./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-properties/list-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-properties/list-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8 --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 6ba4928d27614bbdf140b58cd6ad1ef338e79461 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-properties/list-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8 --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 6ba4928d27614bbdf140b58cd6ad1ef338e79461 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 08:09:13,523 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 08:09:13,527 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 08:09:13,576 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 08:09:13,577 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 08:09:13,578 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 08:09:13,581 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 08:09:13,583 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 08:09:13,586 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 08:09:13,587 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 08:09:13,588 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 08:09:13,590 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 08:09:13,591 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 08:09:13,592 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 08:09:13,595 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 08:09:13,597 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 08:09:13,598 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 08:09:13,600 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 08:09:13,603 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 08:09:13,606 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 08:09:13,609 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 08:09:13,611 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 08:09:13,613 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 08:09:13,614 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 08:09:13,619 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 08:09:13,620 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 08:09:13,621 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 08:09:13,623 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 08:09:13,624 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 08:09:13,625 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 08:09:13,626 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 08:09:13,628 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 08:09:13,629 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 08:09:13,630 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 08:09:13,632 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 08:09:13,633 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 08:09:13,634 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 08:09:13,634 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 08:09:13,635 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 08:09:13,637 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 08:09:13,638 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 08:09:13,639 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 08:09:13,678 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 08:09:13,678 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 08:09:13,685 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 08:09:13,686 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 08:09:13,687 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 08:09:13,687 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 08:09:13,687 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 08:09:13,688 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 08:09:13,688 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 08:09:13,688 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 08:09:13,697 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 08:09:13,698 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 08:09:13,698 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 08:09:13,698 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 08:09:13,699 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 08:09:13,700 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 08:09:13,700 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 08:09:13,700 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 08:09:13,700 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 08:09:13,701 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 08:09:13,701 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 08:09:13,701 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 08:09:13,702 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 08:09:13,702 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 08:09:13,703 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 08:09:13,703 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 08:09:13,703 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 08:09:13,704 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 08:09:13,704 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 08:09:13,706 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 08:09:13,706 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:09:13,707 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 08:09:13,707 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 08:09:13,708 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 08:09:13,708 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 08:09:13,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 08:09:13,709 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 08:09:13,709 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 08:09:13,709 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 08:09:13,709 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_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6ba4928d27614bbdf140b58cd6ad1ef338e79461 [2021-10-13 08:09:14,132 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 08:09:14,166 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 08:09:14,169 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 08:09:14,171 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 08:09:14,172 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 08:09:14,173 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/list-properties/list-1.i [2021-10-13 08:09:14,282 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/data/4d9774af5/fbf9cf78fcd64dbf9b2b7ea6430b9f3c/FLAG0f9d4f4ed [2021-10-13 08:09:15,053 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 08:09:15,054 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/sv-benchmarks/c/list-properties/list-1.i [2021-10-13 08:09:15,093 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/data/4d9774af5/fbf9cf78fcd64dbf9b2b7ea6430b9f3c/FLAG0f9d4f4ed [2021-10-13 08:09:15,353 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/data/4d9774af5/fbf9cf78fcd64dbf9b2b7ea6430b9f3c [2021-10-13 08:09:15,357 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 08:09:15,360 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 08:09:15,364 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 08:09:15,364 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 08:09:15,369 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 08:09:15,370 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:09:15" (1/1) ... [2021-10-13 08:09:15,373 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4eb1611e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:15, skipping insertion in model container [2021-10-13 08:09:15,373 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:09:15" (1/1) ... [2021-10-13 08:09:15,382 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 08:09:15,454 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 08:09:15,979 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_099ea63c-e305-447a-b3fe-4aa0a18fd72a/sv-benchmarks/c/list-properties/list-1.i[23408,23421] [2021-10-13 08:09:15,983 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:09:15,993 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 08:09:16,068 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_099ea63c-e305-447a-b3fe-4aa0a18fd72a/sv-benchmarks/c/list-properties/list-1.i[23408,23421] [2021-10-13 08:09:16,069 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:09:16,103 INFO L208 MainTranslator]: Completed translation [2021-10-13 08:09:16,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:16 WrapperNode [2021-10-13 08:09:16,104 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 08:09:16,105 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 08:09:16,106 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 08:09:16,106 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 08:09:16,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:16" (1/1) ... [2021-10-13 08:09:16,135 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:16" (1/1) ... [2021-10-13 08:09:16,172 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 08:09:16,173 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 08:09:16,174 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 08:09:16,174 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 08:09:16,184 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:16" (1/1) ... [2021-10-13 08:09:16,184 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:16" (1/1) ... [2021-10-13 08:09:16,189 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:16" (1/1) ... [2021-10-13 08:09:16,190 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:16" (1/1) ... [2021-10-13 08:09:16,199 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:16" (1/1) ... [2021-10-13 08:09:16,204 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:16" (1/1) ... [2021-10-13 08:09:16,206 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:16" (1/1) ... [2021-10-13 08:09:16,210 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 08:09:16,227 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 08:09:16,228 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 08:09:16,228 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 08:09:16,229 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:16" (1/1) ... [2021-10-13 08:09:16,238 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:09:16,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:09:16,269 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 08:09:16,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 08:09:16,325 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 08:09:16,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 08:09:16,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 08:09:16,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 08:09:16,327 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 08:09:16,327 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 08:09:16,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 08:09:16,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 08:09:16,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 08:09:16,893 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 08:09:16,899 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2021-10-13 08:09:16,902 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:09:16 BoogieIcfgContainer [2021-10-13 08:09:16,902 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 08:09:16,905 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 08:09:16,909 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 08:09:16,913 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 08:09:16,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:09:15" (1/3) ... [2021-10-13 08:09:16,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d8675ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:09:16, skipping insertion in model container [2021-10-13 08:09:16,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:16" (2/3) ... [2021-10-13 08:09:16,917 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d8675ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:09:16, skipping insertion in model container [2021-10-13 08:09:16,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:09:16" (3/3) ... [2021-10-13 08:09:16,919 INFO L111 eAbstractionObserver]: Analyzing ICFG list-1.i [2021-10-13 08:09:16,927 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 08:09:16,927 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 08:09:17,004 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 08:09:17,011 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 [2021-10-13 08:09:17,011 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 08:09:17,029 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.65) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:09:17,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 08:09:17,051 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:09:17,052 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:09:17,053 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:09:17,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:09:17,066 INFO L82 PathProgramCache]: Analyzing trace with hash -315335576, now seen corresponding path program 1 times [2021-10-13 08:09:17,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:09:17,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605888945] [2021-10-13 08:09:17,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:09:17,083 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:09:17,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:09:17,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:09:17,326 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:09:17,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605888945] [2021-10-13 08:09:17,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605888945] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:09:17,328 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:09:17,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 08:09:17,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694556054] [2021-10-13 08:09:17,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 08:09:17,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:09:17,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 08:09:17,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 08:09:17,366 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.65) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:09:17,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:09:17,387 INFO L93 Difference]: Finished difference Result 37 states and 55 transitions. [2021-10-13 08:09:17,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 08:09:17,390 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-13 08:09:17,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:09:17,400 INFO L225 Difference]: With dead ends: 37 [2021-10-13 08:09:17,401 INFO L226 Difference]: Without dead ends: 17 [2021-10-13 08:09:17,405 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 08:09:17,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-13 08:09:17,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-10-13 08:09:17,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:09:17,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-10-13 08:09:17,445 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 10 [2021-10-13 08:09:17,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:09:17,446 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-10-13 08:09:17,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:09:17,448 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-10-13 08:09:17,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 08:09:17,449 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:09:17,449 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:09:17,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 08:09:17,450 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:09:17,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:09:17,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1189814048, now seen corresponding path program 1 times [2021-10-13 08:09:17,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:09:17,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347916500] [2021-10-13 08:09:17,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:09:17,456 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:09:17,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:09:17,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:09:17,894 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:09:17,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347916500] [2021-10-13 08:09:17,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347916500] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:09:17,895 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:09:17,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 08:09:17,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11317414] [2021-10-13 08:09:17,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 08:09:17,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:09:17,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 08:09:17,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-13 08:09:17,899 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:09:18,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:09:18,026 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2021-10-13 08:09:18,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 08:09:18,027 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2021-10-13 08:09:18,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:09:18,029 INFO L225 Difference]: With dead ends: 40 [2021-10-13 08:09:18,031 INFO L226 Difference]: Without dead ends: 36 [2021-10-13 08:09:18,033 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 74.