./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/rangesum60.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/reducercommutativity/rangesum60.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V --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 6531e15623308e4078ac0600b5852029139b0fe65df20988c6e3b5d5367f33f6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 01:52:50,057 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 01:52:50,059 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 01:52:50,097 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 01:52:50,098 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 01:52:50,100 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 01:52:50,102 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 01:52:50,105 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 01:52:50,107 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 01:52:50,109 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 01:52:50,113 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 01:52:50,119 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 01:52:50,120 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 01:52:50,128 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 01:52:50,131 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 01:52:50,133 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 01:52:50,134 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 01:52:50,135 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 01:52:50,138 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 01:52:50,140 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 01:52:50,146 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 01:52:50,148 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 01:52:50,154 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 01:52:50,155 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 01:52:50,165 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 01:52:50,165 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 01:52:50,165 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 01:52:50,167 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 01:52:50,167 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 01:52:50,168 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 01:52:50,169 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 01:52:50,170 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 01:52:50,171 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 01:52:50,172 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 01:52:50,173 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 01:52:50,173 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 01:52:50,174 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 01:52:50,174 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 01:52:50,174 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 01:52:50,175 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 01:52:50,176 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 01:52:50,177 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 01:52:50,205 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 01:52:50,205 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 01:52:50,210 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 01:52:50,210 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 01:52:50,214 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 01:52:50,214 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 01:52:50,215 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 01:52:50,215 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 01:52:50,215 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 01:52:50,215 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 01:52:50,216 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 01:52:50,216 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 01:52:50,216 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 01:52:50,217 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 01:52:50,218 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 01:52:50,218 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 01:52:50,218 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 01:52:50,218 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 01:52:50,219 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 01:52:50,220 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 01:52:50,221 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 01:52:50,221 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 01:52:50,221 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 01:52:50,221 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 01:52:50,222 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 01:52:50,222 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 01:52:50,223 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 01:52:50,224 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 01:52:50,224 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 01:52:50,224 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 01:52:50,225 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 01:52:50,225 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 01:52:50,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 01:52:50,226 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 01:52:50,226 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 01:52:50,226 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 01:52:50,226 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 01:52:50,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 01:52:50,227 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 01:52:50,227 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 01:52:50,227 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 01:52:50,227 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6531e15623308e4078ac0600b5852029139b0fe65df20988c6e3b5d5367f33f6 [2021-11-23 01:52:50,527 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 01:52:50,553 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 01:52:50,556 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 01:52:50,557 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 01:52:50,558 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 01:52:50,559 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/reducercommutativity/rangesum60.i [2021-11-23 01:52:50,644 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/data/2ab2665fb/b09885213aba44f1a1e27f947f4bd054/FLAGcdb9252eb [2021-11-23 01:52:51,129 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 01:52:51,130 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/sv-benchmarks/c/reducercommutativity/rangesum60.i [2021-11-23 01:52:51,136 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/data/2ab2665fb/b09885213aba44f1a1e27f947f4bd054/FLAGcdb9252eb [2021-11-23 01:52:51,495 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/data/2ab2665fb/b09885213aba44f1a1e27f947f4bd054 [2021-11-23 01:52:51,499 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 01:52:51,501 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 01:52:51,506 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 01:52:51,506 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 01:52:51,509 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 01:52:51,511 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:52:51" (1/1) ... [2021-11-23 01:52:51,512 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fb2ca4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:51, skipping insertion in model container [2021-11-23 01:52:51,513 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:52:51" (1/1) ... [2021-11-23 01:52:51,520 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 01:52:51,535 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 01:52:51,742 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/sv-benchmarks/c/reducercommutativity/rangesum60.i[1465,1478] [2021-11-23 01:52:51,751 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 01:52:51,758 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 01:52:51,795 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/sv-benchmarks/c/reducercommutativity/rangesum60.i[1465,1478] [2021-11-23 01:52:51,798 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 01:52:51,812 INFO L208 MainTranslator]: Completed translation [2021-11-23 01:52:51,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:51 WrapperNode [2021-11-23 01:52:51,812 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 01:52:51,813 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 01:52:51,814 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 01:52:51,814 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 01:52:51,821 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:51" (1/1) ... [2021-11-23 01:52:51,838 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:51" (1/1) ... [2021-11-23 01:52:51,864 INFO L137 Inliner]: procedures = 17, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2021-11-23 01:52:51,865 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 01:52:51,866 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 01:52:51,866 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 01:52:51,867 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 01:52:51,875 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:51" (1/1) ... [2021-11-23 01:52:51,875 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:51" (1/1) ... [2021-11-23 01:52:51,881 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:51" (1/1) ... [2021-11-23 01:52:51,881 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:51" (1/1) ... [2021-11-23 01:52:51,898 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:51" (1/1) ... [2021-11-23 01:52:51,903 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:51" (1/1) ... [2021-11-23 01:52:51,904 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:51" (1/1) ... [2021-11-23 01:52:51,907 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 01:52:51,908 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 01:52:51,908 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 01:52:51,908 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 01:52:51,909 