./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/nsqm-if.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_c3f594ce-285d-490b-a62a-f56f12e121d3/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_c3f594ce-285d-490b-a62a-f56f12e121d3/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c3f594ce-285d-490b-a62a-f56f12e121d3/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c3f594ce-285d-490b-a62a-f56f12e121d3/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/nsqm-if.c -s /tmp/vcloud-vcloud-master/worker/run_dir_c3f594ce-285d-490b-a62a-f56f12e121d3/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c3f594ce-285d-490b-a62a-f56f12e121d3/bin/utaipan --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 e49f24de0e9c0173ffff9cecdad84dcf47643f8f ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_c3f594ce-285d-490b-a62a-f56f12e121d3/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_c3f594ce-285d-490b-a62a-f56f12e121d3/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c3f594ce-285d-490b-a62a-f56f12e121d3/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c3f594ce-285d-490b-a62a-f56f12e121d3/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/nsqm-if.c -s /tmp/vcloud-vcloud-master/worker/run_dir_c3f594ce-285d-490b-a62a-f56f12e121d3/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c3f594ce-285d-490b-a62a-f56f12e121d3/bin/utaipan --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 e49f24de0e9c0173ffff9cecdad84dcf47643f8f ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 16:05:51,745 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 16:05:51,746 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 16:05:51,774 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 16:05:51,774 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 16:05:51,775 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 16:05:51,777 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 16:05:51,780 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 16:05:51,782 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 16:05:51,783 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 16:05:51,785 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 16:05:51,786 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 16:05:51,786 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 16:05:51,788 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 16:05:51,789 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 16:05:51,790 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 16:05:51,791 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 16:05:51,792 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 16:05:51,794 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 16:05:51,797 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 16:05:51,799 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 16:05:51,801 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 16:05:51,802 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 16:05:51,803 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 16:05:51,807 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 16:05:51,807 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 16:05:51,807 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 16:05:51,809 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 16:05:51,809 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 16:05:51,810 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 16:05:51,811 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 16:05:51,812 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 16:05:51,812 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 16:05:51,813 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 16:05:51,814 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 16:05:51,814 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 16:05:51,815 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 16:05:51,815 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 16:05:51,815 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 16:05:51,816 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 16:05:51,816 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 16:05:51,817 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c3f594ce-285d-490b-a62a-f56f12e121d3/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 16:05:51,841 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 16:05:51,841 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 16:05:51,841 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 16:05:51,842 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 16:05:51,842 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 16:05:51,842 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 16:05:51,842 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 16:05:51,842 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 16:05:51,842 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 16:05:51,846 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 16:05:51,846 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 16:05:51,846 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 16:05:51,846 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 16:05:51,846 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 16:05:51,846 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 16:05:51,847 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 16:05:51,847 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 16:05:51,847 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 16:05:51,847 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 16:05:51,847 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 16:05:51,847 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 16:05:51,847 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 16:05:51,848 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 16:05:51,848 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 16:05:51,848 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 16:05:51,848 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 16:05:51,848 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 16:05:51,848 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 16:05:51,848 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 16:05:51,848 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 16:05:51,848 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 16:05:51,849 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 16:05:51,849 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 16:05:51,849 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 16:05:51,849 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 16:05:51,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 16:05:51,849 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 16:05:51,849 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 16:05:51,849 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 16:05:51,850 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-vcloud-master/worker/run_dir_c3f594ce-285d-490b-a62a-f56f12e121d3/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_c3f594ce-285d-490b-a62a-f56f12e121d3/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e49f24de0e9c0173ffff9cecdad84dcf47643f8f [2020-12-09 16:05:52,020 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 16:05:52,035 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 16:05:52,037 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 16:05:52,038 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 16:05:52,038 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 16:05:52,039 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c3f594ce-285d-490b-a62a-f56f12e121d3/bin/utaipan/../../sv-benchmarks/c/array-fpi/nsqm-if.c [2020-12-09 16:05:52,080 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c3f594ce-285d-490b-a62a-f56f12e121d3/bin/utaipan/data/7aec96cde/7b769ecbd9534f12918818f78121d65f/FLAGa30c6a43f [2020-12-09 16:05:52,449 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 16:05:52,449 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c3f594ce-285d-490b-a62a-f56f12e121d3/sv-benchmarks/c/array-fpi/nsqm-if.c [2020-12-09 16:05:52,457 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c3f594ce-285d-490b-a62a-f56f12e121d3/bin/utaipan/data/7aec96cde/7b769ecbd9534f12918818f78121d65f/FLAGa30c6a43f [2020-12-09 16:05:52,473 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c3f594ce-285d-490b-a62a-f56f12e121d3/bin/utaipan/data/7aec96cde/7b769ecbd9534f12918818f78121d65f [2020-12-09 16:05:52,476 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 16:05:52,477 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 16:05:52,478 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 16:05:52,479 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 16:05:52,481 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 16:05:52,482 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:05:52" (1/1) ... [2020-12-09 16:05:52,484 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3937384 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:05:52, skipping insertion in model container [2020-12-09 16:05:52,484 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:05:52" (1/1) ... [2020-12-09 16:05:52,491 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 16:05:52,504 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 16:05:52,610 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_c3f594ce-285d-490b-a62a-f56f12e121d3/sv-benchmarks/c/array-fpi/nsqm-if.c[590,603] [2020-12-09 16:05:52,623 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 16:05:52,630 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 16:05:52,638 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_c3f594ce-285d-490b-a62a-f56f12e121d3/sv-benchmarks/c/array-fpi/nsqm-if.c[590,603] [2020-12-09 16:05:52,644 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 16:05:52,655 INFO L208 MainTranslator]: Completed translation [2020-12-09 16:05:52,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:05:52 WrapperNode [2020-12-09 16:05:52,655 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 16:05:52,656 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 16:05:52,656 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 16:05:52,656 