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 08:09:18,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-13 08:09:18,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 26. [2021-10-13 08:09:18,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:09:18,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-10-13 08:09:18,055 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 14 [2021-10-13 08:09:18,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:09:18,055 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-10-13 08:09:18,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:09:18,056 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-10-13 08:09:18,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 08:09:18,059 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:09:18,060 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:09:18,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 08:09:18,064 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:09:18,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:09:18,065 INFO L82 PathProgramCache]: Analyzing trace with hash -901323109, now seen corresponding path program 1 times [2021-10-13 08:09:18,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:09:18,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459810251] [2021-10-13 08:09:18,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:09:18,069 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:09:18,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:09:18,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:09:18,367 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:09:18,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459810251] [2021-10-13 08:09:18,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459810251] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:09:18,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:09:18,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 08:09:18,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892014485] [2021-10-13 08:09:18,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 08:09:18,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:09:18,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 08:09:18,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-13 08:09:18,370 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:09:18,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:09:18,534 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2021-10-13 08:09:18,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 08:09:18,535 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-13 08:09:18,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:09:18,538 INFO L225 Difference]: With dead ends: 42 [2021-10-13 08:09:18,538 INFO L226 Difference]: Without dead ends: 34 [2021-10-13 08:09:18,539 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 70.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 08:09:18,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-13 08:09:18,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 24. [2021-10-13 08:09:18,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:09:18,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-10-13 08:09:18,550 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 16 [2021-10-13 08:09:18,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:09:18,551 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-10-13 08:09:18,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:09:18,551 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-10-13 08:09:18,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 08:09:18,552 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:09:18,553 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:09:18,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 08:09:18,553 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:09:18,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:09:18,554 INFO L82 PathProgramCache]: Analyzing trace with hash 123379867, now seen corresponding path program 1 times [2021-10-13 08:09:18,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:09:18,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258588284] [2021-10-13 08:09:18,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:09:18,556 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:09:18,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:09:18,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:09:18,766 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:09:18,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258588284] [2021-10-13 08:09:18,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258588284] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:09:18,772 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:09:18,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 08:09:18,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274501136] [2021-10-13 08:09:18,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 08:09:18,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:09:18,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 08:09:18,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-13 08:09:18,774 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:09:18,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:09:18,880 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2021-10-13 08:09:18,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 08:09:18,881 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-13 08:09:18,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:09:18,882 INFO L225 Difference]: With dead ends: 42 [2021-10-13 08:09:18,883 INFO L226 Difference]: Without dead ends: 31 [2021-10-13 08:09:18,885 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 58.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 08:09:18,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-13 08:09:18,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 21. [2021-10-13 08:09:18,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:09:18,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-10-13 08:09:18,896 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 16 [2021-10-13 08:09:18,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:09:18,897 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-10-13 08:09:18,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:09:18,898 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-10-13 08:09:18,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 08:09:18,899 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:09:18,899 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:09:18,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-13 08:09:18,899 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:09:18,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:09:18,900 INFO L82 PathProgramCache]: Analyzing trace with hash 437878735, now seen corresponding path program 1 times [2021-10-13 08:09:18,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:09:18,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830888785] [2021-10-13 08:09:18,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:09:18,902 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:09:18,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:09:19,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:09:19,235 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:09:19,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830888785] [2021-10-13 08:09:19,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830888785] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 08:09:19,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989327113] [2021-10-13 08:09:19,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:09:19,237 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:09:19,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:09:19,243 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:09:19,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 08:09:19,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:09:19,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-13 08:09:19,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:09:19,481 INFO L354 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2021-10-13 08:09:19,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 15 treesize of output 31 [2021-10-13 08:09:20,683 INFO L354 Elim1Store]: treesize reduction 44, result has 45.7 percent of original size [2021-10-13 08:09:20,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 36 treesize of output 62 [2021-10-13 08:09:20,789 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 [2021-10-13 08:09:20,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-10-13 08:09:20,919 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 08:09:20,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-10-13 08:09:21,081 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-10-13 08:09:21,082 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 32 treesize of output 23 [2021-10-13 08:09:21,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:09:21,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:09:21,810 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~p~0.offset Int)) (= 2 (select (select (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) ULTIMATE.start_main_~p~0.offset 3)) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) is different from false [2021-10-13 08:09:21,853 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:09:21,867 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-10-13 08:09:30,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 220 treesize of output 212 [2021-10-13 08:09:31,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-10-13 08:09:31,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989327113] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:09:31,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [813107353] [2021-10-13 08:09:31,076 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-10-13 08:09:31,077 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 08:09:31,083 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 08:09:31,091 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 08:09:31,096 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 08:09:31,147 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:09:31,149 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 08:09:31,150 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:09:31,151 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-13 08:09:31,152 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 08:09:31,153 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:09:31,153 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-13 08:09:31,156 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 119 [2021-10-13 08:09:31,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:09:31,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:09:31,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:09:31,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-13 08:09:31,196 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:09:31,197 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 08:09:31,198 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:09:31,199 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 08:09:31,199 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 08:09:31,202 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 08:09:31,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:09:31,231 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:09:31,233 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 119 [2021-10-13 08:09:31,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 08:09:31,236 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:116, output treesize:119 [2021-10-13 08:09:31,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 08:09:31,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:09:31,452 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#valid_20| 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) [2021-10-13 08:09:31,455 INFO L168 Benchmark]: Toolchain (without parser) took 16094.35 ms. Allocated memory was 96.5 MB in the beginning and 148.9 MB in the end (delta: 52.4 MB). Free memory was 64.0 MB in the beginning and 72.9 MB in the end (delta: -8.9 MB). Peak memory consumption was 44.0 MB. Max. memory is 16.1 GB. [2021-10-13 08:09:31,456 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 96.5 MB. Free memory is still 49.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:09:31,456 INFO L168 Benchmark]: CACSL2BoogieTranslator took 740.92 ms. Allocated memory is still 96.5 MB. Free memory was 64.0 MB in the beginning and 66.0 MB in the end (delta: -2.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 08:09:31,457 INFO L168 Benchmark]: Boogie Procedure Inliner took 67.19 ms. Allocated memory is still 96.5 MB. Free memory was 66.0 MB in the beginning and 64.1 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:09:31,457 INFO L168 Benchmark]: Boogie Preprocessor took 53.24 ms. Allocated memory is still 96.5 MB. Free memory was 64.1 MB in the beginning and 62.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:09:31,458 INFO L168 Benchmark]: RCFGBuilder took 675.20 ms. Allocated memory is still 96.5 MB. Free memory was 62.5 MB in the beginning and 49.2 MB in the end (delta: 13.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-13 08:09:31,459 INFO L168 Benchmark]: TraceAbstraction took 14549.33 ms. Allocated memory was 96.5 MB in the beginning and 148.9 MB in the end (delta: 52.4 MB). Free memory was 48.8 MB in the beginning and 72.9 MB in the end (delta: -24.1 MB). Peak memory consumption was 31.9 MB. Max. memory is 16.1 GB. [2021-10-13 08:09:31,462 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 96.5 MB. Free memory is still 49.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 740.92 ms. Allocated memory is still 96.5 MB. Free memory was 64.0 MB in the beginning and 66.0 MB in the end (delta: -2.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 67.19 ms. Allocated memory is still 96.5 MB. Free memory was 66.0 MB in the beginning and 64.1 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 53.24 ms. Allocated memory is still 96.5 MB. Free memory was 64.1 MB in the beginning and 62.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 675.20 ms. Allocated memory is still 96.5 MB. Free memory was 62.5 MB in the beginning and 49.2 MB in the end (delta: 13.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 14549.33 ms. Allocated memory was 96.5 MB in the beginning and 148.9 MB in the end (delta: 52.4 MB). Free memory was 48.8 MB in the beginning and 72.9 MB in the end (delta: -24.1 MB). Peak memory consumption was 31.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#valid_20| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_20|: 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. [2021-10-13 08:09:31,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 08:09:34,575 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 08:09:34,577 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 08:09:34,615 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 08:09:34,617 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 08:09:34,619 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 08:09:34,623 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 08:09:34,630 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 08:09:34,634 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 08:09:34,636 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 08:09:34,639 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 08:09:34,643 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 08:09:34,644 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 08:09:34,652 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 08:09:34,656 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 08:09:34,665 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 08:09:34,668 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 08:09:34,671 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 08:09:34,677 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 08:09:34,680 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 08:09:34,688 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 08:09:34,690 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 08:09:34,692 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 08:09:34,694 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 08:09:34,699 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 08:09:34,704 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 08:09:34,705 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 08:09:34,707 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 08:09:34,709 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 08:09:34,711 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 08:09:34,711 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 08:09:34,712 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 08:09:34,715 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 08:09:34,716 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 08:09:34,718 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 08:09:34,719 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 08:09:34,720 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 08:09:34,720 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 08:09:34,721 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 08:09:34,723 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 08:09:34,724 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 08:09:34,725 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 08:09:34,758 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 08:09:34,759 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 08:09:34,760 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 08:09:34,760 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 08:09:34,760 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 08:09:34,761 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 08:09:34,761 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 08:09:34,761 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 08:09:34,761 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 08:09:34,762 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 08:09:34,763 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 08:09:34,763 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 08:09:34,766 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 08:09:34,767 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 08:09:34,767 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 08:09:34,768 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 08:09:34,768 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 08:09:34,768 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 08:09:34,769 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 08:09:34,769 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 08:09:34,769 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 08:09:34,769 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 08:09:34,770 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 08:09:34,771 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 08:09:34,771 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 08:09:34,771 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 08:09:34,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:09:34,772 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 08:09:34,773 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 08:09:34,773 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 