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:51" (1/1) ... [2021-11-23 01:52:51,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 01:52:51,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:52:51,934 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 01:52:51,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 01:52:51,967 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 01:52:51,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 01:52:51,968 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 01:52:51,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 01:52:51,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 01:52:51,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 01:52:51,968 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 01:52:51,968 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2021-11-23 01:52:51,968 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2021-11-23 01:52:51,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 01:52:52,030 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 01:52:52,032 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 01:52:52,168 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 01:52:52,213 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 01:52:52,213 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 01:52:52,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:52:52 BoogieIcfgContainer [2021-11-23 01:52:52,216 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 01:52:52,217 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 01:52:52,218 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 01:52:52,221 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 01:52:52,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:52:51" (1/3) ... [2021-11-23 01:52:52,222 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bf791ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:52:52, skipping insertion in model container [2021-11-23 01:52:52,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:51" (2/3) ... [2021-11-23 01:52:52,222 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bf791ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:52:52, skipping insertion in model container [2021-11-23 01:52:52,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:52:52" (3/3) ... [2021-11-23 01:52:52,224 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum60.i [2021-11-23 01:52:52,229 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 01:52:52,229 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 01:52:52,280 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 01:52:52,295 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 01:52:52,295 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 01:52:52,343 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 01:52:52,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 01:52:52,348 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:52:52,349 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:52:52,350 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:52:52,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:52:52,355 INFO L85 PathProgramCache]: Analyzing trace with hash -362891911, now seen corresponding path program 1 times [2021-11-23 01:52:52,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:52:52,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53100514] [2021-11-23 01:52:52,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:52:52,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:52:52,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:52:52,532 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:52:52,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53100514] [2021-11-23 01:52:52,534 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2021-11-23 01:52:52,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227863737] [2021-11-23 01:52:52,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:52:52,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:52:52,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:52:52,539 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:52:52,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 01:52:52,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:52:52,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 01:52:52,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:52:52,832 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 01:52:52,833 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 01:52:52,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227863737] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:52:52,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:52:52,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 01:52:52,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655819101] [2021-11-23 01:52:52,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:52:52,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:52:52,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:52:52,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:52:52,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:52:52,890 INFO L87 Difference]: Start difference. First operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 01:52:52,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:52:52,955 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2021-11-23 01:52:52,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:52:52,958 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 20 [2021-11-23 01:52:52,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:52:52,974 INFO L225 Difference]: With dead ends: 33 [2021-11-23 01:52:52,975 INFO L226 Difference]: Without dead ends: 16 [2021-11-23 01:52:52,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:52:52,983 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 01:52:52,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 01:52:53,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-23 01:52:53,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-23 01:52:53,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 01:52:53,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2021-11-23 01:52:53,027 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 20 [2021-11-23 01:52:53,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:52:53,028 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2021-11-23 01:52:53,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 01:52:53,028 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2021-11-23 01:52:53,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 01:52:53,030 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:52:53,030 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:52:53,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 01:52:53,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-23 01:52:53,231 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:52:53,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:52:53,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1234920756, now seen corresponding path program 1 times [2021-11-23 01:52:53,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:52:53,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591552148] [2021-11-23 01:52:53,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:52:53,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:52:53,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:52:53,264 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:52:53,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591552148] [2021-11-23 01:52:53,265 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2021-11-23 01:52:53,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202846465] [2021-11-23 01:52:53,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:52:53,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:52:53,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:52:53,267 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:52:53,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 01:52:53,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:52:53,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 01:52:53,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:52:53,409 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 01:52:53,409 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 01:52:53,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202846465] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:52:53,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:52:53,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 01:52:53,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516006509] [2021-11-23 01:52:53,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:52:53,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:52:53,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:52:53,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:52:53,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:52:53,417 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 01:52:53,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:52:53,447 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2021-11-23 01:52:53,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:52:53,448 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2021-11-23 01:52:53,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:52:53,449 INFO L225 Difference]: With dead ends: 29 [2021-11-23 01:52:53,449 INFO L226 Difference]: Without dead ends: 17 [2021-11-23 01:52:53,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:52:53,451 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 01:52:53,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 01:52:53,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-23 01:52:53,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-23 01:52:53,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 01:52:53,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-11-23 01:52:53,458 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 21 [2021-11-23 01:52:53,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:52:53,458 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-11-23 01:52:53,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 01:52:53,458 