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 16:05:52,662 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:05:52" (1/1) ... [2020-12-09 16:05:52,667 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:05:52" (1/1) ... [2020-12-09 16:05:52,682 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 16:05:52,682 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 16:05:52,682 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 16:05:52,683 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 16:05:52,689 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:05:52" (1/1) ... [2020-12-09 16:05:52,689 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:05:52" (1/1) ... [2020-12-09 16:05:52,690 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:05:52" (1/1) ... [2020-12-09 16:05:52,691 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:05:52" (1/1) ... [2020-12-09 16:05:52,695 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:05:52" (1/1) ... [2020-12-09 16:05:52,698 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:05:52" (1/1) ... [2020-12-09 16:05:52,699 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:05:52" (1/1) ... [2020-12-09 16:05:52,701 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 16:05:52,701 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 16:05:52,701 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 16:05:52,702 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 16:05:52,702 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:05:52" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c3f594ce-285d-490b-a62a-f56f12e121d3/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 16:05:52,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 16:05:52,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 16:05:52,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 16:05:52,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 16:05:52,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 16:05:52,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 16:05:52,754 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 16:05:53,056 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 16:05:53,056 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-09 16:05:53,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:05:53 BoogieIcfgContainer [2020-12-09 16:05:53,058 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 16:05:53,060 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 16:05:53,060 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 16:05:53,063 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 16:05:53,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 04:05:52" (1/3) ... [2020-12-09 16:05:53,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d7491c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:05:53, skipping insertion in model container [2020-12-09 16:05:53,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:05:52" (2/3) ... [2020-12-09 16:05:53,065 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d7491c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:05:53, skipping insertion in model container [2020-12-09 16:05:53,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:05:53" (3/3) ... [2020-12-09 16:05:53,066 INFO L111 eAbstractionObserver]: Analyzing ICFG nsqm-if.c [2020-12-09 16:05:53,079 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 16:05:53,082 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 16:05:53,093 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 16:05:53,116 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 16:05:53,116 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 16:05:53,116 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 16:05:53,116 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 16:05:53,116 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 16:05:53,116 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 16:05:53,116 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 16:05:53,116 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 16:05:53,128 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-12-09 16:05:53,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 16:05:53,132 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:05:53,132 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:05:53,133 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 16:05:53,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:05:53,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1758921741, now seen corresponding path program 1 times [2020-12-09 16:05:53,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:05:53,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083514070] [2020-12-09 16:05:53,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:05:53,232 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 16:05:53,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [328048797] [2020-12-09 16:05:53,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c3f594ce-285d-490b-a62a-f56f12e121d3/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 16:05:53,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:05:53,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 16:05:53,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:05:53,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:05:53,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 16:05:53,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:05:53,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083514070] [2020-12-09 16:05:53,382 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 16:05:53,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328048797] [2020-12-09 16:05:53,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:05:53,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-12-09 16:05:53,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959292009] [2020-12-09 16:05:53,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 16:05:53,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:05:53,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 16:05:53,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 16:05:53,403 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 4 states. [2020-12-09 16:05:53,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:05:53,439 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2020-12-09 16:05:53,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 16:05:53,441 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-09 16:05:53,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:05:53,448 INFO L225 Difference]: With dead ends: 20 [2020-12-09 16:05:53,449 INFO L226 Difference]: Without dead ends: 10 [2020-12-09 16:05:53,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 16:05:53,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-09 16:05:53,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-09 16:05:53,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-09 16:05:53,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2020-12-09 16:05:53,478 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2020-12-09 16:05:53,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:05:53,479 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2020-12-09 16:05:53,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 16:05:53,479 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2020-12-09 16:05:53,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 16:05:53,479 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:05:53,479 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:05:53,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-09 16:05:53,680 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 16:05:53,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:05:53,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1256161657, now seen corresponding path program 1 times [2020-12-09 16:05:53,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:05:53,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168931571] [2020-12-09 16:05:53,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:05:53,702 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 16:05:53,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1793355803] [2020-12-09 16:05:53,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c3f594ce-285d-490b-a62a-f56f12e121d3/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 16:05:53,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:05:53,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 16:05:53,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:05:53,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 16:05:53,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 16:05:53,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 16:05:53,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168931571] [2020-12-09 16:05:53,766 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 16:05:53,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793355803] [2020-12-09 16:05:53,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:05:53,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2020-12-09 16:05:53,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140133957] [2020-12-09 16:05:53,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 16:05:53,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:05:53,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 16:05:53,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 16:05:53,769 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 5 states. [2020-12-09 16:05:53,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:05:53,804 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-12-09 16:05:53,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 16:05:53,804 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-09 16:05:53,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:05:53,805 INFO L225 Difference]: With dead ends: 21 [2020-12-09 16:05:53,805 INFO L226 Difference]: Without dead ends: 16 [2020-12-09 16:05:53,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-09 16:05:53,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-09 16:05:53,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 11. [2020-12-09 16:05:53,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-09 