./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/eqn2f.c --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_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/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_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/eqn2f.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/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_028d3c56-815a-4aa1-bd83-3b8a79b02bff/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 d865065a7c8613a66332b84e9d5b1d95cce65492 ................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/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_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/eqn2f.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/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_028d3c56-815a-4aa1-bd83-3b8a79b02bff/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 d865065a7c8613a66332b84e9d5b1d95cce65492 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:31:21,671 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:31:21,674 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:31:21,735 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:31:21,735 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:31:21,740 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:31:21,742 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:31:21,746 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:31:21,749 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:31:21,754 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:31:21,755 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:31:21,757 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:31:21,758 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:31:21,761 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:31:21,763 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:31:21,771 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:31:21,773 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:31:21,774 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:31:21,776 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:31:21,783 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:31:21,784 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:31:21,789 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:31:21,793 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:31:21,794 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:31:21,804 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:31:21,805 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:31:21,805 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:31:21,808 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:31:21,808 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:31:21,810 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:31:21,811 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:31:21,812 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:31:21,814 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:31:21,815 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:31:21,818 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:31:21,818 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:31:21,820 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:31:21,821 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:31:21,821 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:31:21,822 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:31:21,823 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:31:21,824 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 07:31:21,848 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:31:21,848 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:31:21,849 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:31:21,850 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:31:21,850 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:31:21,850 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:31:21,850 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:31:21,851 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:31:21,851 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:31:21,851 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:31:21,851 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:31:21,852 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:31:21,852 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:31:21,852 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:31:21,852 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:31:21,853 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:31:21,854 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:31:21,854 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:31:21,854 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:31:21,854 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:31:21,855 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:31:21,855 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:31:21,855 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:31:21,855 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:31:21,855 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:31:21,856 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:31:21,856 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:31:21,856 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:31:21,857 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:31:21,857 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:31:21,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:31:21,857 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:31:21,858 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:31:21,858 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:31:21,858 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:31:21,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:31:21,859 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:31:21,859 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:31:21,859 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:31:21,859 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_028d3c56-815a-4aa1-bd83-3b8a79b02bff/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d865065a7c8613a66332b84e9d5b1d95cce65492 [2021-10-13 07:31:22,126 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:31:22,148 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:31:22,150 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:31:22,152 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:31:22,153 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:31:22,154 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/array-fpi/eqn2f.c [2021-10-13 07:31:22,229 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/data/414e0d3d5/d3edc607d0d14b4f89c153d88d699a0d/FLAG8352c44cb [2021-10-13 07:31:22,834 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:31:22,835 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/sv-benchmarks/c/array-fpi/eqn2f.c [2021-10-13 07:31:22,848 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/data/414e0d3d5/d3edc607d0d14b4f89c153d88d699a0d/FLAG8352c44cb [2021-10-13 07:31:23,181 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/data/414e0d3d5/d3edc607d0d14b4f89c153d88d699a0d [2021-10-13 07:31:23,185 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:31:23,189 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:31:23,194 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:31:23,194 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:31:23,198 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:31:23,200 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:31:23" (1/1) ... [2021-10-13 07:31:23,202 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f54e4d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:31:23, skipping insertion in model container [2021-10-13 07:31:23,202 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:31:23" (1/1) ... [2021-10-13 07:31:23,210 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:31:23,225 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:31:23,431 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_028d3c56-815a-4aa1-bd83-3b8a79b02bff/sv-benchmarks/c/array-fpi/eqn2f.c[588,601] [2021-10-13 07:31:23,450 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:31:23,460 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:31:23,473 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_028d3c56-815a-4aa1-bd83-3b8a79b02bff/sv-benchmarks/c/array-fpi/eqn2f.c[588,601] [2021-10-13 07:31:23,482 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:31:23,498 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:31:23,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:31:23 WrapperNode [2021-10-13 07:31:23,499 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:31:23,501 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:31:23,501 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:31:23,501 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:31:23,510 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:31:23" (1/1) ... [2021-10-13 07:31:23,518 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:31:23" (1/1) ... [2021-10-13 07:31:23,541 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:31:23,542 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:31:23,542 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:31:23,542 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:31:23,551 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:31:23" (1/1) ... [2021-10-13 07:31:23,552 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:31:23" (1/1) ... [2021-10-13 07:31:23,554 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:31:23" (1/1) ... [2021-10-13 07:31:23,555 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:31:23" (1/1) ... [2021-10-13 07:31:23,562 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:31:23" (1/1) ... [2021-10-13 07:31:23,566 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:31:23" (1/1) ... [2021-10-13 07:31:23,568 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:31:23" (1/1) ... [2021-10-13 07:31:23,571 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:31:23,572 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:31:23,572 