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2021-11-23 01:52:53,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 01:52:53,459 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:52:53,460 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:52:53,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 01:52:53,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:52:53,681 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:52:53,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:52:53,681 INFO L85 PathProgramCache]: Analyzing trace with hash -877476800, now seen corresponding path program 1 times [2021-11-23 01:52:53,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:52:53,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55081482] [2021-11-23 01:52:53,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:52:53,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:52:53,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:52:53,716 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:52:53,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55081482] [2021-11-23 01:52:53,716 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2021-11-23 01:52:53,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810313971] [2021-11-23 01:52:53,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:52:53,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:52:53,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:52:53,718 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:52:53,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 01:52:53,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:52:53,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 01:52:53,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:52:53,896 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 01:52:53,896 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 01:52:53,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810313971] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:52:53,896 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:52:53,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 01:52:53,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150148131] [2021-11-23 01:52:53,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:52:53,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:52:53,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:52:53,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:52:53,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:52:53,899 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 01:52:53,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:52:53,928 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2021-11-23 01:52:53,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:52:53,931 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-11-23 01:52:53,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:52:53,932 INFO L225 Difference]: With dead ends: 27 [2021-11-23 01:52:53,932 INFO L226 Difference]: Without dead ends: 18 [2021-11-23 01:52:53,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:52:53,934 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 01:52:53,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 01:52:53,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-23 01:52:53,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-23 01:52:53,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 01:52:53,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-11-23 01:52:53,940 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 24 [2021-11-23 01:52:53,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:52:53,941 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-11-23 01:52:53,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 01:52:53,942 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-11-23 01:52:53,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 01:52:53,943 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:52:53,943 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:52:53,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 01:52:54,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:52:54,144 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:52:54,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:52:54,144 INFO L85 PathProgramCache]: Analyzing trace with hash 140313158, now seen corresponding path program 1 times [2021-11-23 01:52:54,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:52:54,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158552326] [2021-11-23 01:52:54,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:52:54,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:52:54,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:52:54,192 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:52:54,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158552326] [2021-11-23 01:52:54,192 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2021-11-23 01:52:54,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193824578] [2021-11-23 01:52:54,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:52:54,193 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:52:54,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:52:54,196 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:52:54,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 01:52:54,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:52:54,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 01:52:54,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:52:54,365 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-23 01:52:54,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:52:54,469 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-23 01:52:54,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193824578] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:52:54,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1175881091] [2021-11-23 01:52:54,496 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 01:52:54,496 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:52:54,501 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:52:54,507 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:52:54,507 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:52:54,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:54,608 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 01:52:54,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2021-11-23 01:52:54,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:54,652 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 01:52:54,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-23 01:52:54,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:54,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 01:52:54,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:54,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:54,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:54,868 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 01:52:54,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 232 treesize of output 220 [2021-11-23 01:52:54,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 01:52:55,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:55,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-23 01:52:55,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:55,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2021-11-23 01:52:55,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:55,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:55,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:55,774 INFO L354 Elim1Store]: treesize reduction 65, result has 27.0 percent of original size [2021-11-23 01:52:55,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 80 [2021-11-23 01:52:55,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:55,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-23 01:52:55,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:52:56,307 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2021-11-23 01:52:56,473 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:52:58,679 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '576#(and (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.offset|) (<= 0 |ULTIMATE.start_init_nondet_~x#1.offset|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= |ULTIMATE.start_init_nondet_#in~x#1.offset| 0) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= |ULTIMATE.start_init_nondet_~x#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_~x#1.base|) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 59 |ULTIMATE.start_main_~i~2#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.base|) (<= 60 |ULTIMATE.start_init_nondet_~i~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 236 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |#StackHeapBarrier|) (exists ((v_rangesum_~cnt~0_BEFORE_RETURN_5 Int)) (and (<= 0 v_rangesum_~cnt~0_BEFORE_RETURN_5) (or (and (= v_rangesum_~cnt~0_BEFORE_RETURN_5 0) (= |ULTIMATE.start_main_~ret5~0#1| 0)) (and (not (= v_rangesum_~cnt~0_BEFORE_RETURN_5 0)) (exists ((v_rangesum_~ret~0_BEFORE_RETURN_5 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_5 v_rangesum_~cnt~0_BEFORE_RETURN_5) 0)) (< v_rangesum_~ret~0_BEFORE_RETURN_5 0)) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_5 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_5 v_rangesum_~cnt~0_BEFORE_RETURN_5)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_5 v_rangesum_~cnt~0_BEFORE_RETURN_5) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_5 v_rangesum_~cnt~0_BEFORE_RETURN_5)) 4294967296) 2147483647) (mod (ite (and (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_5 v_rangesum_~cnt~0_BEFORE_RETURN_5) 0)) (< v_rangesum_~ret~0_BEFORE_RETURN_5 0)) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_5 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_5 v_rangesum_~cnt~0_BEFORE_RETURN_5)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_5 v_rangesum_~cnt~0_BEFORE_RETURN_5) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_5 v_rangesum_~cnt~0_BEFORE_RETURN_5)) 4294967296) (+ (- 4294967296) (mod (ite (and (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_5 v_rangesum_~cnt~0_BEFORE_RETURN_5) 0)) (< v_rangesum_~ret~0_BEFORE_RETURN_5 