16:05:53,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2020-12-09 16:05:53,808 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2020-12-09 16:05:53,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:05:53,808 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2020-12-09 16:05:53,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 16:05:53,808 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2020-12-09 16:05:53,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 16:05:53,809 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:05:53,809 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:05:54,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 16:05:54,010 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 16:05:54,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:05:54,012 INFO L82 PathProgramCache]: Analyzing trace with hash 285260138, now seen corresponding path program 1 times [2020-12-09 16:05:54,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:05:54,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033911470] [2020-12-09 16:05:54,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:05:54,067 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 16:05:54,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1440634872] [2020-12-09 16:05:54,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c3f594ce-285d-490b-a62a-f56f12e121d3/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 16:05:54,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:05:54,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-09 16:05:54,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:05:54,156 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-09 16:05:54,156 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:05:54,161 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:05:54,161 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:05:54,162 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2020-12-09 16:05:54,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:05:54,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 16:05:54,206 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-09 16:05:54,207 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:05:54,270 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:05:54,273 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:05:54,275 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:05:54,287 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:05:54,325 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:05:54,326 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 51 [2020-12-09 16:05:54,327 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:05:54,332 INFO L443 ElimStorePlain]: Different costs {0=[v_arrayElimCell_1], 2=[v_arrayElimCell_2]} [2020-12-09 16:05:54,354 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse13 (mod (+ c_ULTIMATE.start_main_~i~0 4294967295) 4294967296)) (.cse14 (mod c_ULTIMATE.start_main_~i~0 4294967296))) (let ((.cse3 (<= .cse14 2147483647)) (.cse4 (< 2147483647 .cse13)) (.cse2 (= c_ULTIMATE.start_main_~i~0 0)) (.cse10 (< 2147483647 .cse14)) (.cse7 (<= .cse13 2147483647))) (and (or (forall ((v_prenex_4 Int) (v_prenex_5 Int) (v_prenex_2 Int) (v_prenex_3 (Array Int (Array Int Int))) (v_prenex_1 Int)) (= (select (let ((.cse0 (select v_prenex_3 v_prenex_2))) (store .cse0 (+ (* (mod c_ULTIMATE.start_main_~i~0 4294967296) 8) v_prenex_4 (- 34359738368)) (let ((.cse1 (* (mod (+ c_ULTIMATE.start_main_~i~0 4294967295) 4294967296) 8))) (+ (select .cse0 (+ v_prenex_4 .cse1)) (select (select v_prenex_3 v_prenex_1) (+ v_prenex_5 .cse1)) 2)))) v_prenex_4) (+ c_~N~0 1))) .cse2 .cse3 .cse4) (or (forall ((ULTIMATE.start_main_~b~0.base Int) (ULTIMATE.start_main_~a~0.base Int) (|#memory_int| (Array Int (Array Int Int))) (ULTIMATE.start_main_~a~0.offset Int) (ULTIMATE.start_main_~b~0.offset Int)) (= (select (let ((.cse5 (select |#memory_int| ULTIMATE.start_main_~a~0.base))) (store .cse5 (+ (* (mod c_ULTIMATE.start_main_~i~0 4294967296) 8) ULTIMATE.start_main_~a~0.offset (- 34359738368)) (let ((.cse6 (* (mod (+ c_ULTIMATE.start_main_~i~0 4294967295) 4294967296) 8))) (+ (select (select |#memory_int| ULTIMATE.start_main_~b~0.base) (+ .cse6 ULTIMATE.start_main_~b~0.offset (- 34359738368))) (select .cse5 (+ ULTIMATE.start_main_~a~0.offset .cse6 (- 34359738368))) 2)))) ULTIMATE.start_main_~a~0.offset) (+ c_~N~0 1))) .cse2 .cse3 .cse7) (or (forall ((v_prenex_6 Int) (v_prenex_7 Int) (v_prenex_10 Int) (v_prenex_8 (Array Int (Array Int Int))) (v_prenex_9 Int)) (= (select (let ((.cse8 (select v_prenex_8 v_prenex_7))) (store .cse8 (+ (* (mod c_ULTIMATE.start_main_~i~0 4294967296) 8) v_prenex_9) (let ((.cse9 (* (mod (+ c_ULTIMATE.start_main_~i~0 4294967295) 4294967296) 8))) (+ (select .cse8 (+ .cse9 v_prenex_9)) (select (select v_prenex_8 v_prenex_6) (+ .cse9 v_prenex_10)) 2)))) v_prenex_9) (+ c_~N~0 1))) .cse2 .cse10 .cse4) (or .cse2 (forall ((v_prenex_15 Int) (v_prenex_12 Int) (v_prenex_13 (Array Int (Array Int Int))) (v_prenex_11 Int) (v_prenex_14 Int)) (= (select (let ((.cse11 (select v_prenex_13 v_prenex_12))) (store .cse11 (+ (* (mod c_ULTIMATE.start_main_~i~0 4294967296) 8) v_prenex_14) (let ((.cse12 (* (mod (+ c_ULTIMATE.start_main_~i~0 4294967295) 4294967296) 8))) (+ (select (select v_prenex_13 v_prenex_11) (+ v_prenex_15 .cse12 (- 34359738368))) (select .cse11 (+ v_prenex_14 .cse12 (- 34359738368))) 2)))) v_prenex_14) (+ c_~N~0 1))) .cse10 .cse7)))) is different from false [2020-12-09 16:05:54,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2020-12-09 16:05:54,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033911470] [2020-12-09 16:05:54,365 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 16:05:54,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440634872] [2020-12-09 16:05:54,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [686641712] [2020-12-09 16:05:54,380 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2020-12-09 16:05:54,380 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 16:05:54,383 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 16:05:54,387 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 16:05:54,387 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 16:05:54,517 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 16:05:54,883 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 16:05:54,960 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 16:05:54,985 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 16:05:55,001 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 16:05:55,176 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 16:05:55,203 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 16:05:55,228 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 16:05:55,341 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 16:05:55,353 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 16:05:55,364 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 16:05:55,391 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 16:05:55,541 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 16:05:55,594 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 16:05:55,614 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 16:05:55,639 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 16:05:55,791 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2020-12-09 16:05:55,916 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-12-09 16:05:56,061 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2020-12-09 16:05:56,320 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2020-12-09 16:05:56,321 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 16:05:56,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 16:05:56,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2020-12-09 16:05:56,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944772381] [2020-12-09 16:05:56,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-09 16:05:56,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:05:56,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-09 16:05:56,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=189, Unknown=1, NotChecked=28, Total=272 [2020-12-09 16:05:56,323 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 12 states. [2020-12-09 16:08:45,944 WARN L197 SmtUtils]: Spent 2.82 m on a formula simplification that was a NOOP. DAG size: 33 [2020-12-09 16:08:46,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:08:46,061 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2020-12-09 16:08:46,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-09 16:08:46,062 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 9 [2020-12-09 16:08:46,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:08:46,063 INFO L225 Difference]: With dead ends: 47 [2020-12-09 16:08:46,063 INFO L226 Difference]: Without dead ends: 45 [2020-12-09 16:08:46,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 170.3s TimeCoverageRelationStatistics Valid=145, Invalid=560, Unknown=1, NotChecked=50, Total=756 [2020-12-09 16:08:46,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-09 16:08:46,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 14. [2020-12-09 16:08:46,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-09 16:08:46,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2020-12-09 16:08:46,067 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 9 [2020-12-09 16:08:46,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:08:46,068 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2020-12-09 16:08:46,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-09 16:08:46,068 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2020-12-09 16:08:46,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 16:08:46,068 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:08:46,068 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:08:46,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 16:08:46,269 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 16:08:46,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:08:46,271 INFO L82 PathProgramCache]: Analyzing trace with hash 252084121, now seen corresponding path program 2 times [2020-12-09 16:08:46,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:08:46,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462557205] [2020-12-09 