38:16,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:38:16,872 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:38:16,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-10-16 02:38:17,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-16 02:38:17,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:38:17,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:38:17,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:38:17,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:38:17,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:38:17,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:38:17,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [495910622] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:38:17,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409864106] [2021-10-16 02:38:17,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:38:17,430 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:38:17,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:38:17,431 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:38:17,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-16 02:38:17,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-16 02:38:17,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:38:17,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:38:17,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:38:17,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:38:17,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:38:17,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:38:17,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409864106] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:38:17,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:38:17,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 9, 7, 9, 7] total 14 [2021-10-16 02:38:17,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557419120] [2021-10-16 02:38:17,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-16 02:38:17,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:38:17,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-16 02:38:17,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-10-16 02:38:17,927 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:38:18,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:38:18,684 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2021-10-16 02:38:18,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-16 02:38:18,685 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-16 02:38:18,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:38:18,686 INFO L225 Difference]: With dead ends: 46 [2021-10-16 02:38:18,686 INFO L226 Difference]: Without dead ends: 34 [2021-10-16 02:38:18,686 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 491.4ms TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2021-10-16 02:38:18,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-16 02:38:18,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-10-16 02:38:18,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:38:18,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2021-10-16 02:38:18,693 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 19 [2021-10-16 02:38:18,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:38:18,694 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2021-10-16 02:38:18,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:38:18,694 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2021-10-16 02:38:18,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-16 02:38:18,696 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:38:18,697 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:38:18,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-10-16 02:38:18,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-16 02:38:19,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-16 02:38:19,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:38:19,300 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:38:19,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:38:19,300 INFO L82 PathProgramCache]: Analyzing trace with hash 634982145, now seen corresponding path program 4 times [2021-10-16 02:38:19,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:38:19,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1323031003] [2021-10-16 02:38:19,301 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-16 02:38:19,301 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:38:19,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:38:19,302 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:38:19,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-16 02:38:19,648 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-16 02:38:19,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-16 02:38:19,648 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-16 02:38:19,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 02:38:19,792 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-16 02:38:19,792 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-16 02:38:19,793 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:38:19,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-16 02:38:19,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:38:20,002 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 02:38:20,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:38:20 BoogieIcfgContainer [2021-10-16 02:38:20,065 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 02:38:20,065 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 02:38:20,065 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 02:38:20,066 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 02:38:20,066 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:37:34" (3/4) ... [2021-10-16 02:38:20,068 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-16 02:38:20,130 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83efae8a-ca35-4d7d-921d-84a99040f572/bin/utaipan-mTDlp9Zugs/witness.graphml [2021-10-16 02:38:20,130 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 02:38:20,131 INFO L168 Benchmark]: Toolchain (without parser) took 46721.75 ms. Allocated memory was 62.9 MB in the beginning and 94.4 MB in the end (delta: 31.5 MB). Free memory was 43.6 MB in the beginning and 60.8 MB in the end (delta: -17.2 MB). Peak memory consumption was 14.6 MB. Max. memory is 16.1 GB. [2021-10-16 02:38:20,131 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 62.9 MB. Free memory is still 44.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:38:20,132 INFO L168 Benchmark]: CACSL2BoogieTranslator took 293.48 ms. Allocated memory is still 62.9 MB. Free memory was 43.4 MB in the beginning and 47.2 MB in the end (delta: -3.8 MB). Peak memory consumption was 14.0 MB. Max. memory is 16.1 GB. [2021-10-16 02:38:20,135 INFO L168 Benchmark]: Boogie Procedure Inliner took 61.25 ms. Allocated memory is still 62.9 MB. Free memory was 47.2 MB in the beginning and 45.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:38:20,136 INFO L168 Benchmark]: Boogie Preprocessor took 33.15 ms. Allocated memory is still 62.9 MB. Free memory was 45.5 MB in the beginning and 44.3 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:38:20,137 INFO L168 Benchmark]: RCFGBuilder took 436.71 ms. Allocated memory is still 62.9 MB. Free memory was 44.1 MB in the beginning and 33.0 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:38:20,137 INFO L168 Benchmark]: TraceAbstraction took 45825.29 ms. Allocated memory was 62.9 MB in the beginning and 94.4 MB in the end (delta: 31.5 MB). Free memory was 32.4 MB in the beginning and 64.1 MB in the end (delta: -31.7 MB). Peak memory consumption was 628.8 kB. Max. memory is 16.1 GB. [2021-10-16 02:38:20,138 INFO L168 Benchmark]: Witness Printer took 64.69 ms. Allocated memory is still 94.4 MB. Free memory was 64.1 MB in the beginning and 60.8 MB in the end (delta: 3.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:38:20,140 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 62.9 MB. Free memory is still 44.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 293.48 ms. Allocated memory is still 62.9 MB. Free memory was 43.4 MB in the beginning and 47.2 MB in the end (delta: -3.8 MB). Peak memory consumption was 14.0 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 61.25 ms. Allocated memory is still 62.9 MB. Free memory was 47.2 MB in the beginning and 45.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 33.15 ms. Allocated memory is still 62.9 MB. Free memory was 45.5 MB in the beginning and 44.3 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 436.71 ms. Allocated memory is still 62.9 MB. Free memory was 44.1 MB in the beginning and 33.0 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 45825.29 ms. Allocated memory was 62.9 MB in the beginning and 94.4 MB in the end (delta: 31.5 MB). Free memory was 32.4 MB in the beginning and 64.1 MB in the end (delta: -31.7 MB). Peak memory consumption was 628.8 kB. Max. memory is 16.1 GB. * Witness Printer took 64.69 ms. Allocated memory is still 94.4 MB. Free memory was 64.1 MB in the beginning and 60.8 MB in the end (delta: 3.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; VAL [N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) VAL [N=2] [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] sum[0] = 1 [L32] i=0 VAL [N=2] [L32] COND TRUE i