0)) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_5 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_5 v_rangesum_~cnt~0_BEFORE_RETURN_5)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_5 v_rangesum_~cnt~0_BEFORE_RETURN_5) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_5 v_rangesum_~cnt~0_BEFORE_RETURN_5)) 4294967296))))))))) (= |#NULL.base| 0))' at error location [2021-11-23 01:52:58,679 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 01:52:58,679 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 01:52:58,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 6 [2021-11-23 01:52:58,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152889000] [2021-11-23 01:52:58,680 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 01:52:58,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 01:52:58,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:52:58,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 01:52:58,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-11-23 01:52:58,682 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-23 01:52:58,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:52:58,721 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2021-11-23 01:52:58,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 01:52:58,722 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 25 [2021-11-23 01:52:58,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:52:58,723 INFO L225 Difference]: With dead ends: 36 [2021-11-23 01:52:58,723 INFO L226 Difference]: Without dead ends: 21 [2021-11-23 01:52:58,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-11-23 01:52:58,725 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 01:52:58,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 01:52:58,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-23 01:52:58,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-23 01:52:58,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 01:52:58,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-11-23 01:52:58,731 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2021-11-23 01:52:58,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:52:58,732 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-11-23 01:52:58,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-23 01:52:58,732 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-11-23 01:52:58,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 01:52:58,733 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:52:58,733 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:52:58,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 01:52:58,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:52:58,962 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:52:58,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:52:58,962 INFO L85 PathProgramCache]: Analyzing trace with hash 139189043, now seen corresponding path program 2 times [2021-11-23 01:52:58,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:52:58,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247952822] [2021-11-23 01:52:58,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:52:58,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:52:58,980 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 01:52:58,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1606832560] [2021-11-23 01:52:58,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 01:52:58,981 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:52:58,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:52:58,982 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:52:58,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 01:52:59,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 01:52:59,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 01:52:59,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 01:52:59,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:52:59,097 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 01:52:59,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:52:59,155 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 01:52:59,156 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:52:59,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247952822] [2021-11-23 01:52:59,156 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 01:52:59,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606832560] [2021-11-23 01:52:59,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606832560] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:52:59,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1983965736] [2021-11-23 01:52:59,159 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 01:52:59,159 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:52:59,160 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:52:59,160 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:52:59,160 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:52:59,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:59,189 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 01:52:59,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2021-11-23 01:52:59,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:59,212 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 01:52:59,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-23 01:52:59,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:59,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 01:52:59,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:59,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:52:59,333 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 01:52:59,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 222 treesize of output 221 [2021-11-23 01:52:59,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 01:52:59,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:59,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-23 01:52:59,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:59,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:52:59,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:52:59,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2021-11-23 01:53:00,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:00,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:00,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:00,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:00,043 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-23 01:53:00,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2021-11-23 01:53:00,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:00,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-23 01:53:00,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:53:00,398 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2021-11-23 01:53:00,604 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:53:08,665 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '848#(and (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.offset|) (<= 0 |ULTIMATE.start_init_nondet_~x#1.offset|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= |ULTIMATE.start_init_nondet_#in~x#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= |ULTIMATE.start_init_nondet_~x#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_init_nondet_~x#1.base|) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 59 |ULTIMATE.start_main_~i~2#1|) (exists ((v_rangesum_~cnt~0_BEFORE_RETURN_11 Int)) (and (<= 0 v_rangesum_~cnt~0_BEFORE_RETURN_11) (or (and (= v_rangesum_~cnt~0_BEFORE_RETURN_11 0) (= |ULTIMATE.start_main_~ret5~0#1| 0)) (and (exists ((v_rangesum_~ret~0_BEFORE_RETURN_11 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_11 v_rangesum_~cnt~0_BEFORE_RETURN_11) 0)) (< v_rangesum_~ret~0_BEFORE_RETURN_11 0)) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_11 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_11 v_rangesum_~cnt~0_BEFORE_RETURN_11)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_11 v_rangesum_~cnt~0_BEFORE_RETURN_11) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_11 v_rangesum_~cnt~0_BEFORE_RETURN_11)) 4294967296) 2147483647) (mod (ite (and (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_11 v_rangesum_~cnt~0_BEFORE_RETURN_11) 0)) (< v_rangesum_~ret~0_BEFORE_RETURN_11 0)) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_11 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_11 v_rangesum_~cnt~0_BEFORE_RETURN_11)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_11 v_rangesum_~cnt~0_BEFORE_RETURN_11) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_11 v_rangesum_~cnt~0_BEFORE_RETURN_11)) 4294967296) (+ (mod (ite (and (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_11 v_rangesum_~cnt~0_BEFORE_RETURN_11) 0)) (< v_rangesum_~ret~0_BEFORE_RETURN_11 0)) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_11 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_11 v_rangesum_~cnt~0_BEFORE_RETURN_11)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_11 v_rangesum_~cnt~0_BEFORE_RETURN_11) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_11 v_rangesum_~cnt~0_BEFORE_RETURN_11)) 4294967296) (- 4294967296))))) (not (= v_rangesum_~cnt~0_BEFORE_RETURN_11 0)))))) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.base|) (<= 60 |ULTIMATE.start_init_nondet_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 236 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 01:53:08,665 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 01:53:08,665 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 01:53:08,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-23 01:53:08,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608423973] [2021-11-23 01:53:08,666 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 01:53:08,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 01:53:08,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:53:08,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 01:53:08,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-11-23 01:53:08,668 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 01:53:08,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:53:08,733 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2021-11-23 01:53:08,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 01:53:08,734 