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:31:23,572 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:31:23,583 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:31:23" (1/1) ... [2021-10-13 07:31:23,590 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:31:23,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:31:23,622 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:31:23,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:31:23,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:31:23,661 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:31:23,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 07:31:23,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 07:31:23,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:31:23,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:31:23,664 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 07:31:24,088 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:31:24,088 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-13 07:31:24,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:31:24 BoogieIcfgContainer [2021-10-13 07:31:24,091 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:31:24,093 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:31:24,093 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:31:24,105 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:31:24,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:31:23" (1/3) ... [2021-10-13 07:31:24,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65d91ccf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:31:24, skipping insertion in model container [2021-10-13 07:31:24,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:31:23" (2/3) ... [2021-10-13 07:31:24,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65d91ccf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:31:24, skipping insertion in model container [2021-10-13 07:31:24,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:31:24" (3/3) ... [2021-10-13 07:31:24,108 INFO L111 eAbstractionObserver]: Analyzing ICFG eqn2f.c [2021-10-13 07:31:24,114 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:31:24,115 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:31:24,175 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:31:24,184 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 07:31:24,185 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:31:24,201 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:31:24,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 07:31:24,207 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:31:24,208 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:31:24,208 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:31:24,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:31:24,224 INFO L82 PathProgramCache]: Analyzing trace with hash -735732333, now seen corresponding path program 1 times [2021-10-13 07:31:24,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:31:24,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903878720] [2021-10-13 07:31:24,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:31:24,241 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:31:24,383 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 07:31:24,384 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [244580777] [2021-10-13 07:31:24,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:31:24,385 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:31:24,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:31:24,392 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:31:24,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 07:31:24,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:31:24,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 07:31:24,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:31:24,610 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-10-13 07:31:24,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-10-13 07:31:24,859 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 07:31:24,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:31:24,982 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 07:31:24,983 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:31:24,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903878720] [2021-10-13 07:31:24,985 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 07:31:24,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244580777] [2021-10-13 07:31:24,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244580777] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:31:24,986 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:31:24,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-10-13 07:31:24,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377748550] [2021-10-13 07:31:24,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 07:31:24,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:31:25,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 07:31:25,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:31:25,013 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:31:25,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:31:25,140 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2021-10-13 07:31:25,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 07:31:25,142 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-13 07:31:25,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:31:25,150 INFO L225 Difference]: With dead ends: 35 [2021-10-13 07:31:25,151 INFO L226 Difference]: Without dead ends: 20 [2021-10-13 07:31:25,154 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 75.6ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-10-13 07:31:25,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-13 07:31:25,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 13. [2021-10-13 07:31:25,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:31:25,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2021-10-13 07:31:25,187 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 7 [2021-10-13 07:31:25,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:31:25,188 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 17 transitions. [2021-10-13 07:31:25,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:31:25,189 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 17 transitions. [2021-10-13 07:31:25,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 07:31:25,189 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:31:25,190 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:31:25,224 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-13 07:31:25,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-10-13 07:31:25,413 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:31:25,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:31:25,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1337635293, now seen corresponding path program 1 times [2021-10-13 07:31:25,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:31:25,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349016701] [2021-10-13 07:31:25,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:31:25,415 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:31:25,444 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 07:31:25,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2105605699] [2021-10-13 07:31:25,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:31:25,449 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:31:25,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:31:25,451 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:31:25,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 07:31:25,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:31:25,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:31:25,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:31:25,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:31:25,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:31:25,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:31:25,599 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:31:25,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349016701] [2021-10-13 07:31:25,599 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 07:31:25,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105605699] [2021-10-13 07:31:25,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105605699] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:31:25,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:31:25,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-10-13 07:31:25,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593941371] [2021-10-13 07:31:25,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:31:25,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:31:25,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:31:25,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:31:25,603 INFO L87 Difference]: Start difference. First operand 13 states and 17 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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 07:31:25,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:31:25,660 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2021-10-13 07:31:25,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:31:25,667 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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 8 [2021-10-13 07:31:25,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:31:25,669 INFO L225 Difference]: With dead ends: 25 [2021-10-13 07:31:25,669 INFO L226 Difference]: Without dead ends: 19 [2021-10-13 07:31:25,670 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.2ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:31:25,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-10-13 07:31:25,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 13. [2021-10-13 07:31:25,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 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 07:31:25,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2021-10-13 07:31:25,679 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 8 [2021-10-13 07:31:25,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:31:25,679 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2021-10-13 