08:09:34,773 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 08:09:34,774 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 08:09:34,774 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 08:09:34,774 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 08:09:34,775 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 08:09:34,775 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_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6ba4928d27614bbdf140b58cd6ad1ef338e79461 [2021-10-13 08:09:35,288 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 08:09:35,325 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 08:09:35,330 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 08:09:35,333 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 08:09:35,334 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 08:09:35,336 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/list-properties/list-1.i [2021-10-13 08:09:35,432 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/data/3a10e3634/f6921ebbb2164cbd86e745ebaa3d1c07/FLAG0496c25b4 [2021-10-13 08:09:36,200 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 08:09:36,201 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/sv-benchmarks/c/list-properties/list-1.i [2021-10-13 08:09:36,214 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/data/3a10e3634/f6921ebbb2164cbd86e745ebaa3d1c07/FLAG0496c25b4 [2021-10-13 08:09:36,495 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/data/3a10e3634/f6921ebbb2164cbd86e745ebaa3d1c07 [2021-10-13 08:09:36,499 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 08:09:36,501 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 08:09:36,509 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 08:09:36,509 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 08:09:36,514 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 08:09:36,516 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:09:36" (1/1) ... [2021-10-13 08:09:36,518 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@713b8247 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:36, skipping insertion in model container [2021-10-13 08:09:36,518 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:09:36" (1/1) ... [2021-10-13 08:09:36,527 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 08:09:36,589 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 08:09:36,965 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_099ea63c-e305-447a-b3fe-4aa0a18fd72a/sv-benchmarks/c/list-properties/list-1.i[23408,23421] [2021-10-13 08:09:36,969 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:09:36,986 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 08:09:37,078 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_099ea63c-e305-447a-b3fe-4aa0a18fd72a/sv-benchmarks/c/list-properties/list-1.i[23408,23421] [2021-10-13 08:09:37,079 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:09:37,134 INFO L208 MainTranslator]: Completed translation [2021-10-13 08:09:37,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:37 WrapperNode [2021-10-13 08:09:37,135 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 08:09:37,136 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 08:09:37,136 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 08:09:37,137 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 08:09:37,146 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:37" (1/1) ... [2021-10-13 08:09:37,187 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:37" (1/1) ... [2021-10-13 08:09:37,215 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 08:09:37,216 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 08:09:37,217 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 08:09:37,217 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 08:09:37,226 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:37" (1/1) ... [2021-10-13 08:09:37,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:37" (1/1) ... [2021-10-13 08:09:37,232 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:37" (1/1) ... [2021-10-13 08:09:37,232 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:37" (1/1) ... [2021-10-13 08:09:37,246 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:37" (1/1) ... [2021-10-13 08:09:37,251 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:37" (1/1) ... [2021-10-13 08:09:37,254 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:37" (1/1) ... [2021-10-13 08:09:37,258 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 08:09:37,259 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 08:09:37,259 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 08:09:37,260 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 08:09:37,260 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:37" (1/1) ... [2021-10-13 08:09:37,268 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:09:37,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:09:37,296 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 08:09:37,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 08:09:37,356 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 08:09:37,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 08:09:37,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 08:09:37,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 08:09:37,357 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 08:09:37,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 08:09:37,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 08:09:37,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 08:09:37,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 08:09:37,843 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 08:09:37,843 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2021-10-13 08:09:37,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:09:37 BoogieIcfgContainer [2021-10-13 08:09:37,846 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 08:09:37,848 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 08:09:37,848 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 08:09:37,851 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 08:09:37,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:09:36" (1/3) ... [2021-10-13 08:09:37,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35659e00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:09:37, skipping insertion in model container [2021-10-13 08:09:37,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:37" (2/3) ... [2021-10-13 08:09:37,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35659e00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:09:37, skipping insertion in model container [2021-10-13 08:09:37,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:09:37" (3/3) ... [2021-10-13 08:09:37,855 INFO L111 eAbstractionObserver]: Analyzing ICFG list-1.i [2021-10-13 08:09:37,862 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 08:09:37,862 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 08:09:37,922 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 08:09:37,929 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 [2021-10-13 08:09:37,930 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 08:09:37,947 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:09:37,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 08:09:37,954 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:09:37,955 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:09:37,955 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:09:37,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:09:37,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1354617612, now seen corresponding path program 1 times [2021-10-13 08:09:37,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:09:37,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1183591400] [2021-10-13 08:09:37,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:09:37,992 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:09:37,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:09:38,007 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:09:38,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 08:09:38,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:09:38,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 08:09:38,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:09:38,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:09:38,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:09:38,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:09:38,333 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:09:38,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1183591400] [2021-10-13 08:09:38,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1183591400] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:09:38,335 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:09:38,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 08:09:38,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568859358] [2021-10-13 08:09:38,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 08:09:38,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:09:38,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 08:09:38,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 08:09:38,384 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:09:38,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:09:38,407 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2021-10-13 08:09:38,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 08:09:38,410 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-13 08:09:38,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:09:38,420 INFO L225 Difference]: With dead ends: 43 [2021-10-13 08:09:38,420 INFO L226 Difference]: Without dead ends: 19 [2021-10-13 08:09:38,425 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 08:09:38,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-10-13 08:09:38,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-10-13 08:09:38,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:09:38,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-10-13 08:09:38,468 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 12 [2021-10-13 08:09:38,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:09:38,469 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-10-13 08:09:38,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:09:38,470 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-10-13 08:09:38,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 08:09:38,471 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:09:38,471 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:09:38,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 08:09:38,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:09:38,697 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:09:38,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:09:38,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1712942958, now seen corresponding path program 1 times [2021-10-13 08:09:38,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:09:38,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1319966611] [2021-10-13 08:09:38,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:09:38,706 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:09:38,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:09:38,708 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:09:38,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 08:09:38,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:09:38,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 08:09:38,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:09:38,976 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 [2021-10-13 08:09:39,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2021-10-13 08:09:39,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:09:39,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:09:39,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 25 treesize of output 21 [2021-10-13 08:09:39,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:09:39,160 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:09:39,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1319966611] [2021-10-13 08:09:39,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1319966611] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:09:39,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:09:39,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-10-13 08:09:39,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717268412] [2021-10-13 08:09:39,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 08:09:39,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:09:39,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 08:09:39,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 08:09:39,165 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:09:39,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:09:39,416 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2021-10-13 08:09:39,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 08:09:39,416 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2021-10-13 08:09:39,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:09:39,419 INFO L225 Difference]: With dead ends: 42 [2021-10-13 08:09:39,420 INFO L226 Difference]: Without dead ends: 38 [2021-10-13 08:09:39,421 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 64.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-13 08:09:39,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-13 08:09:39,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 26. [2021-10-13 08:09:39,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:09:39,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-10-13 08:09:39,434 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 14 [2021-10-13 08:09:39,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:09:39,434 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-10-13 08:09:39,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:09:39,435 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-10-13 08:09:39,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 08:09:39,436 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:09:39,436 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:09:39,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 08:09:39,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:09:39,652 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:09:39,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:09:39,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1214384489, now seen corresponding path program 1 times [2021-10-13 08:09:39,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:09:39,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1769777045] [2021-10-13 08:09:39,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:09:39,654 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:09:39,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:09:39,661 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:09:39,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 08:09:39,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:09:39,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 08:09:39,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:09:39,915 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 [2021-10-13 08:09:39,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2021-10-13 08:09:39,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:09:39,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:09:40,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 12 [2021-10-13 08:09:40,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:09:40,135 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:09:40,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1769777045] [2021-10-13 08:09:40,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1769777045] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:09:40,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:09:40,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-10-13 08:09:40,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692207533] [2021-10-13 08:09:40,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 08:09:40,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:09:40,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 08:09:40,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-13 08:09:40,145 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:09:40,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:09:40,465 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2021-10-13 08:09:40,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 08:09:40,466 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-13 08:09:40,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:09:40,467 INFO L225 Difference]: With dead ends: 44 [2021-10-13 08:09:40,467 INFO L226 Difference]: Without dead ends: 36 [2021-10-13 08:09:40,468 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 115.1ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-10-13 08:09:40,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-13 08:09:40,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 24. [2021-10-13 08:09:40,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:09:40,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-10-13 08:09:40,474 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 16 [2021-10-13 08:09:40,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:09:40,474 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-10-13 08:09:40,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:09:40,475 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-10-13 08:09:40,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 08:09:40,476 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:09:40,476 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:09:40,499 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-10-13 08:09:40,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:09:40,691 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:09:40,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:09:40,692 INFO L82 PathProgramCache]: Analyzing trace with hash -2055879831, now seen corresponding path program 1 times [2021-10-13 08:09:40,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:09:40,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1742485878] [2021-10-13 08:09:40,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:09:40,693 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:09:40,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:09:40,698 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:09:40,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 08:09:40,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:09:40,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 