16:08:46,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:08:46,320 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 16:08:46,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [485836096] [2020-12-09 16:08:46,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c3f594ce-285d-490b-a62a-f56f12e121d3/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 16:08:46,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-09 16:08:46,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 16:08:46,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 16:08:46,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:08:46,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:08:46,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 16:08:46,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:08:46,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462557205] [2020-12-09 16:08:46,415 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 16:08:46,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485836096] [2020-12-09 16:08:46,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1990715142] [2020-12-09 16:08:46,418 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2020-12-09 16:08:46,418 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 16:08:46,418 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 16:08:46,418 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 16:08:46,418 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 16:08:46,470 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 16:08:46,725 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 16:08:46,740 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 16:08:46,755 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 16:08:46,769 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 16:08:46,936 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 16:08:46,958 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 16:08:46,997 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 16:08:47,089 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 16:08:47,123 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 16:08:47,153 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 16:08:47,161 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 16:08:47,249 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 16:08:47,293 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 16:08:47,308 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 16:08:47,325 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 16:08:47,465 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2020-12-09 16:08:47,690 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2020-12-09 16:08:47,844 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 16:08:47,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 16:08:47,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-12-09 16:08:47,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91418126] [2020-12-09 16:08:47,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 16:08:47,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:08:47,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 16:08:47,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-12-09 16:08:47,846 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand 8 states. [2020-12-09 16:08:47,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:08:47,919 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-12-09 16:08:47,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 16:08:47,920 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2020-12-09 16:08:47,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:08:47,920 INFO L225 Difference]: With dead ends: 35 [2020-12-09 16:08:47,920 INFO L226 Difference]: Without dead ends: 23 [2020-12-09 16:08:47,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-12-09 16:08:47,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-09 16:08:47,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 13. [2020-12-09 16:08:47,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-09 16:08:47,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2020-12-09 16:08:47,923 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2020-12-09 16:08:47,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:08:47,923 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2020-12-09 16:08:47,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 16:08:47,923 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2020-12-09 16:08:47,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 16:08:47,924 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:08:47,924 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:08:48,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 16:08:48,126 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 16:08:48,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:08:48,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1950532691, now seen corresponding path program 3 times [2020-12-09 16:08:48,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:08:48,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659147568] [2020-12-09 16:08:48,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:08:48,175 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 16:08:48,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [247948316] [2020-12-09 16:08:48,175 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c3f594ce-285d-490b-a62a-f56f12e121d3/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 16:08:48,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-09 16:08:48,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 16:08:48,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-09 16:08:48,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:08:48,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 16:08:48,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 16:08:48,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659147568] [2020-12-09 16:08:48,616 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 16:08:48,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247948316] [2020-12-09 16:08:48,616 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: incompatible size [2020-12-09 16:08:48,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2004468602] [2020-12-09 16:08:48,619 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2020-12-09 16:08:48,619 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 16:08:48,619 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 16:08:48,619 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 16:08:48,619 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 16:08:48,626 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@5c3eb9e9 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker.assertLhs(IncrementalPlicationChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker.checkPlication(IncrementalPlicationChecker.java:135) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.ArrayIndexEqualityManager.(ArrayIndexEqualityManager.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.computeCostEstimation(ElimStorePlain.java:568) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:441) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:239) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.quantifier(PartialQuantifierElimination.java:153) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:279) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) 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:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2020-12-09 16:08:48,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:08:48,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-09 16:08:48,628 ERROR L205 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2020-12-09 16:08:48,628 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 16:08:48,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 16:08:48,844 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-12-09 16:08:48,844 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-12-09 16:08:48,845 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-12-09 16:08:48,845 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-12-09 16:08:48,846 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-12-09 16:08:48,846 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-12-09 16:08:48,847 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-12-09 16:08:48,847 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-12-09 16:08:48,848 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-12-09 16:08:48,848 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-12-09 16:08:48,849 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-12-09 16:08:48,849 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-12-09 16:08:48,850 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-12-09 16:08:48,850 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-12-09 16:08:48,876 WARN L254 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-09 16:08:48,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 04:08:48 BoogieIcfgContainer [2020-12-09 16:08:48,877 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 16:08:48,878 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 16:08:48,878 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 16:08:48,879 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 16:08:48,880 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:05:53" (3/4) ... [2020-12-09 16:08:48,888 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 16:08:48,889 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 16:08:48,891 INFO L168 Benchmark]: Toolchain (without parser) took 176412.31 ms. Allocated memory was 119.5 MB in the beginning and 174.1 MB in the end (delta: 54.5 MB). Free memory was 99.7 MB in the beginning and 76.9 MB in the end (delta: 22.8 MB). Peak memory consumption was 76.6 MB. Max. memory is 16.1 GB. [2020-12-09 16:08:48,892 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 79.7 MB. Free memory was 55.2 MB in the beginning and 55.1 MB in the end (delta: 78.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 16:08:48,893 INFO L168 Benchmark]: CACSL2BoogieTranslator took 177.15 ms. Allocated memory is still 119.5 MB. Free memory was 99.7 MB in the beginning and 89.