07:31:25,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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 07:31:25,680 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2021-10-13 07:31:25,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 07:31:25,680 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:31:25,681 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:31:25,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:31:25,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-10-13 07:31:25,882 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:31:25,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:31:25,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1611921030, now seen corresponding path program 1 times [2021-10-13 07:31:25,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:31:25,883 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2463651] [2021-10-13 07:31:25,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:31:25,883 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:31:25,908 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 07:31:25,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [898183638] [2021-10-13 07:31:25,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:31:25,909 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:31:25,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:31:25,910 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:31:25,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-13 07:31:25,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:31:25,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:31:25,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:31:26,047 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 07:31:26,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:31:26,084 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 07:31:26,084 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:31:26,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2463651] [2021-10-13 07:31:26,085 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 07:31:26,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898183638] [2021-10-13 07:31:26,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898183638] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:31:26,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1270471506] [2021-10-13 07:31:26,108 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-10-13 07:31:26,109 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 07:31:26,113 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 07:31:26,121 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 07:31:26,122 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 07:31:26,156 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:31:26,158 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:31:26,158 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:31:26,159 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-13 07:31:26,162 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:31:26,163 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:31:26,164 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-13 07:31:26,166 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-10-13 07:31:26,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:26,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:26,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:26,233 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-10-13 07:31:26,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 43 treesize of output 42 [2021-10-13 07:31:26,238 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:31:26,243 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-13 07:31:26,244 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:31:26,245 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-13 07:31:26,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 07:31:26,248 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:31:26,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:31:26,274 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:31:26,277 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 108 [2021-10-13 07:31:26,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 07:31:26,278 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:124, output treesize:108 [2021-10-13 07:31:26,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-13 07:31:26,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:31:26,505 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#length_19| 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 07:31:26,510 INFO L168 Benchmark]: Toolchain (without parser) took 3320.82 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 58.0 MB in the beginning and 44.7 MB in the end (delta: 13.2 MB). Peak memory consumption was 32.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:31:26,510 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 98.6 MB. Free memory is still 74.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:31:26,511 INFO L168 Benchmark]: CACSL2BoogieTranslator took 306.01 ms. Allocated memory is still 98.6 MB. Free memory was 57.8 MB in the beginning and 73.7 MB in the end (delta: -16.0 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-13 07:31:26,512 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.36 ms. Allocated memory is still 98.6 MB. Free memory was 73.7 MB in the beginning and 72.1 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:31:26,512 INFO L168 Benchmark]: Boogie Preprocessor took 29.06 ms. Allocated memory is still 98.6 MB. Free memory was 72.1 MB in the beginning and 70.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:31:26,513 INFO L168 Benchmark]: RCFGBuilder took 519.41 ms. Allocated memory is still 98.6 MB. Free memory was 70.8 MB in the beginning and 57.3 MB in the end (delta: 13.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:31:26,514 INFO L168 Benchmark]: TraceAbstraction took 2415.64 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 56.7 MB in the beginning and 44.7 MB in the end (delta: 12.0 MB). Peak memory consumption was 32.3 MB. Max. memory is 16.1 GB. [2021-10-13 07:31:26,526 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 98.6 MB. Free memory is still 74.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 306.01 ms. Allocated memory is still 98.6 MB. Free memory was 57.8 MB in the beginning and 73.7 MB in the end (delta: -16.0 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.36 ms. Allocated memory is still 98.6 MB. Free memory was 73.7 MB in the beginning and 72.1 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.06 ms. Allocated memory is still 98.6 MB. Free memory was 72.1 MB in the beginning and 70.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 519.41 ms. Allocated memory is still 98.6 MB. Free memory was 70.8 MB in the beginning and 57.3 MB in the end (delta: 13.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2415.64 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 56.7 MB in the beginning and 44.7 MB in the end (delta: 12.0 MB). Peak memory consumption was 32.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#length_19| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#length_19|: 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 07:31:26,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/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 07:31:29,234 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:31:29,237 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:31:29,294 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:31:29,295 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:31:29,300 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:31:29,303 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:31:29,309 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:31:29,313 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:31:29,326 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:31:29,327 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:31:29,329 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:31:29,331 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:31:29,334 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:31:29,337 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:31:29,344 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:31:29,346 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:31:29,348 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:31:29,350 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:31:29,358 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:31:29,361 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:31:29,363 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:31:29,366 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:31:29,369 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:31:29,376 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:31:29,376 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:31:29,377 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:31:29,379 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:31:29,380 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:31:29,381 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:31:29,382 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:31:29,383 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:31:29,385 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:31:29,387 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:31:29,389 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:31:29,389 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:31:29,390 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:31:29,390 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:31:29,391 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:31:29,393 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:31:29,394 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:31:29,399 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 07:31:29,464 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:31:29,465 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:31:29,467 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:31:29,467 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:31:29,468 