08:09:40,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:09:40,908 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 [2021-10-13 08:09:40,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2021-10-13 08:09:40,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:09:40,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:09:41,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 12 [2021-10-13 08:09:41,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:09:41,109 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:09:41,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1742485878] [2021-10-13 08:09:41,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1742485878] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:09:41,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:09:41,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-10-13 08:09:41,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535233649] [2021-10-13 08:09:41,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 08:09:41,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:09:41,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 08:09:41,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-13 08:09:41,115 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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) [2021-10-13 08:09:41,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:09:41,346 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2021-10-13 08:09:41,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 08:09:41,348 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-13 08:09:41,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:09:41,349 INFO L225 Difference]: With dead ends: 44 [2021-10-13 08:09:41,349 INFO L226 Difference]: Without dead ends: 33 [2021-10-13 08:09:41,350 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 97.7ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-10-13 08:09:41,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-13 08:09:41,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 21. [2021-10-13 08:09:41,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:09:41,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-10-13 08:09:41,355 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 16 [2021-10-13 08:09:41,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:09:41,355 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-10-13 08:09:41,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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) [2021-10-13 08:09:41,356 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-10-13 08:09:41,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 08:09:41,357 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:09:41,357 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:09:41,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 08:09:41,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:09:41,573 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:09:41,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:09:41,573 INFO L82 PathProgramCache]: Analyzing trace with hash -2002180578, now seen corresponding path program 1 times [2021-10-13 08:09:41,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:09:41,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [267831705] [2021-10-13 08:09:41,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:09:41,574 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:09:41,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:09:41,576 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:09:41,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 08:09:41,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:09:41,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 08:09:41,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:09:41,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-13 08:09:41,876 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 [2021-10-13 08:09:41,904 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 08:09:41,905 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 19 treesize of output 19 [2021-10-13 08:09:42,026 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-13 08:09:42,028 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 1 case distinctions, treesize of input 27 treesize of output 11 [2021-10-13 08:09:42,147 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 08:09:42,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-10-13 08:09:42,335 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 08:09:42,337 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 26 treesize of output 14 [2021-10-13 08:09:42,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:09:42,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:09:48,559 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:09:48,561 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-10-13 08:09:52,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 121 treesize of output 117 [2021-10-13 08:09:53,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:09:53,199 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:09:53,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [267831705] [2021-10-13 08:09:53,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [267831705] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:09:53,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1917832694] [2021-10-13 08:09:53,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:09:53,200 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:09:53,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:09:53,207 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:09:53,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-10-13 08:09:53,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:09:53,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 08:09:53,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:09:53,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-13 08:09:53,684 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 [2021-10-13 08:09:53,717 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 08:09:53,718 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 24 treesize of output 24 [2021-10-13 08:09:53,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:09:53,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-13 08:09:53,988 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 08:09:53,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-10-13 08:09:54,210 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 08:09:54,210 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 26 treesize of output 14 [2021-10-13 08:09:54,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:09:54,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:09:54,309 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:09:54,312 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-10-13 08:09:56,329 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_2 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_41 (_ BitVec 32))) (= (_ bv2 32) (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_2)))) (store .cse0 c_ULTIMATE.start_main_~t~0.base (store (select .cse0 c_ULTIMATE.start_main_~t~0.base) v_ULTIMATE.start_main_~p~0.offset_41 (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) is different from false [2021-10-13 08:09:56,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 447 treesize of output 431 [2021-10-13 08:09:56,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:09:56,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1917832694] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:09:56,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405662636] [2021-10-13 08:09:56,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:09:56,820 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:09:56,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:09:56,822 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:09:56,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-13 08:09:56,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:09:56,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 08:09:57,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:09:57,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-13 08:09:57,099 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 [2021-10-13 08:09:57,125 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 08:09:57,125 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 19 treesize of output 19 [2021-10-13 08:09:57,200 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-13 08:09:57,201 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 1 case distinctions, treesize of input 27 treesize of output 11 [2021-10-13 08:09:57,261 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 08:09:57,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-10-13 08:09:57,399 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 08:09:57,400 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 26 treesize of output 14 [2021-10-13 08:09:57,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:09:57,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:09:57,482 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:09:57,483 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-10-13 08:10:07,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 120 treesize of output 116 [2021-10-13 08:10:08,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:10:08,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405662636] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:10:08,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:10:08,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 18 [2021-10-13 08:10:08,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413843601] [2021-10-13 08:10:08,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 08:10:08,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:10:08,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 08:10:08,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=218, Unknown=6, NotChecked=30, Total=306 [2021-10-13 08:10:08,073 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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) [2021-10-13 08:10:17,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:10:17,050 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2021-10-13 08:10:17,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 08:10:17,051 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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) Word has length 17 [2021-10-13 08:10:17,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:10:17,051 INFO L225 Difference]: With dead ends: 57 [2021-10-13 08:10:17,052 INFO L226 Difference]: Without dead ends: 53 [2021-10-13 08:10:17,052 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 68 SyntacticMatches, 13 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 27407.0ms TimeCoverageRelationStatistics Valid=81, Invalid=336, Unknown=7, NotChecked=38, Total=462 [2021-10-13 08:10:17,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-10-13 08:10:17,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 29. [2021-10-13 08:10:17,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:10:17,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-10-13 08:10:17,059 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 17 [2021-10-13 08:10:17,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:10:17,059 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-10-13 08:10:17,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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) [2021-10-13 08:10:17,060 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-10-13 08:10:17,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 08:10:17,061 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:10:17,061 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:10:17,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-13 08:10:17,271 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-10-13 08:10:17,463 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2021-10-13 08:10:17,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 08:10:17,662 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:10:17,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:10:17,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1915231737, now seen corresponding path program 1 times [2021-10-13 08:10:17,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:10:17,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [603066637] [2021-10-13 08:10:17,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:10:17,664 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:10:17,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:10:17,665 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:10:17,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 08:10:17,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:10:17,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 08:10:17,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:10:17,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-13 08:10:17,957 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 08:10:17,958 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 19 treesize of output 19 [2021-10-13 08:10:17,970 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 [2021-10-13 08:10:18,079 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-13 08:10:18,079 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 1 case distinctions, treesize of input 27 treesize of output 11 [2021-10-13 08:10:18,169 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 08:10:18,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-10-13 08:10:18,244 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 08:10:18,244 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 26 treesize of output 14 [2021-10-13 08:10:18,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:10:18,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:10:23,591 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:10:23,592 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-10-13 08:10:25,611 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_4 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_55 (_ BitVec 32))) (= (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_4)))) (store .cse0 c_ULTIMATE.start_main_~t~0.base (store (select .cse0 c_ULTIMATE.start_main_~t~0.base) v_ULTIMATE.start_main_~p~0.offset_55 (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset) (_ bv1 32))) is different from false [2021-10-13 08:10:25,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 117 treesize of output 113 [2021-10-13 08:10:27,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:10:27,909 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:10:27,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [603066637] [2021-10-13 08:10:27,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [603066637] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:10:27,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1164046494] [2021-10-13 08:10:27,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:10:27,909 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:10:27,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:10:27,910 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:10:27,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-10-13 08:10:28,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:10:28,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 08:10:28,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:10:28,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-13 08:10:28,357 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 08:10:28,358 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 18 treesize of output 18 [2021-10-13 08:10:28,386 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 [2021-10-13 08:10:28,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:10:28,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-13 08:10:28,649 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 08:10:28,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-10-13 08:10:28,754 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 08:10:28,755 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 26 treesize of output 14 [2021-10-13 08:10:28,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:10:28,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:10:28,844 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:10:28,845 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-10-13 08:10:30,860 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_5 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_62 (_ BitVec 32))) (= (_ bv1 32) (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_5)))) (store .cse0 c_ULTIMATE.start_main_~t~0.base (store (select .cse0 c_ULTIMATE.start_main_~t~0.base) v_ULTIMATE.start_main_~p~0.offset_62 (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) is different from false [2021-10-13 08:10:30,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 220 treesize of output 212 [2021-10-13 08:10:31,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:10:31,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1164046494] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:10:31,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102670430] [2021-10-13 08:10:31,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:10:31,213 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:10:31,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:10:31,216 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:10:31,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-13 08:10:31,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:10:31,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 08:10:31,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:10:31,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-13 08:10:31,523 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 08:10:31,524 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 19 treesize of output 19 [2021-10-13 08:10:31,536 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 [2021-10-13 08:10:31,610 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-13 08:10:31,611 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 1 case distinctions, treesize of input 27 treesize of output 11 [2021-10-13 08:10:31,677 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 08:10:31,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-10-13 08:10:31,738 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 08:10:31,738 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 26 treesize of output 14 [2021-10-13 08:10:31,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:10:31,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:10:31,824 