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 16:08:48,894 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.74 ms. Allocated memory is still 119.5 MB. Free memory was 89.7 MB in the beginning and 88.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 16:08:48,895 INFO L168 Benchmark]: Boogie Preprocessor took 18.41 ms. Allocated memory is still 119.5 MB. Free memory was 87.6 MB in the beginning and 86.6 MB in the end (delta: 949.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 16:08:48,896 INFO L168 Benchmark]: RCFGBuilder took 357.12 ms. Allocated memory is still 119.5 MB. Free memory was 86.6 MB in the beginning and 59.3 MB in the end (delta: 27.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. [2020-12-09 16:08:48,898 INFO L168 Benchmark]: TraceAbstraction took 175817.34 ms. Allocated memory was 119.5 MB in the beginning and 174.1 MB in the end (delta: 54.5 MB). Free memory was 58.7 MB in the beginning and 76.9 MB in the end (delta: -18.2 MB). Peak memory consumption was 36.8 MB. Max. memory is 16.1 GB. [2020-12-09 16:08:48,899 INFO L168 Benchmark]: Witness Printer took 10.60 ms. Allocated memory is still 174.1 MB. Free memory is still 76.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 16:08:48,905 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 79.7 MB. Free memory was 55.2 MB in the beginning and 55.1 MB in the end (delta: 78.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 177.15 ms. Allocated memory is still 119.5 MB. Free memory was 99.7 MB in the beginning and 89.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 25.74 ms. Allocated memory is still 119.5 MB. Free memory was 89.7 MB in the beginning and 88.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.41 ms. Allocated memory is still 119.5 MB. Free memory was 87.6 MB in the beginning and 86.6 MB in the end (delta: 949.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 357.12 ms. Allocated memory is still 119.5 MB. Free memory was 86.6 MB in the beginning and 59.3 MB in the end (delta: 27.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 175817.34 ms. Allocated memory was 119.5 MB in the beginning and 174.1 MB in the end (delta: 54.5 MB). Free memory was 58.7 MB in the beginning and 76.9 MB in the end (delta: -18.2 MB). Peak memory consumption was 36.8 MB. Max. memory is 16.1 GB. * Witness Printer took 10.60 ms. Allocated memory is still 174.1 MB. Free memory is still 76.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 15]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND TRUE !cond [L27] long long i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] i=0 [L31] COND TRUE i main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_c3f594ce-285d-490b-a62a-f56f12e121d3/bin/utaipan 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 -> e49f24de0e9c0173ffff9cecdad84dcf47643f8f [2020-12-09 16:08:50,826 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 16:08:50,840 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 16:08:50,842 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 16:08:50,843 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 16:08:50,843 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 16:08:50,844 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c3f594ce-285d-490b-a62a-f56f12e121d3/bin/utaipan/../../sv-benchmarks/c/array-fpi/nsqm-if.c [2020-12-09 16:08:50,885 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c3f594ce-285d-490b-a62a-f56f12e121d3/bin/utaipan/data/dffac2d6d/0376875767774aaaa702958df169206c/FLAG7441d39b7 [2020-12-09 16:08:51,185 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 16:08:51,186 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c3f594ce-285d-490b-a62a-f56f12e121d3/sv-benchmarks/c/array-fpi/nsqm-if.c [2020-12-09 16:08:51,191 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c3f594ce-285d-490b-a62a-f56f12e121d3/bin/utaipan/data/dffac2d6d/0376875767774aaaa702958df169206c/FLAG7441d39b7 [2020-12-09 16:08:51,611 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c3f594ce-285d-490b-a62a-f56f12e121d3/bin/utaipan/data/dffac2d6d/0376875767774aaaa702958df169206c [2020-12-09 16:08:51,613 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 16:08:51,614 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 16:08:51,616 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 16:08:51,616 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 16:08:51,618 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 16:08:51,619 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:08:51" (1/1) ... [2020-12-09 16:08:51,621 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b5883b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:08:51, skipping insertion in model container [2020-12-09 16:08:51,621 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:08:51" (1/1) ... [2020-12-09 16:08:51,628 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 16:08:51,639 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 16:08:51,749 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_c3f594ce-285d-490b-a62a-f56f12e121d3/sv-benchmarks/c/array-fpi/nsqm-if.c[590,603] [2020-12-09 16:08:51,769 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 16:08:51,782 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 16:08:51,791 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_c3f594ce-285d-490b-a62a-f56f12e121d3/sv-benchmarks/c/array-fpi/nsqm-if.c[590,603] [2020-12-09 16:08:51,801 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 16:08:51,813 INFO L208 MainTranslator]: Completed translation [2020-12-09 16:08:51,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:08:51 WrapperNode [2020-12-09 16:08:51,814 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 16:08:51,815 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 16:08:51,815 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 16:08:51,815 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 16:08:51,820 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:08:51" (1/1) ... [2020-12-09 16:08:51,827 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:08:51" (1/1) ... [2020-12-09 16:08:51,854 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 16:08:51,854 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 16:08:51,854 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 16:08:51,854 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 16:08:51,861 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:08:51" (1/1) ... [2020-12-09 16:08:51,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:08:51" (1/1) ... [2020-12-09 16:08:51,863 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:08:51" (1/1) ... [2020-12-09 16:08:51,863 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:08:51" (1/1) ... [2020-12-09 16:08:51,869 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:08:51" (1/1) ... [2020-12-09 16:08:51,872 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:08:51" (1/1) ... [2020-12-09 16:08:51,873 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:08:51" (1/1) ... [2020-12-09 16:08:51,875 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 16:08:51,876 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 16:08:51,876 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 16:08:51,876 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 16:08:51,876 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:08:51" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c3f594ce-285d-490b-a62a-f56f12e121d3/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 16:08:51,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 16:08:51,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 16:08:51,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2020-12-09 16:08:51,939 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 16:08:51,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 16:08:51,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 16:08:51,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2020-12-09 16:08:52,286 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 16:08:52,286 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-09 16:08:52,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:08:52 BoogieIcfgContainer [2020-12-09 16:08:52,288 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 16:08:52,290 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 16:08:52,290 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 16:08:52,293 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 16:08:52,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 04:08:51" (1/3) ... [2020-12-09 16:08:52,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@708c791e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:08:52, skipping insertion in model container [2020-12-09 16:08:52,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:08:51" (2/3) ... [2020-12-09 16:08:52,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@708c791e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:08:52, skipping insertion in model container [2020-12-09 16:08:52,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:08:52" (3/3) ... [2020-12-09 16:08:52,296 INFO L111 eAbstractionObserver]: Analyzing ICFG nsqm-if.c [2020-12-09 16:08:52,309 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 16:08:52,311 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 16:08:52,321 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 16:08:52,338 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 16:08:52,338 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 16:08:52,338 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 16:08:52,338 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 16:08:52,338 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 16:08:52,338 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 16:08:52,339 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 16:08:52,339 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 16:08:52,350 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-12-09 16:08:52,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 16:08:52,353 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:08:52,353 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:08:52,354 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 