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:31:29,468 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:31:29,468 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:31:29,469 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:31:29,469 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:31:29,471 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:31:29,472 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:31:29,472 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:31:29,473 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:31:29,473 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:31:29,473 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:31:29,473 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:31:29,474 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:31:29,474 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 07:31:29,474 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 07:31:29,474 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:31:29,475 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:31:29,475 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:31:29,475 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:31:29,475 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:31:29,476 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 07:31:29,476 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:31:29,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:31:29,476 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:31:29,477 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:31:29,477 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:31:29,477 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 07:31:29,477 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 07:31:29,478 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:31:29,478 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:31:29,478 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:31:29,479 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_028d3c56-815a-4aa1-bd83-3b8a79b02bff/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d865065a7c8613a66332b84e9d5b1d95cce65492 [2021-10-13 07:31:29,905 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:31:29,945 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:31:29,948 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:31:29,950 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:31:29,951 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:31:29,952 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/array-fpi/eqn2f.c [2021-10-13 07:31:30,032 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/data/22ce46abc/795b9ed881d54ffab69620891283a823/FLAG0b045f2e3 [2021-10-13 07:31:30,618 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:31:30,620 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/sv-benchmarks/c/array-fpi/eqn2f.c [2021-10-13 07:31:30,633 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/data/22ce46abc/795b9ed881d54ffab69620891283a823/FLAG0b045f2e3 [2021-10-13 07:31:30,966 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/data/22ce46abc/795b9ed881d54ffab69620891283a823 [2021-10-13 07:31:30,970 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:31:30,971 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:31:30,973 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:31:30,974 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:31:30,978 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:31:30,978 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:31:30" (1/1) ... [2021-10-13 07:31:30,980 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@774e3779 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:31:30, skipping insertion in model container [2021-10-13 07:31:30,981 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:31:30" (1/1) ... [2021-10-13 07:31:30,991 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:31:31,009 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:31:31,182 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_028d3c56-815a-4aa1-bd83-3b8a79b02bff/sv-benchmarks/c/array-fpi/eqn2f.c[588,601] [2021-10-13 07:31:31,203 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:31:31,219 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:31:31,234 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_028d3c56-815a-4aa1-bd83-3b8a79b02bff/sv-benchmarks/c/array-fpi/eqn2f.c[588,601] [2021-10-13 07:31:31,246 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:31:31,263 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:31:31,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:31:31 WrapperNode [2021-10-13 07:31:31,264 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:31:31,265 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:31:31,266 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:31:31,266 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:31:31,283 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:31:31" (1/1) ... [2021-10-13 07:31:31,303 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:31:31" (1/1) ... [2021-10-13 07:31:31,347 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:31:31,349 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:31:31,349 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:31:31,349 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:31:31,357 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:31:31" (1/1) ... [2021-10-13 07:31:31,358 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:31:31" (1/1) ... [2021-10-13 07:31:31,367 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:31:31" (1/1) ... [2021-10-13 07:31:31,368 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:31:31" (1/1) ... [2021-10-13 07:31:31,386 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:31:31" (1/1) ... [2021-10-13 07:31:31,393 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:31:31" (1/1) ... [2021-10-13 07:31:31,399 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:31:31" (1/1) ... [2021-10-13 07:31:31,406 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:31:31,409 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:31:31,410 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:31:31,411 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:31:31,412 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:31:31" (1/1) ... [2021-10-13 07:31:31,419 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:31:31,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:31:31,450 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:31:31,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:31:31,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 07:31:31,505 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:31:31,506 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-10-13 07:31:31,506 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 07:31:31,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:31:31,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:31:31,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-10-13 07:31:31,870 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:31:31,871 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-13 07:31:31,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:31:31 BoogieIcfgContainer [2021-10-13 07:31:31,873 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:31:31,874 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:31:31,875 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:31:31,877 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:31:31,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:31:30" (1/3) ... [2021-10-13 07:31:31,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14ec6717 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:31:31, skipping insertion in model container [2021-10-13 07:31:31,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:31:31" (2/3) ... [2021-10-13 07:31:31,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14ec6717 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:31:31, skipping insertion in model container [2021-10-13 07:31:31,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:31:31" (3/3) ... [2021-10-13 07:31:31,881 INFO L111 eAbstractionObserver]: Analyzing ICFG eqn2f.c [2021-10-13 07:31:31,886 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:31:31,887 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:31:31,934 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:31:31,942 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 07:31:31,942 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:31:31,964 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 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 07:31:31,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 07:31:31,973 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:31:31,974 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:31:31,975 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:31:31,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:31:31,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2021-10-13 07:31:32,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:31:32,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1091474419] [2021-10-13 07:31:32,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:31:32,010 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:31:32,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:31:32,016 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:31:32,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 07:31:32,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:31:32,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 07:31:32,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:31:32,249 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 07:31:32,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:31:32,314 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 07:31:32,325 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:31:32,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1091474419] [2021-10-13 07:31:32,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1091474419] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:31:32,327 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:31:32,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 