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:10:31,825 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-10-13 08:10:34,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 220 treesize of output 212 [2021-10-13 08:10:34,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:10:34,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102670430] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:10:34,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:10:34,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 19 [2021-10-13 08:10:34,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799946644] [2021-10-13 08:10:34,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 08:10:34,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:10:34,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 08:10:34,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=220, Unknown=6, NotChecked=62, Total=342 [2021-10-13 08:10:34,945 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:05,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:11:05,504 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2021-10-13 08:11:05,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 08:11:05,505 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-13 08:11:05,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:11:05,506 INFO L225 Difference]: With dead ends: 51 [2021-10-13 08:11:05,506 INFO L226 Difference]: Without dead ends: 45 [2021-10-13 08:11:05,507 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 67 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 19403.3ms TimeCoverageRelationStatistics Valid=114, Invalid=394, Unknown=6, NotChecked=86, Total=600 [2021-10-13 08:11:05,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-10-13 08:11:05,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 35. [2021-10-13 08:11:05,513 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) [2021-10-13 08:11:05,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2021-10-13 08:11:05,514 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 17 [2021-10-13 08:11:05,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:11:05,514 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2021-10-13 08:11:05,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:05,515 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2021-10-13 08:11:05,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 08:11:05,516 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:11:05,516 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:11:05,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 08:11:05,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-13 08:11:05,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-10-13 08:11:06,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 08:11:06,131 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:11:06,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:11:06,132 INFO L82 PathProgramCache]: Analyzing trace with hash 98489369, now seen corresponding path program 1 times [2021-10-13 08:11:06,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:11:06,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1037871661] [2021-10-13 08:11:06,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:11:06,132 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:11:06,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:11:06,133 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:11:06,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-13 08:11:06,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:11:06,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 08:11:06,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:11:06,528 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 13 treesize of output 9 [2021-10-13 08:11:06,560 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 13 treesize of output 9 [2021-10-13 08:11:06,714 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-10-13 08:11:06,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 75 [2021-10-13 08:11:06,719 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 66 treesize of output 58 [2021-10-13 08:11:06,742 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-10-13 08:11:06,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 44 [2021-10-13 08:11:06,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 44 treesize of output 36 [2021-10-13 08:11:06,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 33 treesize of output 21 [2021-10-13 08:11:07,054 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 08:11:07,055 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 22 treesize of output 14 [2021-10-13 08:11:07,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:11:07,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:11:07,395 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:11:07,396 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 108 treesize of output 111 [2021-10-13 08:11:07,402 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:11:07,408 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-10-13 08:11:07,412 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:11:07,414 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-10-13 08:11:07,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 129 treesize of output 123 [2021-10-13 08:11:07,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 269 treesize of output 257 [2021-10-13 08:11:08,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:11:08,330 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:11:08,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1037871661] [2021-10-13 08:11:08,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1037871661] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:11:08,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1523243920] [2021-10-13 08:11:08,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:11:08,331 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:11:08,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:11:08,336 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:11:08,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-10-13 08:11:08,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:11:08,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 08:11:08,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:11:08,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-13 08:11:08,936 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 08:11:08,937 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 20 treesize of output 20 [2021-10-13 08:11:09,103 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 18 treesize of output 14 [2021-10-13 08:11:09,137 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 13 treesize of output 9 [2021-10-13 08:11:09,344 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-10-13 08:11:09,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 79 [2021-10-13 08:11:09,350 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 74 treesize of output 66 [2021-10-13 08:11:09,378 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-10-13 08:11:09,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 52 [2021-10-13 08:11:09,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 45 treesize of output 33 [2021-10-13 08:11:09,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 30 treesize of output 18 [2021-10-13 08:11:09,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2021-10-13 08:11:09,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:11:09,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:11:09,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 93 treesize of output 77 [2021-10-13 08:11:09,827 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:11:09,829 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-10-13 08:11:09,832 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:11:09,835 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-10-13 08:11:10,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 83 treesize of output 77 [2021-10-13 08:11:10,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:11:10,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:11:12,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:11:12,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1523243920] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:11:12,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890723382] [2021-10-13 08:11:12,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:11:12,692 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:11:12,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:11:12,693 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:11:12,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-13 08:11:12,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:11:12,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 08:11:12,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:11:12,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-13 08:11:13,118 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 08:11:13,119 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 19 treesize of output 19 [2021-10-13 08:11:13,244 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 13 treesize of output 9 [2021-10-13 08:11:13,261 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 18 treesize of output 14 [2021-10-13 08:11:13,443 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-10-13 08:11:13,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 72 [2021-10-13 08:11:13,449 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 67 treesize of output 59 [2021-10-13 08:11:13,480 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-10-13 08:11:13,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 49 [2021-10-13 08:11:13,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 38 treesize of output 26 [2021-10-13 08:11:13,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 15 [2021-10-13 08:11:13,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2021-10-13 08:11:13,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:11:13,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:11:13,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 93 treesize of output 77 [2021-10-13 08:11:13,787 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:11:13,792 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-10-13 08:11:13,795 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:11:13,795 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-10-13 08:11:13,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 200 treesize of output 188 [2021-10-13 08:11:14,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:11:14,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:11:14,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 08:11:18,219 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:11:18,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890723382] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:11:18,219 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:11:18,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9, 9, 9, 9] total 34 [2021-10-13 08:11:18,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364639643] [2021-10-13 08:11:18,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-13 08:11:18,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:11:18,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-13 08:11:18,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=947, Unknown=2, NotChecked=0, Total=1122 [2021-10-13 08:11:18,223 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 34 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:21,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:11:21,044 INFO L93 Difference]: Finished difference Result 72 states and 85 transitions. [2021-10-13 08:11:21,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-13 08:11:21,052 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 34 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-13 08:11:21,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:11:21,053 INFO L225 Difference]: With dead ends: 72 [2021-10-13 08:11:21,053 INFO L226 Difference]: Without dead ends: 56 [2021-10-13 08:11:21,056 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 73 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 9248.6ms TimeCoverageRelationStatistics Valid=459, Invalid=1989, Unknown=2, NotChecked=0, Total=2450 [2021-10-13 08:11:21,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-10-13 08:11:21,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 37. [2021-10-13 08:11:21,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.25) internal successors, (45), 36 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) [2021-10-13 08:11:21,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2021-10-13 08:11:21,070 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 19 [2021-10-13 08:11:21,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:11:21,071 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2021-10-13 08:11:21,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 34 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:21,071 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2021-10-13 08:11:21,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 08:11:21,072 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:11:21,073 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:11:21,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-10-13 08:11:21,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-13 08:11:21,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-10-13 08:11:21,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:11:21,674 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:11:21,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:11:21,674 INFO L82 PathProgramCache]: Analyzing trace with hash 2059776366, now seen corresponding path program 2 times [2021-10-13 08:11:21,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:11:21,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1757624779] [2021-10-13 08:11:21,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:11:21,675 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:11:21,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:11:21,676 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:11:21,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-13 08:11:21,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:11:21,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:11:21,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 08:11:21,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:11:22,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-13 08:11:22,140 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 08:11:22,140 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 20 treesize of output 20 [2021-10-13 08:11:22,164 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 [2021-10-13 08:11:22,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:11:22,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-13 08:11:22,307 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 [2021-10-13 08:11:22,451 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-10-13 08:11:22,451 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 3 case distinctions, treesize of input 38 treesize of output 25 [2021-10-13 08:11:22,680 INFO L354 Elim1Store]: treesize reduction 40, result has 40.3 percent of original size [2021-10-13 08:11:22,680 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 3 case distinctions, treesize of input 30 treesize of output 44 [2021-10-13 08:11:23,911 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 08:11:23,911 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 26 treesize of output 14 [2021-10-13 08:11:23,948 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:11:23,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:11:26,167 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~p~0.base (_ BitVec 32))) (let ((.cse0 (select (select (store |c_#memory_int| ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset (_ bv3 32))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= .cse0 (_ bv2 32)) (= .cse0 (_ bv3 32))))) is different from false [2021-10-13 08:11:26,195 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:11:26,196 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-10-13 08:11:28,224 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~p~0.base_95 (_ BitVec 32)) (v_DerPreprocessor_13 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_13)))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_95 (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_95) c_ULTIMATE.start_main_~t~0.offset (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= (_ bv3 32) .cse0) (= (_ bv2 32) .cse0)))) is different from false [2021-10-13 08:11:30,293 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~p~0.base_95 (_ BitVec 32)) (ULTIMATE.start_main_~p~0.offset (_ BitVec 32)) (v_DerPreprocessor_13 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) ULTIMATE.start_main_~p~0.offset (_ bv2 32)) (bvadd ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_13)))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_95 (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_95) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= .cse0 (_ bv2 32)) (= .cse0 (_ bv3 32))))) is different from false [2021-10-13 08:11:30,309 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:11:30,310 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-10-13 08:11:32,344 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~p~0.offset_102 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_95 (_ BitVec 32)) (v_DerPreprocessor_13 (_ BitVec 32)) (v_DerPreprocessor_14 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (let ((.cse2 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_14)))) (store .cse2 c_ULTIMATE.start_main_~t~0.base (store (store (select .cse2 c_ULTIMATE.start_main_~t~0.base) v_ULTIMATE.start_main_~p~0.offset_102 (_ bv2 32)) (bvadd v_ULTIMATE.start_main_~p~0.offset_102 (_ bv4 32)) v_DerPreprocessor_13))))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_95 (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_95) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= (_ bv2 32) .cse0) (= (_ bv3 32) .cse0)))) is different from false [2021-10-13 08:11:32,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 3683 treesize of output 3651 [2021-10-13 08:11:55,239 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2021-10-13 08:11:55,239 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:11:55,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1757624779] [2021-10-13 