16:08:52,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:08:52,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1670316217, now seen corresponding path program 1 times [2020-12-09 16:08:52,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:08:52,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1080660910] [2020-12-09 16:08:52,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c3f594ce-285d-490b-a62a-f56f12e121d3/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-12-09 16:08:52,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:08:52,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-09 16:08:52,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:08:52,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:08:52,495 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 16:08:52,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1080660910] [2020-12-09 16:08:52,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:08:52,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 16:08:52,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921046221] [2020-12-09 16:08:52,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 16:08:52,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:08:52,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 16:08:52,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 16:08:52,511 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2020-12-09 16:08:52,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:08:52,522 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2020-12-09 16:08:52,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 16:08:52,523 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-12-09 16:08:52,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:08:52,528 INFO L225 Difference]: With dead ends: 42 [2020-12-09 16:08:52,528 INFO L226 Difference]: Without dead ends: 19 [2020-12-09 16:08:52,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 16:08:52,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-09 16:08:52,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-09 16:08:52,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-09 16:08:52,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2020-12-09 16:08:52,551 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2020-12-09 16:08:52,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:08:52,551 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-12-09 16:08:52,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 16:08:52,551 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-12-09 16:08:52,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 16:08:52,552 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:08:52,552 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:08:52,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 16:08:52,753 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 16:08:52,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:08:52,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1000416578, now seen corresponding path program 1 times [2020-12-09 16:08:52,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:08:52,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [144879677] [2020-12-09 16:08:52,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c3f594ce-285d-490b-a62a-f56f12e121d3/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-12-09 16:08:52,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:08:52,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 16:08:52,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:08:52,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:08:52,972 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 16:08:52,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [144879677] [2020-12-09 16:08:52,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:08:52,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 16:08:52,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987210100] [2020-12-09 16:08:52,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 16:08:52,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:08:52,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 16:08:52,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 16:08:52,976 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 5 states. [2020-12-09 16:08:53,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:08:53,253 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2020-12-09 16:08:53,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 16:08:53,260 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-09 16:08:53,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:08:53,260 INFO L225 Difference]: With dead ends: 45 [2020-12-09 16:08:53,261 INFO L226 Difference]: Without dead ends: 31 [2020-12-09 16:08:53,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-09 16:08:53,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-09 16:08:53,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2020-12-09 16:08:53,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-09 16:08:53,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-12-09 16:08:53,265 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2020-12-09 16:08:53,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:08:53,265 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-12-09 16:08:53,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 16:08:53,265 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-12-09 16:08:53,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 16:08:53,266 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:08:53,266 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:08:53,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 16:08:53,468 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 16:08:53,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:08:53,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1992201947, now seen corresponding path program 1 times [2020-12-09 16:08:53,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:08:53,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [868988233] [2020-12-09 16:08:53,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c3f594ce-285d-490b-a62a-f56f12e121d3/bin/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-12-09 16:08:53,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:08:53,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-09 16:08:53,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:08:53,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 16:08:53,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 16:08:53,777 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 25 [2020-12-09 16:08:53,778 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:08:53,798 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:08:53,799 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:08:53,799 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:40 [2020-12-09 16:08:53,943 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 16:08:53,955 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 16:08:53,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:08:53,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 16:08:54,977 WARN L197 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-12-09 16:08:55,202 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 73 [2020-12-09 16:08:55,217 INFO L348 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2020-12-09 16:08:55,217 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1890 treesize of output 1754 [2020-12-09 16:08:55,244 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:55,246 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:55,251 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:55,252 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:55,255 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:55,259 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:55,260 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:55,265 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 16:08:55,270 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:55,275 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:55,278 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 16:08:55,287 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:55,289 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 16:08:55,299 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:55,303 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:55,304 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:55,307 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:55,308 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:55,314 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:55,315 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:55,317 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:55,318 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:55,319 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:55,325 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:55,326 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:55,328 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:55,330 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:55,332 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 16:08:55,334 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:55,337 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 16:08:55,344 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:55,345 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:55,347 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:55,349 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:55,350 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:55,351 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:55,353 INFO L547 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-09 16:08:55,372 INFO L625 ElimStorePlain]: treesize reduction 138, result has 18.8 percent of original size [2020-12-09 16:08:55,372 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:08:55,378 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:08:55,378 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:08:55,379 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:77, output treesize:32 [2020-12-09 16:08:57,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:08:57,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [868988233] [2020-12-09 