07:31:32,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066167017] [2021-10-13 07:31:32,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 07:31:32,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:31:32,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 07:31:32,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:31:32,359 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 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) 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 07:31:32,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:31:32,391 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2021-10-13 07:31:32,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 07:31:32,393 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 07:31:32,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:31:32,401 INFO L225 Difference]: With dead ends: 38 [2021-10-13 07:31:32,401 INFO L226 Difference]: Without dead ends: 17 [2021-10-13 07:31:32,403 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 07:31:32,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-13 07:31:32,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-10-13 07:31:32,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:31:32,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-10-13 07:31:32,435 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2021-10-13 07:31:32,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:31:32,436 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-10-13 07:31:32,436 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 07:31:32,436 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-10-13 07:31:32,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 07:31:32,437 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:31:32,437 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:31:32,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:31:32,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:31:32,650 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:31:32,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:31:32,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2021-10-13 07:31:32,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:31:32,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2122171244] [2021-10-13 07:31:32,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:31:32,652 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:31:32,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:31:32,654 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:31:32,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 07:31:32,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:31:32,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 07:31:32,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:31:32,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:32,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:32,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:32,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:32,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:31:32,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:33,044 INFO L354 Elim1Store]: treesize reduction 152, result has 24.0 percent of original size [2021-10-13 07:31:33,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 68 [2021-10-13 07:31:33,331 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:31:33,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 33 [2021-10-13 07:31:33,376 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 07:31:33,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:31:33,696 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 07:31:33,696 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:31:33,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2122171244] [2021-10-13 07:31:33,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2122171244] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:31:33,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:31:33,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-13 07:31:33,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027415712] [2021-10-13 07:31:33,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 07:31:33,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:31:33,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 07:31:33,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:31:33,702 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 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 07:31:34,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:31:34,347 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2021-10-13 07:31:34,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 07:31:34,351 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 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 12 [2021-10-13 07:31:34,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:31:34,352 INFO L225 Difference]: With dead ends: 35 [2021-10-13 07:31:34,352 INFO L226 Difference]: Without dead ends: 33 [2021-10-13 07:31:34,353 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 337.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-10-13 07:31:34,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-13 07:31:34,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 23. [2021-10-13 07:31:34,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 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 07:31:34,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-10-13 07:31:34,360 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2021-10-13 07:31:34,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:31:34,361 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-10-13 07:31:34,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 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 07:31:34,361 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-10-13 07:31:34,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 07:31:34,362 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:31:34,362 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:31:34,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:31:34,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:31:34,574 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:31:34,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:31:34,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1755224028, now seen corresponding path program 1 times [2021-10-13 07:31:34,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:31:34,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [112800961] [2021-10-13 07:31:34,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:31:34,576 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:31:34,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:31:34,580 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:31:34,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 07:31:34,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:31:34,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:31:34,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:31:34,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:31:34,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:31:35,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:31:35,031 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:31:35,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [112800961] [2021-10-13 07:31:35,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [112800961] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:31:35,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:31:35,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 5] imperfect sequences [] total 10 [2021-10-13 07:31:35,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547257383] [2021-10-13 07:31:35,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 07:31:35,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:31:35,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 07:31:35,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-13 07:31:35,042 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 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 07:31:35,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:31:35,585 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2021-10-13 07:31:35,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 07:31:35,586 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 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) Word has length 14 [2021-10-13 07:31:35,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:31:35,587 INFO L225 Difference]: With dead ends: 43 [2021-10-13 07:31:35,587 INFO L226 Difference]: Without dead ends: 34 [2021-10-13 07:31:35,588 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 353.3ms TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-10-13 07:31:35,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-13 07:31:35,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 23. [2021-10-13 07:31:35,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:31:35,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-10-13 07:31:35,594 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2021-10-13 07:31:35,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:31:35,595 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-10-13 07:31:35,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 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 07:31:35,595 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-10-13 07:31:35,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 07:31:35,596 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:31:35,596 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:31:35,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 07:31:35,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:31:35,811 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:31:35,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:31:35,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1842440164, now seen corresponding path program 1 times [2021-10-13 07:31:35,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:31:35,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1473995919] [2021-10-13 07:31:35,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:31:35,813 