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2021-11-23 01:53:08,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:53:08,735 INFO L225 Difference]: With dead ends: 38 [2021-11-23 01:53:08,735 INFO L226 Difference]: Without dead ends: 24 [2021-11-23 01:53:08,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-11-23 01:53:08,737 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:53:08,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:53:08,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-23 01:53:08,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-23 01:53:08,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 01:53:08,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-11-23 01:53:08,742 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 28 [2021-11-23 01:53:08,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:53:08,743 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-11-23 01:53:08,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 01:53:08,743 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-11-23 01:53:08,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-23 01:53:08,744 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:53:08,745 INFO L514 BasicCegarLoop]: trace histogram [12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:53:08,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 01:53:08,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:53:08,962 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:53:08,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:53:08,962 INFO L85 PathProgramCache]: Analyzing trace with hash 378555129, now seen corresponding path program 3 times [2021-11-23 01:53:08,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:53:08,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519036511] [2021-11-23 01:53:08,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:53:08,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:53:08,975 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 01:53:08,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [109403253] [2021-11-23 01:53:08,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 01:53:08,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:53:08,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:53:08,977 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:53:08,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 01:53:09,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 01:53:09,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 01:53:09,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 01:53:09,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:53:09,132 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-23 01:53:09,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:53:09,240 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-23 01:53:09,241 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:53:09,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519036511] [2021-11-23 01:53:09,241 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 01:53:09,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109403253] [2021-11-23 01:53:09,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109403253] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:53:09,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1458538704] [2021-11-23 01:53:09,247 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 01:53:09,248 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:53:09,248 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:53:09,248 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:53:09,248 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:53:09,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:09,285 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 01:53:09,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-23 01:53:09,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:09,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-23 01:53:09,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:09,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 01:53:09,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:09,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:09,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:09,399 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 01:53:09,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 232 treesize of output 220 [2021-11-23 01:53:09,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 01:53:09,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:09,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-23 01:53:09,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:09,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:09,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:53:09,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2021-11-23 01:53:10,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:10,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:10,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:10,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:10,040 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-23 01:53:10,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2021-11-23 01:53:10,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:10,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-23 01:53:10,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:53:10,366 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2021-11-23 01:53:10,544 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:53:18,265 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1190#(and (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.offset|) (<= 0 |ULTIMATE.start_init_nondet_~x#1.offset|) (exists ((v_rangesum_~cnt~0_BEFORE_RETURN_18 Int)) (and (or (and (= v_rangesum_~cnt~0_BEFORE_RETURN_18 0) (= |ULTIMATE.start_main_~ret5~0#1| 0)) (and (not (= v_rangesum_~cnt~0_BEFORE_RETURN_18 0)) (exists ((v_rangesum_~ret~0_BEFORE_RETURN_18 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_18 v_rangesum_~cnt~0_BEFORE_RETURN_18) 0)) (< v_rangesum_~ret~0_BEFORE_RETURN_18 0)) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_18 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_18 v_rangesum_~cnt~0_BEFORE_RETURN_18)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_18 v_rangesum_~cnt~0_BEFORE_RETURN_18) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_18 v_rangesum_~cnt~0_BEFORE_RETURN_18)) 4294967296) 2147483647) (mod (ite (and (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_18 v_rangesum_~cnt~0_BEFORE_RETURN_18) 0)) (< v_rangesum_~ret~0_BEFORE_RETURN_18 0)) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_18 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_18 v_rangesum_~cnt~0_BEFORE_RETURN_18)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_18 v_rangesum_~cnt~0_BEFORE_RETURN_18) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_18 v_rangesum_~cnt~0_BEFORE_RETURN_18)) 4294967296) (+ (mod (ite (and (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_18 v_rangesum_~cnt~0_BEFORE_RETURN_18) 0)) (< v_rangesum_~ret~0_BEFORE_RETURN_18 0)) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_18 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_18 v_rangesum_~cnt~0_BEFORE_RETURN_18)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_18 v_rangesum_~cnt~0_BEFORE_RETURN_18) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_18 v_rangesum_~cnt~0_BEFORE_RETURN_18)) 4294967296) (- 4294967296))))))) (<= 0 v_rangesum_~cnt~0_BEFORE_RETURN_18))) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= |ULTIMATE.start_init_nondet_#in~x#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= |ULTIMATE.start_init_nondet_~x#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_init_nondet_~x#1.base|) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 59 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.base|) (<= 60 |ULTIMATE.start_init_nondet_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 236 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 01:53:18,265 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 01:53:18,266 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 01:53:18,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-11-23 01:53:18,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315972663] [2021-11-23 01:53:18,266 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 01:53:18,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 01:53:18,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:53:18,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 01:53:18,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2021-11-23 01:53:18,268 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-23 01:53:18,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:53:18,332 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2021-11-23 01:53:18,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 01:53:18,333 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 37 [2021-11-23 01:53:18,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:53:18,334 INFO L225 Difference]: With dead ends: 48 [2021-11-23 01:53:18,334 INFO L226 Difference]: Without dead ends: 30 [2021-11-23 01:53:18,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2021-11-23 01:53:18,335 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:53:18,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:53:18,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-23 01:53:18,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-11-23 01:53:18,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 01:53:18,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-11-23 01:53:18,341 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 37 [2021-11-23 01:53:18,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:53:18,342 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-11-23 01:53:18,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-23 01:53:18,342 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-11-23 01:53:18,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-23 01:53:18,343 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:53:18,344 INFO L514 BasicCegarLoop]: trace histogram [12, 10, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:53:18,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 01:53:18,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-23 01:53:18,558 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:53:18,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:53:18,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1272494041, now seen corresponding path program 4 times [2021-11-23 01:53:18,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:53:18,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021631534] [2021-11-23 01:53:18,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:53:18,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:53:18,599 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 01:53:18,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1475117178] [2021-11-23 01:53:18,606 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 01:53:18,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:53:18,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:53:18,608 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:53:18,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 01:53:18,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:53:18,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 01:53:18,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:53:18,854 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-23 01:53:18,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:53:19,090 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-23 01:53:19,090 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:53:19,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021631534] [2021-11-23 01:53:19,091 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 01:53:19,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475117178] [2021-11-23 01:53:19,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475117178] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:53:19,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1591966941] [2021-11-23 01:53:19,094 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 01:53:19,094 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:53:19,095 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:53:19,095 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:53:19,095 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:53:19,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:19,138 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 01:53:19,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-23 01:53:19,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:19,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-23 01:53:19,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:19,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 01:53:19,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:19,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:53:19,252 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 01:53:19,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 222 treesize of output 221 [2021-11-23 01:53:19,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 01:53:19,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:19,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-23 01:53:19,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:19,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:19,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:53:19,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2021-11-23 01:53:19,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:19,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:19,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:19,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:19,820 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-23 01:53:19,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2021-11-23 01:53:19,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:19,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-23 01:53:19,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:53:20,187 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2021-11-23 01:53:20,332 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:53:28,147 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1612#(and (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.offset|) (<= 0 |ULTIMATE.start_init_nondet_~x#1.offset|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= |ULTIMATE.start_init_nondet_#in~x#1.offset| 0) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= |ULTIMATE.start_init_nondet_~x#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_~x#1.base|) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 59 |ULTIMATE.start_main_~i~2#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.base|) (exists ((v_rangesum_~cnt~0_BEFORE_RETURN_24 Int)) (and (or (and (not (= v_rangesum_~cnt~0_BEFORE_RETURN_24 0)) (exists ((v_rangesum_~ret~0_BEFORE_RETURN_24 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_24 0) (not (= 0 (mod v_rangesum_~ret~0_BEFORE_RETURN_24 v_rangesum_~cnt~0_BEFORE_RETURN_24)))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_24 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_24 v_rangesum_~cnt~0_BEFORE_RETURN_24)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_24 v_rangesum_~cnt~0_BEFORE_RETURN_24) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_24 v_rangesum_~cnt~0_BEFORE_RETURN_24)) 4294967296) 2147483647) (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_24 0) (not (= 0 (mod v_rangesum_~ret~0_BEFORE_RETURN_24 v_rangesum_~cnt~0_BEFORE_RETURN_24)))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_24 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_24 v_rangesum_~cnt~0_BEFORE_RETURN_24)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_24 v_rangesum_~cnt~0_BEFORE_RETURN_24) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_24 v_rangesum_~cnt~0_BEFORE_RETURN_24)) 4294967296) (+ (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_24 0) (not (= 0 (mod v_rangesum_~ret~0_BEFORE_RETURN_24 v_rangesum_~cnt~0_BEFORE_RETURN_24)))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_24 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_24 v_rangesum_~cnt~0_BEFORE_RETURN_24)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_24 v_rangesum_~cnt~0_BEFORE_RETURN_24) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_24 v_rangesum_~cnt~0_BEFORE_RETURN_24)) 4294967296) (- 4294967296)))))) (and (= v_rangesum_~cnt~0_BEFORE_RETURN_24 0) (= |ULTIMATE.start_main_~ret5~0#1| 0))) (<= 0 v_rangesum_~cnt~0_BEFORE_RETURN_24))) (<= 60 |ULTIMATE.start_init_nondet_~i~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 236 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 01:53:28,148 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 01:53:28,148 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 01:53:28,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2021-11-23 01:53:28,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630927024] [2021-11-23 01:53:28,149 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 01:53:28,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-23 01:53:28,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:53:28,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-23 01:53:28,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=996, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 01:53:28,151 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-23 01:53:28,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:53:28,215 INFO L93 Difference]: Finished difference Result 60 states and 79 transitions. [2021-11-23 01:53:28,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 01:53:28,216 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 43 [2021-11-23 01:53:28,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:53:28,216 INFO L225 Difference]: With dead ends: 60 [2021-11-23 01:53:28,216 INFO L226 Difference]: Without dead ends: 42 [2021-11-23 01:53:28,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=336, Invalid=996, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 01:53:28,218 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:53:28,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 60 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:53:28,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-23 01:53:28,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-11-23 01:53:28,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 01:53:28,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-11-23 01:53:28,223 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 43 [2021-11-23 01:53:28,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:53:28,224 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-11-23 01:53:28,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-23 01:53:28,224 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-11-23 01:53:28,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-23 01:53:28,226 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:53:28,226 INFO L514 BasicCegarLoop]: trace histogram [22, 12, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:53:28,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 01:53:28,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-23 01:53:28,430 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:53:28,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:53:28,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1480595865, now seen corresponding path program 5 times [2021-11-23 01:53:28,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:53:28,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642058812] [2021-11-23 01:53:28,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:53:28,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:53:28,489 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 01:53:28,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [529487530] [2021-11-23 01:53:28,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 01:53:28,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:53:28,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:53:28,492 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:53:28,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 01:53:28,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 01:53:28,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 01:53:28,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 01:53:28,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:53:28,647 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 54 proven. 