16:08:57,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1391922035] [2020-12-09 16:08:57,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c3f594ce-285d-490b-a62a-f56f12e121d3/bin/utaipan/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt [2020-12-09 16:08:57,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:08:57,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-09 16:08:57,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:08:57,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 16:08:57,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 16:08:57,928 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 25 [2020-12-09 16:08:57,929 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:08:57,949 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:08:57,950 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:08:57,951 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:40 [2020-12-09 16:08:57,970 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 16:08:57,973 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 16:08:57,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:08:57,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 16:08:58,008 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 73 [2020-12-09 16:08:58,017 INFO L348 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2020-12-09 16:08:58,018 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1890 treesize of output 1754 [2020-12-09 16:08:58,029 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,030 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,033 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,034 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,035 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,036 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,038 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,039 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 16:08:58,041 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,042 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,044 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 16:08:58,049 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,051 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,052 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,054 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,054 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,057 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,058 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,061 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,062 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,066 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,067 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,072 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,073 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,074 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,075 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,078 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,080 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 16:08:58,082 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,084 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,086 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 16:08:58,093 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,097 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,098 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,100 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,101 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,104 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,106 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,111 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,112 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,114 INFO L547 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-09 16:08:58,138 INFO L625 ElimStorePlain]: treesize reduction 138, result has 18.8 percent of original size [2020-12-09 16:08:58,138 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:08:58,142 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:08:58,143 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:08:58,143 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:77, output treesize:32 [2020-12-09 16:08:58,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:08:58,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318655711] [2020-12-09 16:08:58,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c3f594ce-285d-490b-a62a-f56f12e121d3/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 16:08:58,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:08:58,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-09 16:08:58,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:08:58,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 16:08:58,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 16:08:58,309 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 25 [2020-12-09 16:08:58,310 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:08:58,331 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:08:58,332 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:08:58,333 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:40 [2020-12-09 16:08:58,347 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 16:08:58,350 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 16:08:58,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:08:58,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 16:08:58,379 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 73 [2020-12-09 16:08:58,389 INFO L348 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2020-12-09 16:08:58,389 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 942 treesize of output 874 [2020-12-09 16:08:58,396 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,396 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,398 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,399 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,400 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,401 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,402 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,403 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 16:08:58,404 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,405 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,406 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 16:08:58,407 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,409 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 16:08:58,413 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,416 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,420 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,422 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,423 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,427 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,427 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,429 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,430 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,431 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,433 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,434 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,435 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 16:08:58,436 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,437 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,441 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,442 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,443 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,444 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 16:08:58,445 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,449 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,451 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,453 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 16:08:58,456 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,458 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,460 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,461 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 16:08:58,462 INFO L547 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-09 16:08:58,478 INFO L625 ElimStorePlain]: treesize reduction 138, result has 18.8 percent of original size [2020-12-09 16:08:58,479 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:08:58,481 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:08:58,482 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:08:58,482 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:77, output treesize:32 [2020-12-09 16:08:58,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:08:58,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 16:08:58,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 9, 8, 10, 8] total 19 [2020-12-09 16:08:58,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550147441] [2020-12-09 16:08:58,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-09 16:08:58,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:08:58,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-09 16:08:58,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2020-12-09 16:08:58,499 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 19 states. [2020-12-09 16:09:01,478 WARN L197 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2020-12-09 16:09:05,463 WARN L197 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-12-09 16:09:06,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:09:06,426 INFO L93 Difference]: Finished difference Result 70 states and 85 transitions. [2020-12-09 16:09:06,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-09 16:09:06,433 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 18 [2020-12-09 16:09:06,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:09:06,433 INFO L225 Difference]: With dead ends: 70 [2020-12-09 16:09:06,433 INFO L226 Difference]: Without dead ends: 43 [2020-12-09 16:09:06,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 85 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-12-09 16:09:06,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-09 16:09:06,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2020-12-09 