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:31:35,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:31:35,814 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:31:35,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 07:31:35,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:31:35,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 07:31:35,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:31:36,206 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 07:31:36,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:31:36,399 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 07:31:36,399 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:31:36,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1473995919] [2021-10-13 07:31:36,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1473995919] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:31:36,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [43960478] [2021-10-13 07:31:36,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:31:36,400 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:31:36,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:31:36,406 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:31:36,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-10-13 07:31:36,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:31:36,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 07:31:36,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:31:36,735 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 07:31:36,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:31:36,809 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 07:31:36,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [43960478] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:31:36,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807632190] [2021-10-13 07:31:36,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:31:36,810 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:31:36,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:31:36,812 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:31:36,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-13 07:31:36,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:31:36,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:31:36,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:31:37,116 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 07:31:37,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:31:37,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:31:37,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807632190] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 07:31:37,195 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-10-13 07:31:37,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 7, 8, 7, 7] total 20 [2021-10-13 07:31:37,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057643425] [2021-10-13 07:31:37,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:31:37,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:31:37,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:31:37,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2021-10-13 07:31:37,198 INFO L87 Difference]: Start difference. First operand 23 states and 26 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 07:31:37,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:31:37,395 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2021-10-13 07:31:37,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 07:31:37,396 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 07:31:37,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:31:37,397 INFO L225 Difference]: With dead ends: 38 [2021-10-13 07:31:37,401 INFO L226 Difference]: Without dead ends: 31 [2021-10-13 07:31:37,401 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 380.5ms TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2021-10-13 07:31:37,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-13 07:31:37,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2021-10-13 07:31:37,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 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 07:31:37,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-10-13 07:31:37,408 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 14 [2021-10-13 07:31:37,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:31:37,409 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-10-13 07:31:37,409 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 07:31:37,409 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-10-13 07:31:37,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 07:31:37,410 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:31:37,410 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:31:37,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 07:31:37,644 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-10-13 07:31:37,827 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2021-10-13 07:31:38,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:31:38,024 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:31:38,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:31:38,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1667884396, now seen corresponding path program 1 times [2021-10-13 07:31:38,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:31:38,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1886283083] [2021-10-13 07:31:38,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:31:38,025 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:31:38,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:31:38,026 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:31:38,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-13 07:31:38,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:31:38,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 07:31:38,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:31:38,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:31:38,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:31:38,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:31:38,573 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:31:38,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1886283083] [2021-10-13 07:31:38,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1886283083] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:31:38,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [819245048] [2021-10-13 07:31:38,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:31:38,575 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:31:38,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:31:38,578 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:31:38,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-10-13 07:31:38,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:31:38,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:31:38,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:31:38,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:31:38,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:31:39,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:31:39,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [819245048] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:31:39,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938621793] [2021-10-13 07:31:39,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:31:39,009 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:31:39,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:31:39,010 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:31:39,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-13 07:31:39,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:31:39,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 07:31:39,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:31:39,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:31:39,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:31:39,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:31:39,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938621793] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:31:39,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:31:39,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7, 6, 8, 6] total 14 [2021-10-13 07:31:39,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886820588] [2021-10-13 07:31:39,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 07:31:39,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:31:39,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 07:31:39,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-10-13 07:31:39,416 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 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 07:31:39,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:31:39,901 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-10-13 07:31:39,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 07:31:39,904 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 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) Word has length 16 [2021-10-13 07:31:39,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:31:39,904 INFO L225 Difference]: With dead ends: 36 [2021-10-13 07:31:39,904 INFO L226 Difference]: Without dead ends: 22 [2021-10-13 07:31:39,905 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 379.8ms TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2021-10-13 07:31:39,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-13 07:31:39,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2021-10-13 07:31:39,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 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 07:31:39,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-10-13 07:31:39,909 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2021-10-13 07:31:39,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:31:39,909 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-10-13 07:31:39,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 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 07:31:39,910 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-10-13 07:31:39,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 07:31:39,910 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:31:39,910 