1 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2021-11-23 01:53:28,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:53:28,741 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-23 01:53:28,741 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:53:28,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642058812] [2021-11-23 01:53:28,741 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 01:53:28,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529487530] [2021-11-23 01:53:28,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529487530] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:53:28,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1892763534] [2021-11-23 01:53:28,744 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 01:53:28,744 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:53:28,744 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:53:28,744 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:53:28,744 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:53:28,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:28,777 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 01:53:28,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2021-11-23 01:53:28,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:28,809 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 01:53:28,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-23 01:53:28,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:28,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 01:53:28,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:28,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:28,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:28,896 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 01:53:28,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 232 treesize of output 220 [2021-11-23 01:53:28,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 01:53:29,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:29,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-23 01:53:29,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:29,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:29,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:53:29,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2021-11-23 01:53:29,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:29,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:29,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:29,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:29,436 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-23 01:53:29,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2021-11-23 01:53:29,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:29,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-23 01:53:29,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:53:29,772 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2021-11-23 01:53:29,894 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:53:35,962 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2136#(and (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.offset|) (<= 0 |ULTIMATE.start_init_nondet_~x#1.offset|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= |ULTIMATE.start_init_nondet_#in~x#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= |ULTIMATE.start_init_nondet_~x#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_init_nondet_~x#1.base|) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 59 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.base|) (<= 60 |ULTIMATE.start_init_nondet_~i~0#1|) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 236 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 01:53:35,963 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 01:53:35,963 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 01:53:35,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-23 01:53:35,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310766769] [2021-11-23 01:53:35,963 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 01:53:35,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 01:53:35,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:53:35,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 01:53:35,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-11-23 01:53:35,965 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 01:53:36,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:53:36,004 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2021-11-23 01:53:36,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 01:53:36,004 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2021-11-23 01:53:36,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:53:36,006 INFO L225 Difference]: With dead ends: 57 [2021-11-23 01:53:36,006 INFO L226 Difference]: Without dead ends: 45 [2021-11-23 01:53:36,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-11-23 01:53:36,007 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 01:53:36,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 01:53:36,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-23 01:53:36,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-11-23 01:53:36,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.075) internal successors, (43), 40 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 01:53:36,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-11-23 01:53:36,015 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 55 [2021-11-23 01:53:36,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:53:36,015 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-11-23 01:53:36,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 01:53:36,016 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-11-23 01:53:36,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-23 01:53:36,017 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:53:36,017 INFO L514 BasicCegarLoop]: trace histogram [22, 12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:53:36,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 01:53:36,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:53:36,242 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:53:36,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:53:36,242 INFO L85 PathProgramCache]: Analyzing trace with hash -496280295, now seen corresponding path program 6 times [2021-11-23 01:53:36,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:53:36,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751605607] [2021-11-23 01:53:36,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:53:36,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:53:36,286 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 01:53:36,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1815276849] [2021-11-23 01:53:36,287 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 01:53:36,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:53:36,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:53:36,291 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:53:36,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 01:53:36,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 01:53:36,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 01:53:36,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 01:53:36,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:53:36,737 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-23 01:53:36,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:53:37,425 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-23 01:53:37,425 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:53:37,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751605607] [2021-11-23 01:53:37,425 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 01:53:37,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815276849] [2021-11-23 01:53:37,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815276849] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:53:37,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [923117119] [2021-11-23 01:53:37,427 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 01:53:37,427 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:53:37,427 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:53:37,427 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:53:37,427 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:53:37,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:37,466 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 01:53:37,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-23 01:53:37,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:37,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-23 01:53:37,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:37,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 01:53:37,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:37,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:53:37,576 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 01:53:37,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 222 treesize of output 221 [2021-11-23 01:53:37,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 01:53:37,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:37,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-23 01:53:38,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:38,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2021-11-23 01:53:38,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:38,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:38,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:38,144 INFO L354 Elim1Store]: treesize reduction 60, result has 32.6 percent of original size [2021-11-23 01:53:38,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 85 [2021-11-23 01:53:38,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:38,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-23 01:53:38,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:53:38,484 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2021-11-23 