16:09:06,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-09 16:09:06,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-12-09 16:09:06,438 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 18 [2020-12-09 16:09:06,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:09:06,439 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-12-09 16:09:06,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-09 16:09:06,439 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-12-09 16:09:06,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-09 16:09:06,439 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:09:06,439 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:09:07,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 cvc4 --incremental --print-success --lang smt [2020-12-09 16:09:07,042 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 16:09:07,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:09:07,044 INFO L82 PathProgramCache]: Analyzing trace with hash 939318754, now seen corresponding path program 1 times [2020-12-09 16:09:07,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:09:07,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1286117882] [2020-12-09 16:09:07,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c3f594ce-285d-490b-a62a-f56f12e121d3/bin/utaipan/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-12-09 16:09:07,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:09:07,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-09 16:09:07,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:09:07,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 16:09:07,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 16:09:07,443 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 25 [2020-12-09 16:09:07,444 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:09:07,473 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 16:09:07,474 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 16:09:07,474 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:50 [2020-12-09 16:09:07,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 16:09:07,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 16:09:07,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 16:09:07,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 16:09:07,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 16:09:07,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 16:09:07,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 16:09:07,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 16:09:07,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 16:09:07,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 16:09:07,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 16:09:07,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 16:09:07,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 16:09:07,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 16:09:07,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 16:09:07,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 16:09:07,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 16:09:07,654 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-09 16:09:07,654 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-09 16:09:07,655 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-09 16:09:07,656 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-09 16:09:07,698 INFO L348 Elim1Store]: treesize reduction 16, result has 59.0 percent of original size [2020-12-09 16:09:07,699 INFO L382 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 15 case distinctions, treesize of input 192 treesize of output 173 [2020-12-09 16:09:07,701 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 16:09:07,841 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2020-12-09 16:09:07,842 INFO L625 ElimStorePlain]: treesize reduction 122, result has 65.4 percent of original size [2020-12-09 16:09:07,843 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 16:09:07,843 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:210, output treesize:231 [2020-12-09 16:09:08,155 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 16:09:08,157 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 16:09:08,159 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-09 16:09:08,208 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:09:08,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 16:09:09,184 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-12-09 16:09:17,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1286117882] [2020-12-09 16:09:17,009 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: incompatible size [2020-12-09 16:09:17,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [606378696] [2020-12-09 16:09:17,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c3f594ce-285d-490b-a62a-f56f12e121d3/bin/utaipan/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt [2020-12-09 16:09:17,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:09:17,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-09 16:09:17,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:09:17,308 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@7fa8a720 [2020-12-09 16:09:17,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849507054] [2020-12-09 16:09:17,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c3f594ce-285d-490b-a62a-f56f12e121d3/bin/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 16:09:17,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:09:17,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-09 16:09:17,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:09:17,444 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@7fa8a720 [2020-12-09 16:09:17,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:09:17,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-09 16:09:17,445 ERROR L205 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2020-12-09 16:09:17,445 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 16:09:18,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 mathsat -unsat_core_generation=3,8 cvc4 --incremental --print-success --lang smt [2020-12-09 16:09:18,069 WARN L254 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-09 16:09:18,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 04:09:18 BoogieIcfgContainer [2020-12-09 16:09:18,070 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 16:09:18,070 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 16:09:18,070 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 16:09:18,070 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 16:09:18,071 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:08:52" (3/4) ... [2020-12-09 16:09:18,073 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 16:09:18,073 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 16:09:18,074 INFO L168 Benchmark]: Toolchain (without parser) took 26459.27 ms. Allocated memory was 54.5 MB in the beginning and 81.8 MB in the end (delta: 27.3 MB). Free memory was 33.2 MB in the beginning and 23.9 MB in the end (delta: 9.2 MB). Peak memory consumption was 36.1 MB. Max. memory is 16.1 GB. [2020-12-09 16:09:18,078 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 54.5 MB. Free memory was 37.1 MB in the beginning and 37.1 MB in the end (delta: 71.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 16:09:18,079 INFO L168 Benchmark]: CACSL2BoogieTranslator took 198.30 ms. Allocated memory is still 54.5 MB. Free memory was 32.9 MB in the beginning and 35.8 MB in the end (delta: -2.9 MB). Peak memory consumption was 9.3 MB. Max. memory is 16.1 GB. [2020-12-09 16:09:18,080 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.03 ms. Allocated memory was 54.5 MB in the beginning and 81.8 MB in the end (delta: 27.3 MB). Free memory was 35.6 MB in the beginning and 66.3 MB in the end (delta: -30.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 16:09:18,080 INFO L168 Benchmark]: Boogie Preprocessor took 20.92 ms. Allocated memory is still 81.8 MB. Free memory was 66.3 MB in the beginning and 64.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 16:09:18,080 INFO L168 Benchmark]: RCFGBuilder took 412.41 ms. Allocated memory is still 81.8 MB. Free memory was 64.9 MB in the beginning and 48.4 MB in the end (delta: 16.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-12-09 16:09:18,081 INFO L168 Benchmark]: TraceAbstraction took 25780.02 ms. Allocated memory is still 81.8 MB. Free memory was 47.8 MB in the beginning and 24.2 MB in the end (delta: 23.7 MB). Peak memory consumption was 24.5 MB. Max. memory is 16.1 GB. [2020-12-09 16:09:18,081 INFO L168 Benchmark]: Witness Printer took 2.99 ms. Allocated memory is still 81.8 MB. Free memory was 24.2 MB in the beginning and 23.9 MB in the end (delta: 210.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 16:09:18,084 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 54.5 MB. Free memory was 37.1 MB in the beginning and 37.1 MB in the end (delta: 71.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 198.30 ms. Allocated memory is still 54.5 MB. Free memory was 32.9 MB in the beginning and 35.8 MB in the end (delta: -2.9 MB). Peak memory consumption was 9.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.03 ms. Allocated memory was 54.5 MB in the beginning and 81.8 MB in the end (delta: 27.3 MB). Free memory was 35.6 MB in the beginning and 66.3 MB in the end (delta: -30.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.92 ms. Allocated memory is still 81.8 MB. Free memory was 66.3 MB in the beginning and 64.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 412.41 ms. Allocated memory is still 81.8 MB. Free memory was 64.9 MB in the beginning and 48.4 MB in the end (delta: 16.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 25780.02 ms. Allocated memory is still 81.8 MB. Free memory was 47.8 MB in the beginning and 24.2 MB in the end (delta: 23.7 MB). Peak memory consumption was 24.5 MB. Max. memory is 16.1 GB. * Witness Printer took 2.99 ms. Allocated memory is still 81.8 MB. Free memory was 24.2 MB in the beginning and 23.9 MB in the end (delta: 210.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 15]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) [L27] long long i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] i=0 [L31] COND TRUE i