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:31:39,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-13 07:31:40,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-13 07:31:40,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-10-13 07:31:40,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:31:40,521 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:31:40,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:31:40,522 INFO L82 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2021-10-13 07:31:40,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:31:40,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [287731612] [2021-10-13 07:31:40,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:31:40,522 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:31:40,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:31:40,525 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:31:40,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-13 07:31:40,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:31:40,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 07:31:40,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:31:40,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2021-10-13 07:31:40,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:40,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:40,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:40,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:40,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:40,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:40,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:31:40,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 41 [2021-10-13 07:31:40,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:40,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:40,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:31:41,255 INFO L354 Elim1Store]: treesize reduction 742, result has 10.8 percent of original size [2021-10-13 07:31:41,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 22 case distinctions, treesize of input 112 treesize of output 128 [2021-10-13 07:31:42,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:42,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:42,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:42,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:42,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:42,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:42,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:42,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:31:42,670 INFO L354 Elim1Store]: treesize reduction 740, result has 5.5 percent of original size [2021-10-13 07:31:42,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 32 case distinctions, treesize of input 187 treesize of output 159 [2021-10-13 07:31:46,203 INFO L354 Elim1Store]: treesize reduction 406, result has 9.2 percent of original size [2021-10-13 07:31:46,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 6 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 215 treesize of output 137 [2021-10-13 07:31:46,267 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 07:31:46,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:31:55,322 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 07:31:55,322 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:31:55,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [287731612] [2021-10-13 07:31:55,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [287731612] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:31:55,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1669014400] [2021-10-13 07:31:55,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:31:55,323 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:31:55,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:31:55,344 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:31:55,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-10-13 07:31:55,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:31:55,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 07:31:55,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:31:55,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:55,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:55,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:55,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:55,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:31:55,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:55,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:55,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:31:55,903 INFO L354 Elim1Store]: treesize reduction 34, result has 42.4 percent of original size [2021-10-13 07:31:55,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 45 [2021-10-13 07:31:55,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2021-10-13 07:31:56,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:56,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:56,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:56,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:56,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:56,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:56,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:56,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:56,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:56,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:31:56,181 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-10-13 07:31:56,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 91 treesize of output 83 [2021-10-13 07:31:56,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:56,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:56,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:56,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:31:56,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:56,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:56,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:56,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:56,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:31:56,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:31:56,706 INFO L354 Elim1Store]: treesize reduction 62, result has 19.5 percent of original size [2021-10-13 07:31:56,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 149 treesize of output 115 [2021-10-13 07:31:57,713 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-10-13 07:31:57,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 165 treesize of output 97 [2021-10-13 07:31:57,749 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 07:31:57,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:31:58,272 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 07:31:58,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1669014400] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:31:58,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090291585] [2021-10-13 07:31:58,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:31:58,273 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:31:58,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:31:58,288 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:31:58,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-13 07:31:58,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:31:58,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 07:31:58,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:31:58,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:58,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:58,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:58,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:58,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:31:58,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:58,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:58,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:31:58,775 INFO L354 Elim1Store]: treesize reduction 34, result has 42.4 percent of original size [2021-10-13 07:31:58,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 45 [2021-10-13 07:31:58,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2021-10-13 07:31:58,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:58,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:58,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:58,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:58,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:58,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:58,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:58,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:58,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:58,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:31:58,872 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-10-13 07:31:58,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 91 treesize of output 83 [2021-10-13 07:31:59,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:59,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:59,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:59,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:31:59,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:59,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:59,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:59,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:31:59,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:31:59,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:31:59,207 INFO L354 Elim1Store]: treesize reduction 62, result has 19.5 percent of original size [2021-10-13 07:31:59,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 149 treesize of output 115 [2021-10-13 07:31:59,524 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-10-13 07:31:59,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 165 treesize of output 97 [2021-10-13 07:31:59,542 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 07:31:59,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:31:59,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:31:59,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090291585] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:31:59,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:31:59,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8, 