08:11:55,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1757624779] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:11:55,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1709542993] [2021-10-13 08:11:55,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:11:55,240 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:11:55,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:11:55,243 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:11:55,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-10-13 08:11:55,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:11:55,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:11:55,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 08:11:55,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:11:55,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-13 08:11:55,939 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 [2021-10-13 08:11:55,966 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 08:11:55,966 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 19 treesize of output 19 [2021-10-13 08:11:56,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:11:56,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-13 08:11:56,059 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 [2021-10-13 08:11:56,160 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-10-13 08:11:56,161 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 3 case distinctions, treesize of input 38 treesize of output 25 [2021-10-13 08:11:56,358 INFO L354 Elim1Store]: treesize reduction 40, result has 40.3 percent of original size [2021-10-13 08:11:56,359 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 3 case distinctions, treesize of input 30 treesize of output 44 [2021-10-13 08:11:57,581 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 08:11:57,581 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 26 treesize of output 14 [2021-10-13 08:11:57,592 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:11:57,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:11:57,688 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:11:57,690 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-10-13 08:11:59,720 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~p~0.base_104 (_ BitVec 32)) (v_DerPreprocessor_15 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_15)))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_104 (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_104) c_ULTIMATE.start_main_~t~0.offset (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= (_ bv3 32) .cse0) (= (_ bv2 32) .cse0)))) is different from false [2021-10-13 08:12:01,773 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~p~0.offset (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_104 (_ BitVec 32)) (v_DerPreprocessor_15 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) ULTIMATE.start_main_~p~0.offset (_ bv2 32)) (bvadd ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_15)))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_104 (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_104) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= .cse0 (_ bv2 32)) (= .cse0 (_ bv3 32))))) is different from false [2021-10-13 08:12:01,792 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:12:01,800 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-10-13 08:12:03,833 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~p~0.offset_111 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_104 (_ BitVec 32)) (v_DerPreprocessor_15 (_ BitVec 32)) (v_DerPreprocessor_16 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (let ((.cse2 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_16)))) (store .cse2 c_ULTIMATE.start_main_~t~0.base (store (store (select .cse2 c_ULTIMATE.start_main_~t~0.base) v_ULTIMATE.start_main_~p~0.offset_111 (_ bv2 32)) (bvadd v_ULTIMATE.start_main_~p~0.offset_111 (_ bv4 32)) v_DerPreprocessor_15))))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_104 (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_104) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= (_ bv3 32) .cse0) (= (_ bv2 32) .cse0)))) is different from false [2021-10-13 08:12:03,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 3623 treesize of output 3591 [2021-10-13 08:12:10,537 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2021-10-13 08:12:10,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1709542993] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:12:10,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287388119] [2021-10-13 08:12:10,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:12:10,538 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:12:10,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:12:10,539 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:12:10,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-13 08:12:10,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:12:10,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:12:10,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 08:12:10,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:12:11,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-13 08:12:11,108 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 [2021-10-13 08:12:11,136 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 08:12:11,136 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 22 treesize of output 22 [2021-10-13 08:12:11,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:12:11,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-13 08:12:11,240 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 [2021-10-13 08:12:11,379 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-10-13 08:12:11,379 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 3 case distinctions, treesize of input 38 treesize of output 25 [2021-10-13 08:12:11,576 INFO L354 Elim1Store]: treesize reduction 40, result has 40.3 percent of original size [2021-10-13 08:12:11,576 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 3 case distinctions, treesize of input 30 treesize of output 44 [2021-10-13 08:12:12,696 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 08:12:12,697 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 26 treesize of output 14 [2021-10-13 08:12:12,707 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:12,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:12:12,828 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:12:12,829 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-10-13 08:12:14,861 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_17 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_113 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_17)))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_113 (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_113) c_ULTIMATE.start_main_~t~0.offset (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= (_ bv3 32) .cse0) (= (_ bv2 32) .cse0)))) is different from false [2021-10-13 08:12:16,921 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~p~0.offset (_ BitVec 32)) (v_DerPreprocessor_17 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_113 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) ULTIMATE.start_main_~p~0.offset (_ bv2 32)) (bvadd ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_17)))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_113 (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_113) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= (_ bv2 32) .cse0) (= (_ bv3 32) .cse0)))) is different from false [2021-10-13 08:12:16,941 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:12:16,942 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-10-13 08:12:18,977 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~p~0.offset_120 (_ BitVec 32)) (v_DerPreprocessor_17 (_ BitVec 32)) (v_DerPreprocessor_18 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_113 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (let ((.cse2 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_18)))) (store .cse2 c_ULTIMATE.start_main_~t~0.base (store (store (select .cse2 c_ULTIMATE.start_main_~t~0.base) v_ULTIMATE.start_main_~p~0.offset_120 (_ bv2 32)) (bvadd v_ULTIMATE.start_main_~p~0.offset_120 (_ bv4 32)) v_DerPreprocessor_17))))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_113 (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_113) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= (_ bv2 32) .cse0) (= (_ bv3 32) .cse0)))) is different from false [2021-10-13 08:12:19,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1073 treesize of output 1065 [2021-10-13 08:12:21,382 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2021-10-13 08:12:21,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287388119] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:12:21,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:12:21,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 27 [2021-10-13 08:12:21,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613155385] [2021-10-13 08:12:21,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-13 08:12:21,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:12:21,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-13 08:12:21,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=233, Unknown=10, NotChecked=390, Total=702 [2021-10-13 08:12:21,386 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:23,618 WARN L838 $PredicateComparison]: unable to prove that (and (= (_ bv0 32) c_ULTIMATE.start_main_~a~0.offset) (forall ((v_ULTIMATE.start_main_~p~0.offset_111 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_104 (_ BitVec 32)) (v_DerPreprocessor_15 (_ BitVec 32)) (v_DerPreprocessor_16 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (let ((.cse2 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_16)))) (store .cse2 c_ULTIMATE.start_main_~t~0.base (store (store (select .cse2 c_ULTIMATE.start_main_~t~0.base) v_ULTIMATE.start_main_~p~0.offset_111 (_ bv2 32)) (bvadd v_ULTIMATE.start_main_~p~0.offset_111 (_ bv4 32)) v_DerPreprocessor_15))))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_104 (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_104) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= (_ bv3 32) .cse0) (= (_ bv2 32) .cse0)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| c_ULTIMATE.start_main_~a~0.base)))))) (_ bv1 1))) (not (= c_ULTIMATE.start_main_~t~0.base c_ULTIMATE.start_main_~a~0.base)) (forall ((v_ULTIMATE.start_main_~p~0.offset_102 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_95 (_ BitVec 32)) (v_DerPreprocessor_13 (_ BitVec 32)) (v_DerPreprocessor_14 (_ BitVec 32))) (let ((.cse3 (select (select (let ((.cse4 (let ((.cse5 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_14)))) (store .cse5 c_ULTIMATE.start_main_~t~0.base (store (store (select .cse5 c_ULTIMATE.start_main_~t~0.base) v_ULTIMATE.start_main_~p~0.offset_102 (_ bv2 32)) (bvadd v_ULTIMATE.start_main_~p~0.offset_102 (_ bv4 32)) v_DerPreprocessor_13))))) (store .cse4 v_ULTIMATE.start_main_~p~0.base_95 (store (select .cse4 v_ULTIMATE.start_main_~p~0.base_95) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= (_ bv2 32) .cse3) (= (_ bv3 32) .cse3)))) (= c_ULTIMATE.start_main_~p~0.offset c_ULTIMATE.start_main_~a~0.offset) (= c_ULTIMATE.start_main_~p~0.base c_ULTIMATE.start_main_~a~0.base) (= (_ bv2 32) (select (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset)) (forall ((v_ULTIMATE.start_main_~p~0.offset_120 (_ BitVec 32)) (v_DerPreprocessor_17 (_ BitVec 32)) (v_DerPreprocessor_18 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_113 (_ BitVec 32))) (let ((.cse6 (select (select (let ((.cse7 (let ((.cse8 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_18)))) (store .cse8 c_ULTIMATE.start_main_~t~0.base (store (store (select .cse8 c_ULTIMATE.start_main_~t~0.base) v_ULTIMATE.start_main_~p~0.offset_120 (_ bv2 32)) (bvadd v_ULTIMATE.start_main_~p~0.offset_120 (_ bv4 32)) v_DerPreprocessor_17))))) (store .cse7 v_ULTIMATE.start_main_~p~0.base_113 (store (select .cse7 v_ULTIMATE.start_main_~p~0.base_113) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= (_ bv2 32) .cse6) (= (_ bv3 32) .cse6))))) is different from false [2021-10-13 08:12:25,647 WARN L838 $PredicateComparison]: unable to prove that (and (= (_ bv0 32) c_ULTIMATE.start_main_~a~0.offset) (forall ((v_ULTIMATE.start_main_~p~0.offset_111 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_104 (_ BitVec 32)) (v_DerPreprocessor_15 (_ BitVec 32)) (v_DerPreprocessor_16 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (let ((.cse2 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_16)))) (store .cse2 c_ULTIMATE.start_main_~t~0.base (store (store (select .cse2 c_ULTIMATE.start_main_~t~0.base) v_ULTIMATE.start_main_~p~0.offset_111 (_ bv2 32)) (bvadd v_ULTIMATE.start_main_~p~0.offset_111 (_ bv4 32)) v_DerPreprocessor_15))))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_104 (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_104) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= (_ bv3 32) .cse0) (= (_ bv2 32) .cse0)))) (not (= c_ULTIMATE.start_main_~t~0.base c_ULTIMATE.start_main_~a~0.base)) (forall ((v_ULTIMATE.start_main_~p~0.offset_102 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_95 (_ BitVec 32)) (v_DerPreprocessor_13 (_ BitVec 32)) (v_DerPreprocessor_14 (_ BitVec 32))) (let ((.cse3 (select (select (let ((.cse4 (let ((.cse5 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_14)))) (store .cse5 c_ULTIMATE.start_main_~t~0.base (store (store (select .cse5 c_ULTIMATE.start_main_~t~0.base) v_ULTIMATE.start_main_~p~0.offset_102 (_ bv2 32)) (bvadd v_ULTIMATE.start_main_~p~0.offset_102 (_ bv4 32)) v_DerPreprocessor_13))))) (store .cse4 v_ULTIMATE.start_main_~p~0.base_95 (store (select .cse4 v_ULTIMATE.start_main_~p~0.base_95) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= (_ bv2 32) .cse3) (= (_ bv3 32) .cse3)))) (= c_ULTIMATE.start_main_~p~0.offset c_ULTIMATE.start_main_~a~0.offset) (= c_ULTIMATE.start_main_~p~0.base c_ULTIMATE.start_main_~a~0.base) (= (_ bv2 32) (select (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset)) (forall ((v_ULTIMATE.start_main_~p~0.offset_120 (_ BitVec 32)) (v_DerPreprocessor_17 (_ BitVec 32)) (v_DerPreprocessor_18 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_113 (_ BitVec 32))) (let ((.cse6 (select (select (let ((.cse7 (let ((.cse8 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_18)))) (store .cse8 c_ULTIMATE.start_main_~t~0.base (store (store (select .cse8 c_ULTIMATE.start_main_~t~0.base) v_ULTIMATE.start_main_~p~0.offset_120 (_ bv2 32)) (bvadd v_ULTIMATE.start_main_~p~0.offset_120 (_ bv4 32)) v_DerPreprocessor_17))))) (store .cse7 v_ULTIMATE.start_main_~p~0.base_113 (store (select .cse7 v_ULTIMATE.start_main_~p~0.base_113) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= (_ bv2 32) .cse6) (= (_ bv3 32) .cse6))))) is different from false [2021-10-13 08:12:27,743 WARN L838 $PredicateComparison]: unable to prove that (and (= (_ bv0 32) c_ULTIMATE.start_main_~a~0.offset) (forall ((v_ULTIMATE.start_main_~p~0.base_95 (_ BitVec 32)) (ULTIMATE.start_main_~p~0.offset (_ BitVec 32)) (v_DerPreprocessor_13 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) ULTIMATE.start_main_~p~0.offset (_ bv2 32)) (bvadd ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_13)))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_95 (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_95) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= .cse0 (_ bv2 32)) (= .cse0 (_ bv3 32))))) (= (_ bv2 32) (select (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset)) (forall ((ULTIMATE.start_main_~p~0.offset (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_104 (_ BitVec 32)) (v_DerPreprocessor_15 (_ BitVec 32))) (let ((.cse2 (select (select (let ((.cse3 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) ULTIMATE.start_main_~p~0.offset (_ bv2 32)) (bvadd ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_15)))) (store .cse3 v_ULTIMATE.start_main_~p~0.base_104 (store (select .cse3 v_ULTIMATE.start_main_~p~0.base_104) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= .cse2 (_ bv2 32)) (= .cse2 (_ bv3 32))))) (forall ((ULTIMATE.start_main_~p~0.offset (_ BitVec 32)) (v_DerPreprocessor_17 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_113 (_ BitVec 32))) (let ((.cse4 (select (select (let ((.cse5 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) ULTIMATE.start_main_~p~0.offset (_ bv2 32)) (bvadd ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_17)))) (store .cse5 v_ULTIMATE.start_main_~p~0.base_113 (store (select .cse5 v_ULTIMATE.start_main_~p~0.base_113) (_ bv0 32) (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= (_ bv2 32) .cse4) (= (_ bv3 32) .cse4)))) (not (= c_ULTIMATE.start_main_~p~0.base c_ULTIMATE.start_main_~a~0.base))) is different from false [2021-10-13 08:12:29,771 WARN L838 $PredicateComparison]: unable to prove that (and (= (_ bv0 32) c_ULTIMATE.start_main_~a~0.offset) (= (_ bv2 32) (select (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset)) (= c_ULTIMATE.start_main_~t~0.offset (_ bv0 32)) (forall ((v_DerPreprocessor_17 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_113 (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_17)))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_113 (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_113) c_ULTIMATE.start_main_~t~0.offset (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= (_ bv3 32) .cse0) (= (_ bv2 32) .cse0)))) (= (_ bv2 32) (select (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset)) (forall ((v_ULTIMATE.start_main_~p~0.base_104 (_ BitVec 32)) (v_DerPreprocessor_15 (_ BitVec 32))) (let ((.cse2 (select (select (let ((.cse3 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_15)))) (store .cse3 v_ULTIMATE.start_main_~p~0.base_104 (store (select .cse3 v_ULTIMATE.start_main_~p~0.base_104) c_ULTIMATE.start_main_~t~0.offset (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= (_ bv3 32) .cse2) (= (_ bv2 32) .cse2)))) (not (= c_ULTIMATE.start_main_~p~0.base c_ULTIMATE.start_main_~a~0.base)) (forall ((v_ULTIMATE.start_main_~p~0.base_95 (_ BitVec 32)) (v_DerPreprocessor_13 (_ BitVec 32))) (let ((.cse4 (select (select (let ((.cse5 (store |c_#memory_int| c_ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32)) v_DerPreprocessor_13)))) (store .cse5 v_ULTIMATE.start_main_~p~0.base_95 (store (select .cse5 v_ULTIMATE.start_main_~p~0.base_95) c_ULTIMATE.start_main_~t~0.offset (_ bv3 32)))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= (_ bv3 32) .cse4) (= (_ bv2 32) .cse4))))) is different from false [2021-10-13 08:12:32,047 WARN L838 $PredicateComparison]: unable to prove that (and (= (_ bv0 32) c_ULTIMATE.start_main_~a~0.offset) (= (_ bv2 32) (select (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset)) (exists ((v_ULTIMATE.start_main_~p~0.base_91 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_97 (_ BitVec 32))) (and (not (= c_ULTIMATE.start_main_~a~0.base v_ULTIMATE.start_main_~p~0.base_91)) (= (_ bv2 32) (select (select |c_#memory_int| v_ULTIMATE.start_main_~p~0.base_91) v_ULTIMATE.start_main_~p~0.offset_97)))) (forall ((ULTIMATE.start_main_~p~0.base (_ BitVec 32))) (let ((.cse0 (select (select (store |c_#memory_int| ULTIMATE.start_main_~p~0.base (store (select |c_#memory_int| ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset (_ bv3 32))) c_ULTIMATE.start_main_~a~0.base) c_ULTIMATE.start_main_~a~0.offset))) (or (= .cse0 (_ bv2 32)) (= .cse0 (_ bv3 32))))) (= c_ULTIMATE.start_main_~p~0.offset (_ bv0 32))) is different from false [2021-10-13 08:12:32,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:12:32,614 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2021-10-13 08:12:32,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 08:12:32,615 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-13 08:12:32,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:12:32,617 INFO L225 Difference]: With dead ends: 66 [2021-10-13 08:12:32,617 INFO L226 Difference]: Without dead ends: 62 [2021-10-13 08:12:32,618 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 80 SyntacticMatches, 9 SemanticMatches, 32 ConstructedPredicates, 15 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 31249.6ms TimeCoverageRelationStatistics Valid=92, Invalid=295, Unknown=15, NotChecked=720, Total=1122 [2021-10-13 08:12:32,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-13 08:12:32,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2021-10-13 08:12:32,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.25) internal successors, (55), 44 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:32,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2021-10-13 08:12:32,626 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 20 [2021-10-13 08:12:32,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:12:32,626 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2021-10-13 08:12:32,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:32,627 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2021-10-13 08:12:32,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 08:12:32,628 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:12:32,629 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:12:32,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-13 08:12:32,847 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2021-10-13 08:12:33,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-13 08:12:33,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:12:33,243 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:12:33,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:12:33,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1870535852, now seen corresponding path program 1 times [2021-10-13 08:12:33,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:12:33,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [905579454] [2021-10-13 08:12:33,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:12:33,245 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:12:33,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:12:33,246 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:12:33,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-13 08:12:33,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:12:33,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 08:12:33,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:12:33,906 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 13 treesize of output 9 [2021-10-13 08:12:33,930 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 13 treesize of output 9 [2021-10-13 08:12:34,076 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-10-13 08:12:34,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 75 [2021-10-13 08:12:34,083 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 66 treesize of output 58 [2021-10-13 08:12:34,114 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-10-13 08:12:34,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 44 [2021-10-13 08:12:34,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 44 treesize of output 36 [2021-10-13 08:12:34,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 33 treesize of output 21 [2021-10-13 08:12:34,355 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 08:12:34,355 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 22 treesize of output 14 [2021-10-13 08:12:34,401 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:34,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:12:34,644 INFO L354 Elim1Store]: treesize reduction 22, result has 4.3 percent of original size [2021-10-13 08:12:34,645 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 87 treesize of output 67 [2021-10-13 08:12:34,649 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:12:34,650 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-10-13 08:12:34,652 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:12:34,654 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-10-13 08:12:34,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 129 treesize of output 123 [2021-10-13 08:12:34,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 152 treesize of output 146 [2021-10-13 08:12:35,326 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:35,326 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:12:35,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [905579454] [2021-10-13 08:12:35,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [905579454] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:12:35,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1965274891] [2021-10-13 08:12:35,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:12:35,327 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:12:35,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:12:35,328 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:12:35,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-10-13 08:12:35,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:12:35,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 08:12:35,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:12:35,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-13 08:12:36,168 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 08:12:36,169 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 21 treesize of output 21 [2021-10-13 08:12:36,297 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 18 treesize of output 14 [2021-10-13 08:12:36,314 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 13 treesize of output 9 [2021-10-13 08:12:36,508 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-10-13 08:12:36,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 72 [2021-10-13 08:12:36,514 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 67 treesize of output 59 [2021-10-13 08:12:36,545 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-10-13 08:12:36,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 49 [2021-10-13 08:12:36,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 38 treesize of output 26 [2021-10-13 08:12:36,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 15 [2021-10-13 08:12:36,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2021-10-13 08:12:36,789 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:36,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:12:36,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 72 treesize of output 56 [2021-10-13 08:12:36,934 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:12:36,935 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-10-13 08:12:36,939 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:12:36,940 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-10-13 08:12:37,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 83 treesize of output 77 [2021-10-13 08:12:37,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:12:37,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:12:37,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 08:12:41,560 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:41,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1965274891] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:12:41,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774004428] [2021-10-13 08:12:41,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:12:41,561 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:12:41,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:12:41,562 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:12:41,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-13 08:12:42,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:12:42,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 08:12:42,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:12:42,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-13 08:12:42,171 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 08:12:42,171 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 20 treesize of output 20 [2021-10-13 08:12:42,220 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 18 treesize of output 14 [2021-10-13 08:12:42,240 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 13 treesize of output 9 [2021-10-13 08:12:42,354 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-10-13 08:12:42,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 72 [2021-10-13 08:12:42,361 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 67 treesize of output 59 [2021-10-13 08:12:42,390 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-10-13 08:12:42,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 49 [2021-10-13 08:12:42,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 38 treesize of output 26 [2021-10-13 08:12:42,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 15 [2021-10-13 08:12:42,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2021-10-13 08:12:42,492 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:42,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:12:42,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 72 treesize of output 56 [2021-10-13 08:12:42,564 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:12:42,565 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-10-13 08:12:42,568 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:12:42,570 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-10-13 08:12:42,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 83 treesize of output 77 [2021-10-13 08:12:42,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:12:42,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:12:42,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 08:12:45,072 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:45,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774004428] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:12:45,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:12:45,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9, 9, 9, 9] total 29 [2021-10-13 08:12:45,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556972718] [2021-10-13 08:12:45,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-13 08:12:45,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:12:45,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-13 08:12:45,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=692, Unknown=2, NotChecked=0, Total=812 [2021-10-13 08:12:45,076 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:47,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:12:47,103 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2021-10-13 08:12:47,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 08:12:47,103 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-13 08:12:47,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:12:47,104 INFO L225 Difference]: With dead ends: 67 [2021-10-13 08:12:47,104 INFO L226 Difference]: Without dead ends: 54 [2021-10-13 08:12:47,105 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 89 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 8636.3ms TimeCoverageRelationStatistics Valid=256, Invalid=1148, Unknown=2, NotChecked=0, Total=1406 [2021-10-13 08:12:47,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-13 08:12:47,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 42. [2021-10-13 08:12:47,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 41 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:47,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-10-13 08:12:47,112 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 21 [2021-10-13 08:12:47,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:12:47,112 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-10-13 08:12:47,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:12:47,113 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-10-13 08:12:47,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 08:12:47,114 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:12:47,114 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:12:47,132 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-10-13 08:12:47,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-13 08:12:47,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-10-13 08:12:47,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:12:47,719 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:12:47,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:12:47,719 INFO L82 PathProgramCache]: Analyzing trace with hash -486159511, now seen corresponding path program 2 times [2021-10-13 08:12:47,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:12:47,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2043667462] [2021-10-13 08:12:47,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:12:47,720 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:12:47,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:12:47,722 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:12:47,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-13 08:12:48,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:12:48,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:12:48,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-13 08:12:48,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:12:48,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-13 08:12:48,369 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 08:12:48,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 27 treesize of output 34 [2021-10-13 08:12:48,504 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 26 treesize of output 22 [2021-10-13 08:12:48,614 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-13 08:12:48,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 52 [2021-10-13 08:12:48,653 INFO L354 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2021-10-13 08:12:48,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 61 treesize of output 63 [2021-10-13 08:12:48,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:12:48,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-13 08:12:48,701 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 [2021-10-13 08:12:48,926 INFO L354 Elim1Store]: treesize reduction 47, result has 16.1 percent of original size [2021-10-13 08:12:48,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 197 treesize of output 133 [2021-10-13 08:12:48,972 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-10-13 08:12:48,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 202 treesize of output 156 [2021-10-13 08:12:49,013 INFO L354 Elim1Store]: treesize reduction 75, result has 20.2 percent of original size [2021-10-13 08:12:49,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 192 treesize of output 146 [2021-10-13 08:12:49,421 INFO L354 Elim1Store]: treesize reduction 112, result has 15.8 percent of original size [2021-10-13 08:12:49,422 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 304 treesize of output 153 [2021-10-13 08:12:49,502 INFO L354 Elim1Store]: treesize reduction 104, result has 15.4 percent of original size [2021-10-13 08:12:49,502 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 219 treesize of output 146 [2021-10-13 08:12:49,538 INFO L354 Elim1Store]: treesize reduction 105, result has 12.5 percent of original size [2021-10-13 08:12:49,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 119 [2021-10-13 08:12:49,954 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-10-13 08:12:49,955 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 137 treesize of output 74 [2021-10-13 08:12:49,962 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 08:12:49,963 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 45 [2021-10-13 08:12:50,138 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-10-13 08:12:50,139 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 37 treesize of output 25 [2021-10-13 08:12:50,206 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:12:50,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:12:50,488 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:12:50,489 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-10-13 08:12:50,493 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:12:50,493 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-10-13 08:12:50,709 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:12:50,710 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 140 [2021-10-13 08:12:51,768 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:12:51,769 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 182 [2021-10-13 08:12:53,319 INFO L354 Elim1Store]: treesize reduction 4, result has 95.3 percent of original size [2021-10-13 08:12:53,320 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 2082 treesize of output 1999 [2021-10-13 08:12:53,337 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:12:53,342 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1413 [2021-10-13 08:13:03,569 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_25 (_ BitVec 32)) (v_ULTIMATE.start_main_~t~0.base_62 (_ BitVec 32)) (v_DerPreprocessor_28 (_ BitVec 32)) (v_DerPreprocessor_29 (_ BitVec 32)) (v_DerPreprocessor_26 (_ BitVec 32))) (let ((.cse3 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32))) (.cse4 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~a~0.offset))) (let ((.cse0 (select (select (let ((.cse5 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~p~0.base (store (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset v_DerPreprocessor_29) .cse3 (_ bv0 32))))) (store .cse5 v_ULTIMATE.start_main_~t~0.base_62 (store (select .cse5 v_ULTIMATE.start_main_~t~0.base_62) (_ bv0 32) v_DerPreprocessor_26))) c_ULTIMATE.start_main_~a~0.base) .cse4)) (.cse1 (select (select (let ((.cse2 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~p~0.base (store (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset v_DerPreprocessor_28) .cse3 v_ULTIMATE.start_main_~t~0.base_62)))) (store .cse2 v_ULTIMATE.start_main_~t~0.base_62 (store (select .cse2 v_ULTIMATE.start_main_~t~0.base_62) (_ bv0 32) v_DerPreprocessor_25))) c_ULTIMATE.start_main_~a~0.base) .cse4))) (or (and (= (_ bv0 32) c_ULTIMATE.start_main_~a~0.offset) (= c_ULTIMATE.start_main_~a~0.base v_ULTIMATE.start_main_~t~0.base_62)) (and (= c_ULTIMATE.start_main_~a~0.offset .cse0) (= c_ULTIMATE.start_main_~a~0.base .cse1)) (and (= c_ULTIMATE.start_main_~p~0.base .cse1) (= c_ULTIMATE.start_main_~p~0.offset .cse0) (or (not (= (_ bv0 32) .cse0)) (not (= v_ULTIMATE.start_main_~t~0.base_62 .cse1)))) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_62))))))))) is different from false [2021-10-13 08:13:03,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 6849 treesize of output 6777 [2021-10-13 08:13:03,880 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:13:03,880 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 12467 treesize of output 9086 [2021-10-13 08:13:04,066 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:13:04,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2043667462] [2021-10-13 08:13:04,067 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-13 08:13:04,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [383604021] [2021-10-13 08:13:04,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:13:04,067 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:13:04,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:13:04,068 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:13:04,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-10-13 08:13:04,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:13:04,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:13:04,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-13 08:13:04,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:13:04,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-13 08:13:04,931 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 08:13:04,932 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 21 treesize of output 21 [2021-10-13 08:13:05,089 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 13 treesize of output 9 [2021-10-13 08:13:05,104 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 18 treesize of output 14 [2021-10-13 08:13:05,278 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-13 08:13:05,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 17 [2021-10-13 08:13:05,303 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 08:13:05,318 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 34 treesize of output 16 [2021-10-13 08:13:05,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 08:13:05,587 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-10-13 08:13:05,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 80 [2021-10-13 08:13:05,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 08:13:05,617 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-10-13 08:13:05,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 108 [2021-10-13 08:13:05,622 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 105 treesize of output 75 [2021-10-13 08:13:05,931 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-10-13 08:13:05,932 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 183 treesize of output 106 [2021-10-13 08:13:05,975 INFO L354 Elim1Store]: treesize reduction 53, result has 33.8 percent of original size [2021-10-13 08:13:05,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 135 [2021-10-13 08:13:06,022 INFO L354 Elim1Store]: treesize reduction 128, result has 12.9 percent of original size [2021-10-13 08:13:06,023 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 132 treesize of output 105 [2021-10-13 08:13:06,535 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 08:13:06,536 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 57 [2021-10-13 08:13:06,542 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 08:13:06,542 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 51 treesize of output 39 [2021-10-13 08:13:07,155 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 08:13:07,155 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 22 treesize of output 14 [2021-10-13 08:13:07,274 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:13:07,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:13:08,066 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:13:08,067 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 87 [2021-10-13 08:13:08,071 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:13:08,074 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 87 [2021-10-13 08:13:09,120 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:13:09,121 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 243 [2021-10-13 08:13:47,102 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:13:47,103 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 289 [2021-10-13 08:13:48,473 INFO L354 Elim1Store]: treesize reduction 4, result has 95.3 percent of original size [2021-10-13 08:13:48,473 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 4249 treesize of output 4010 [2021-10-13 08:13:48,509 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:13:48,522 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3116 [2021-10-13 08:14:44,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 2808 treesize of output 2772 [2021-10-13 08:14:45,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 12028 treesize of output 11884 [2021-10-13 08:14:52,269 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-13 08:14:52,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895368404] [2021-10-13 08:14:52,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:14:52,270 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:14:52,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:14:52,274 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:14:52,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-13 08:14:52,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:14:52,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:14:52,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-13 08:14:52,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:14:52,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-13 08:14:53,073 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 08:14:53,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 26 treesize of output 33 [2021-10-13 08:14:53,390 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 13 treesize of output 9 [2021-10-13 08:14:53,413 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 26 treesize of output 22 [2021-10-13 08:14:53,711 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-13 08:14:53,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 16 [2021-10-13 08:14:53,727 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 [2021-10-13 08:14:53,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:14:53,745 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 77 treesize of output 53 [2021-10-13 08:14:53,785 INFO L354 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2021-10-13 08:14:53,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 62 treesize of output 64 [2021-10-13 08:14:54,134 INFO L354 Elim1Store]: treesize reduction 47, result has 16.1 percent of original size [2021-10-13 08:14:54,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 206 treesize of output 142 [2021-10-13 08:14:54,174 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-10-13 08:14:54,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 211 treesize of output 159 [2021-10-13 08:14:54,204 INFO L354 Elim1Store]: treesize reduction 75, result has 20.2 percent of original size [2021-10-13 08:14:54,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 201 treesize of output 155 [2021-10-13 08:14:54,717 INFO L354 Elim1Store]: treesize reduction 112, result has 15.8 percent of original size [2021-10-13 08:14:54,717 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 303 treesize of output 156 [2021-10-13 08:14:54,775 INFO L354 Elim1Store]: treesize reduction 104, result has 15.4 percent of original size [2021-10-13 08:14:54,775 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 218 treesize of output 141 [2021-10-13 08:14:54,805 INFO L354 Elim1Store]: treesize reduction 69, result has 13.8 percent of original size [2021-10-13 08:14:54,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 84 [2021-10-13 08:14:55,489 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 08:14:55,489 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 61 [2021-10-13 08:14:55,497 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 08:14:55,497 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 55 treesize of output 39 [2021-10-13 08:14:55,820 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-10-13 08:14:55,820 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 33 treesize of output 25 [2021-10-13 08:14:55,835 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:14:55,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:14:55,938 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:14:55,939 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-10-13 08:14:55,944 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:14:55,945 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-10-13 08:14:56,138 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:14:56,140 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 140 [2021-10-13 08:14:57,482 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:14:57,483 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-10-13 08:14:57,839 INFO L354 Elim1Store]: treesize reduction 4, result has 95.3 percent of original size [2021-10-13 08:14:57,839 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 3893 treesize of output 3658 [2021-10-13 08:14:57,867 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:14:57,872 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2015 [2021-10-13 08:15:08,982 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~t~0.base_65 (_ BitVec 32)) (v_DerPreprocessor_25 (_ BitVec 32)) (v_DerPreprocessor_39 (_ BitVec 32)) (v_DerPreprocessor_26 (_ BitVec 32)) (v_DerPreprocessor_38 (_ BitVec 32))) (let ((.cse3 (bvadd c_ULTIMATE.start_main_~p~0.offset (_ bv4 32))) (.cse4 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~a~0.offset))) (let ((.cse0 (select (select (let ((.cse5 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~p~0.base (store (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset v_DerPreprocessor_38) .cse3 v_ULTIMATE.start_main_~t~0.base_65)))) (store .cse5 v_ULTIMATE.start_main_~t~0.base_65 (store (select .cse5 v_ULTIMATE.start_main_~t~0.base_65) (_ bv0 32) v_DerPreprocessor_25))) c_ULTIMATE.start_main_~a~0.base) .cse4)) (.cse1 (select (select (let ((.cse2 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~p~0.base (store (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~p~0.base) c_ULTIMATE.start_main_~p~0.offset v_DerPreprocessor_39) .cse3 (_ bv0 32))))) (store .cse2 v_ULTIMATE.start_main_~t~0.base_65 (store (select .cse2 v_ULTIMATE.start_main_~t~0.base_65) (_ bv0 32) v_DerPreprocessor_26))) c_ULTIMATE.start_main_~a~0.base) .cse4))) (or (and (= .cse0 c_ULTIMATE.start_main_~a~0.base) (= .cse1 c_ULTIMATE.start_main_~a~0.offset)) (and (= (_ bv0 32) c_ULTIMATE.start_main_~a~0.offset) (= c_ULTIMATE.start_main_~a~0.base v_ULTIMATE.start_main_~t~0.base_65)) (and (= .cse0 c_ULTIMATE.start_main_~p~0.base) (or (not (= .cse1 (_ bv0 32))) (not (= .cse0 v_ULTIMATE.start_main_~t~0.base_65))) (= .cse1 c_ULTIMATE.start_main_~p~0.offset)) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~t~0.base_65)))))))) is different from false [2021-10-13 08:15:09,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 10382 treesize of output 10238 [2021-10-13 08:15:09,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 10664 treesize of output 10628 [2021-10-13 08:15:10,262 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-13 08:15:10,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:15:10,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-13 08:15:10,264 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-10-13 08:15:10,265 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-13 08:15:10,273 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 08:15:10,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-13 08:15:10,495 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2021-10-13 08:15:10,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-13 08:15:10,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:15:10,898 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 08:15:10,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 08:15:10 BoogieIcfgContainer [2021-10-13 08:15:10,916 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 08:15:10,917 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 08:15:10,917 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 08:15:10,918 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 08:15:10,918 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:09:37" (3/4) ... [2021-10-13 08:15:10,923 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-13 08:15:10,926 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 08:15:10,927 INFO L168 Benchmark]: Toolchain (without parser) took 334425.93 ms. Allocated memory was 62.9 MB in the beginning and 283.1 MB in the end (delta: 220.2 MB). Free memory was 42.8 MB in the beginning and 81.2 MB in the end (delta: -38.5 MB). Peak memory consumption was 181.3 MB. Max. memory is 16.1 GB. [2021-10-13 08:15:10,927 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 62.9 MB. Free memory was 43.4 MB in the beginning and 43.3 MB in the end (delta: 54.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:15:10,928 INFO L168 Benchmark]: CACSL2BoogieTranslator took 626.62 ms. Allocated memory is still 62.9 MB. Free memory was 42.5 MB in the beginning and 38.2 MB in the end (delta: 4.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 08:15:10,928 INFO L168 Benchmark]: Boogie Procedure Inliner took 79.36 ms. Allocated memory is still 62.9 MB. Free memory was 38.2 MB in the beginning and 36.1 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:15:10,928 INFO L168 Benchmark]: Boogie Preprocessor took 42.08 ms. Allocated memory is still 62.9 MB. Free memory was 36.1 MB in the beginning and 34.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:15:10,929 INFO L168 Benchmark]: RCFGBuilder took 587.03 ms. Allocated memory is still 62.9 MB. Free memory was 34.4 MB in the beginning and 41.2 MB in the end (delta: -6.7 MB). Peak memory consumption was 14.5 MB. Max. memory is 16.1 GB. [2021-10-13 08:15:10,931 INFO L168 Benchmark]: TraceAbstraction took 333068.82 ms. Allocated memory was 62.9 MB in the beginning and 283.1 MB in the end (delta: 220.2 MB). Free memory was 40.9 MB in the beginning and 81.2 MB in the end (delta: -40.4 MB). Peak memory consumption was 189.0 MB. Max. memory is 16.1 GB. [2021-10-13 08:15:10,931 INFO L168 Benchmark]: Witness Printer took 8.77 ms. Allocated memory is still 283.1 MB. Free memory is still 81.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:15:10,933 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 62.9 MB. Free memory was 43.4 MB in the beginning and 43.3 MB in the end (delta: 54.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 626.62 ms. Allocated memory is still 62.9 MB. Free memory was 42.5 MB in the beginning and 38.2 MB in the end (delta: 4.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 79.36 ms. Allocated memory is still 62.9 MB. Free memory was 38.2 MB in the beginning and 36.1 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 42.08 ms. Allocated memory is still 62.9 MB. Free memory was 36.1 MB in the beginning and 34.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 587.03 ms. Allocated memory is still 62.9 MB. Free memory was 34.4 MB in the beginning and 41.2 MB in the end (delta: -6.7 MB). Peak memory consumption was 14.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 333068.82 ms. Allocated memory was 62.9 MB in the beginning and 283.1 MB in the end (delta: 220.2 MB). Free memory was 40.9 MB in the beginning and 81.2 MB in the end (delta: -40.4 MB). Peak memory consumption was 189.0 MB. Max. memory is 16.1 GB. * Witness Printer took 8.77 ms. Allocated memory is still 283.1 MB. Free memory is still 81.2 MB. There was no memory consumed. 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 - UnprovableResult [Line: 557]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L532] List a = (List) malloc(sizeof(struct node)); [L533] COND FALSE !(a == 0) [L534] List t; [L535] List p = a; [L536] COND FALSE !(__VERIFIER_nondet_int()) [L543] COND TRUE __VERIFIER_nondet_int() [L544] p->h = 2 [L545] t = (List) malloc(sizeof(struct node)) [L546] COND FALSE !(t == 0) [L547] p->n = t [L548] EXPR p->n [L548] p = p->n [L543] COND TRUE __VERIFIER_nondet_int() [L544] p->h = 2 [L545] t = (List) malloc(sizeof(struct node)) [L546] COND FALSE !(t == 0) [L547] p->n = t [L548] EXPR p->n [L548] p = p->n [L543] COND FALSE !(__VERIFIER_nondet_int()) [L550] p->h = 3 [L551] p = a [L552] EXPR p->h [L552] COND FALSE !(p->h == 1) [L554] EXPR p->h [L554] COND TRUE p->h == 2 [L555] EXPR p->n [L555] p = p->n [L554] EXPR p->h [L554] COND FALSE !(p->h == 2) [L556] EXPR p->h [L556] COND TRUE p->h != 3 [L557] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 332978.5ms, OverallIterations: 10, TraceHistogramMax: 3, EmptinessCheckTime: 21.0ms, AutomataDifference: 56539.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 148 SDtfs, 428 SDslu, 756 SDs, 0 SdLazy, 1409 SolverSat, 223 SolverUnsat, 14 SolverUnknown, 0 SolverNotchecked, 33820.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 694 GetRequests, 472 SyntacticMatches, 42 SemanticMatches, 180 ConstructedPredicates, 18 IntricatePredicates, 0 DeprecatedPredicates, 1608 ImplicationChecksByTransitivity, 96222.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=8, InterpolantAutomatonStates: 90, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 89.2ms AutomataMinimizationTime, 9 MinimizatonAttempts, 118 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 254.7ms SsaConstructionTime, 901.7ms SatisfiabilityAnalysisTime, 123609.4ms InterpolantComputationTime, 340 NumberOfCodeBlocks, 340 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 642 ConstructedInterpolants, 120 QuantifiedInterpolants, 9135 SizeOfPredicates, 187 NumberOfNonLiveVariables, 1109 ConjunctsInSsa, 278 ConjunctsInUnsatCore, 38 InterpolantComputations, 8 PerfectInterpolantSequences, 35/110 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-13 08:15:11,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_099ea63c-e305-447a-b3fe-4aa0a18fd72a/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...