7, 9, 7] total 20 [2021-10-13 07:31:59,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208304439] [2021-10-13 07:31:59,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-13 07:31:59,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:31:59,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 07:31:59,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=297, Unknown=2, NotChecked=0, Total=380 [2021-10-13 07:31:59,779 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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 07:32:29,852 WARN L838 $PredicateComparison]: unable to prove that (and (= (let ((.cse0 (let ((.cse1 (select |c_#memory_int| c_ULTIMATE.start_main_~b~0.base)) (.cse2 (bvmul c_ULTIMATE.start_main_~i~0 (_ bv8 32)))) (let ((.cse3 (bvadd (concat (select .cse1 (bvadd (_ bv4294967292 32) .cse2 c_ULTIMATE.start_main_~b~0.offset)) (select .cse1 (bvadd (_ bv4294967288 32) .cse2 c_ULTIMATE.start_main_~b~0.offset))) (let ((.cse4 (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base))) (concat (select .cse4 (bvadd (_ bv4294967292 32) c_ULTIMATE.start_main_~a~0.offset .cse2)) (select .cse4 (bvadd (_ bv4294967288 32) c_ULTIMATE.start_main_~a~0.offset .cse2))))))) (store (store .cse1 (bvadd .cse2 c_ULTIMATE.start_main_~b~0.offset) ((_ extract 31 0) .cse3)) (bvadd (_ bv4 32) .cse2 c_ULTIMATE.start_main_~b~0.offset) ((_ extract 63 32) .cse3)))))) (concat (select .cse0 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~b~0.offset)) (select .cse0 c_ULTIMATE.start_main_~b~0.offset))) ((_ sign_extend 32) (_ bv1 32))) (or (= c_ULTIMATE.start_assume_abort_if_not_~cond (_ bv1 32)) (= c_ULTIMATE.start_assume_abort_if_not_~cond (_ bv0 32))) (forall ((ULTIMATE.start_main_~i~0 (_ BitVec 32))) (= (let ((.cse5 (select (store |c_#memory_int| c_ULTIMATE.start_main_~a~0.base (let ((.cse6 (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base)) (.cse7 (bvmul ULTIMATE.start_main_~i~0 (_ bv8 32)))) (let ((.cse8 (bvadd ((_ sign_extend 32) (_ bv4 32)) (concat (select .cse6 (bvadd (_ bv4294967292 32) c_ULTIMATE.start_main_~a~0.offset .cse7)) (select .cse6 (bvadd (_ bv4294967288 32) c_ULTIMATE.start_main_~a~0.offset .cse7)))))) (store (store .cse6 (bvadd c_ULTIMATE.start_main_~a~0.offset .cse7) ((_ extract 31 0) .cse8)) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~a~0.offset .cse7) ((_ extract 63 32) .cse8))))) c_ULTIMATE.start_main_~b~0.base))) (concat (select .cse5 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~b~0.offset)) (select .cse5 c_ULTIMATE.start_main_~b~0.offset))) ((_ sign_extend 32) (_ bv1 32))))) is different from false [2021-10-13 07:32:50,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:32:50,684 INFO L93 Difference]: Finished difference Result 152 states and 170 transitions. [2021-10-13 07:32:50,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-10-13 07:32:50,685 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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 16 [2021-10-13 07:32:50,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:32:50,688 INFO L225 Difference]: With dead ends: 152 [2021-10-13 07:32:50,688 INFO L226 Difference]: Without dead ends: 150 [2021-10-13 07:32:50,691 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 68 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1296 ImplicationChecksByTransitivity, 45985.3ms TimeCoverageRelationStatistics Valid=878, Invalid=3150, Unknown=8, NotChecked=124, Total=4160 [2021-10-13 07:32:50,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-10-13 07:32:50,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 38. [2021-10-13 07:32:50,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 37 states have internal predecessors, (46), 0 states have call successors, (0), 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 07:32:50,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2021-10-13 07:32:50,706 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 16 [2021-10-13 07:32:50,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:32:50,706 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2021-10-13 07:32:50,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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 07:32:50,707 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2021-10-13 07:32:50,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 07:32:50,708 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:32:50,708 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:32:50,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-13 07:32:50,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-10-13 07:32:51,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2021-10-13 07:32:51,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:32:51,313 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:32:51,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:32:51,313 INFO L82 PathProgramCache]: Analyzing trace with hash 798963152, now seen corresponding path program 1 times [2021-10-13 07:32:51,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:32:51,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [40236604] [2021-10-13 07:32:51,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:32:51,314 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:32:51,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:32:51,315 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:32:51,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-13 07:32:51,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:32:51,692 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 07:32:51,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:32:51,889 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-13 07:32:51,889 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 07:32:51,890 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:32:51,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-13 07:32:52,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:32:52,096 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:32:52,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:32:52 BoogieIcfgContainer [2021-10-13 07:32:52,126 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:32:52,126 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:32:52,126 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:32:52,127 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:32:52,127 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:31:31" (3/4) ... [2021-10-13 07:32:52,129 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 07:32:52,175 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_028d3c56-815a-4aa1-bd83-3b8a79b02bff/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 07:32:52,175 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:32:52,176 INFO L168 Benchmark]: Toolchain (without parser) took 81204.76 ms. Allocated memory was 81.8 MB in the beginning and 104.9 MB in the end (delta: 23.1 MB). Free memory was 48.2 MB in the beginning and 44.0 MB in the end (delta: 4.2 MB). Peak memory consumption was 27.9 MB. Max. memory is 16.1 GB. [2021-10-13 07:32:52,177 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 81.8 MB. Free memory was 64.6 MB in the beginning and 64.5 MB in the end (delta: 69.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:32:52,177 INFO L168 Benchmark]: CACSL2BoogieTranslator took 290.89 ms. Allocated memory is still 81.8 MB. Free memory was 48.0 MB in the beginning and 60.3 MB in the end (delta: -12.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:32:52,178 INFO L168 Benchmark]: Boogie Procedure Inliner took 82.78 ms. Allocated memory is still 81.8 MB. Free memory was 60.1 MB in the beginning and 65.6 MB in the end (delta: -5.4 MB). Peak memory consumption was 2.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:32:52,178 INFO L168 Benchmark]: Boogie Preprocessor took 59.94 ms. Allocated memory is still 81.8 MB. Free memory was 65.6 MB in the beginning and 64.2 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:32:52,179 INFO L168 Benchmark]: RCFGBuilder took 463.38 ms. Allocated memory is still 81.8 MB. Free memory was 64.2 MB in the beginning and 52.5 MB in the end (delta: 11.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:32:52,179 INFO L168 Benchmark]: TraceAbstraction took 80251.52 ms. Allocated memory was 81.8 MB in the beginning and 104.9 MB in the end (delta: 23.1 MB). Free memory was 51.9 MB in the beginning and 47.1 MB in the end (delta: 4.7 MB). Peak memory consumption was 29.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:32:52,180 INFO L168 Benchmark]: Witness Printer took 49.07 ms. Allocated memory is still 104.9 MB. Free memory was 47.1 MB in the beginning and 44.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:32:52,182 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 81.8 MB. Free memory was 64.6 MB in the beginning and 64.5 MB in the end (delta: 69.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 290.89 ms. Allocated memory is still 81.8 MB. Free memory was 48.0 MB in the beginning and 60.3 MB in the end (delta: -12.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 82.78 ms. Allocated memory is still 81.8 MB. Free memory was 60.1 MB in the beginning and 65.6 MB in the end (delta: -5.4 MB). Peak memory consumption was 2.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 59.94 ms. Allocated memory is still 81.8 MB. Free memory was 65.6 MB in the beginning and 64.2 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 463.38 ms. Allocated memory is still 81.8 MB. Free memory was 64.2 MB in the beginning and 52.5 MB in the end (delta: 11.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 80251.52 ms. Allocated memory was 81.8 MB in the beginning and 104.9 MB in the end (delta: 23.1 MB). Free memory was 51.9 MB in the beginning and 47.1 MB in the end (delta: 4.7 MB). Peak memory consumption was 29.5 MB. Max. memory is 16.1 GB. * Witness Printer took 49.07 ms. Allocated memory is still 104.9 MB. Free memory was 47.1 MB in the beginning and 44.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; VAL [N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) VAL [N=2] [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] a[0] = 8 [L32] b[0] = 1 [L34] i=1 VAL [N=2] [L34] COND TRUE i