01:53:38,650 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:53:48,806 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2722#(and (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.offset|) (<= 0 |ULTIMATE.start_init_nondet_~x#1.offset|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= |ULTIMATE.start_init_nondet_#in~x#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= |ULTIMATE.start_init_nondet_~x#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_init_nondet_~x#1.base|) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 59 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.base|) (<= 60 |ULTIMATE.start_init_nondet_~i~0#1|) (exists ((v_rangesum_~cnt~0_BEFORE_RETURN_36 Int)) (and (or (and (not (= v_rangesum_~cnt~0_BEFORE_RETURN_36 0)) (exists ((v_rangesum_~ret~0_BEFORE_RETURN_36 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_36 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_36 v_rangesum_~cnt~0_BEFORE_RETURN_36) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_36 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_36 v_rangesum_~cnt~0_BEFORE_RETURN_36)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_36 v_rangesum_~cnt~0_BEFORE_RETURN_36) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_36 v_rangesum_~cnt~0_BEFORE_RETURN_36)) 4294967296) 2147483647) (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_36 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_36 v_rangesum_~cnt~0_BEFORE_RETURN_36) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_36 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_36 v_rangesum_~cnt~0_BEFORE_RETURN_36)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_36 v_rangesum_~cnt~0_BEFORE_RETURN_36) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_36 v_rangesum_~cnt~0_BEFORE_RETURN_36)) 4294967296) (+ (- 4294967296) (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_36 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_36 v_rangesum_~cnt~0_BEFORE_RETURN_36) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_36 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_36 v_rangesum_~cnt~0_BEFORE_RETURN_36)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_36 v_rangesum_~cnt~0_BEFORE_RETURN_36) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_36 v_rangesum_~cnt~0_BEFORE_RETURN_36)) 4294967296)))))) (and (= |ULTIMATE.start_main_~ret5~0#1| 0) (= v_rangesum_~cnt~0_BEFORE_RETURN_36 0))) (<= 0 v_rangesum_~cnt~0_BEFORE_RETURN_36))) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 236 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 01:53:48,806 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 01:53:48,806 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 01:53:48,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 48 [2021-11-23 01:53:48,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201666224] [2021-11-23 01:53:48,807 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 01:53:48,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-23 01:53:48,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:53:48,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-23 01:53:48,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1188, Invalid=2472, Unknown=0, NotChecked=0, Total=3660 [2021-11-23 01:53:48,811 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 48 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 48 states have internal predecessors, (61), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-23 01:53:48,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:53:48,921 INFO L93 Difference]: Finished difference Result 90 states and 121 transitions. [2021-11-23 01:53:48,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-23 01:53:48,922 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 48 states have internal predecessors, (61), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 58 [2021-11-23 01:53:48,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:53:48,926 INFO L225 Difference]: With dead ends: 90 [2021-11-23 01:53:48,926 INFO L226 Difference]: Without dead ends: 69 [2021-11-23 01:53:48,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=1188, Invalid=2472, Unknown=0, NotChecked=0, Total=3660 [2021-11-23 01:53:48,931 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:53:48,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 84 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:53:48,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-23 01:53:48,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-11-23 01:53:48,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.046875) internal successors, (67), 64 states have internal predecessors, (67), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 01:53:48,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2021-11-23 01:53:48,953 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 58 [2021-11-23 01:53:48,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:53:48,953 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2021-11-23 01:53:48,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 48 states have internal predecessors, (61), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-23 01:53:48,953 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2021-11-23 01:53:48,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-23 01:53:48,961 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:53:48,961 INFO L514 BasicCegarLoop]: trace histogram [46, 12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:53:48,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 01:53:49,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:53:49,162 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:53:49,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:53:49,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1231407513, now seen corresponding path program 7 times [2021-11-23 01:53:49,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:53:49,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633535986] [2021-11-23 01:53:49,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:53:49,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:53:49,202 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 01:53:49,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2055728103] [2021-11-23 01:53:49,203 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 01:53:49,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:53:49,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:53:49,204 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:53:49,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 01:53:49,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:53:49,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-23 01:53:49,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:53:50,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1202 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-23 01:53:50,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:53:51,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1202 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-23 01:53:51,117 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:53:51,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633535986] [2021-11-23 01:53:51,118 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 01:53:51,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055728103] [2021-11-23 01:53:51,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055728103] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:53:51,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [846543827] [2021-11-23 01:53:51,120 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 01:53:51,120 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:53:51,120 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:53:51,120 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:53:51,121 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:53:51,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:51,146 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 01:53:51,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-23 01:53:51,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:51,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-23 01:53:51,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:51,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 01:53:51,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:51,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:53:51,242 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 01:53:51,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 222 treesize of output 221 [2021-11-23 01:53:51,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 01:53:51,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:51,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-23 01:53:51,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:51,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:51,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:53:51,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2021-11-23 01:53:51,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:51,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:51,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:51,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:51,880 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-23 01:53:51,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2021-11-23 01:53:51,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:51,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-23 01:53:51,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:53:52,235 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2021-11-23 01:53:52,393 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:53:59,950 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3578#(and (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.offset|) (<= 0 |ULTIMATE.start_init_nondet_~x#1.offset|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= |ULTIMATE.start_init_nondet_#in~x#1.offset| 0) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= |ULTIMATE.start_init_nondet_~x#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_~x#1.base|) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 59 |ULTIMATE.start_main_~i~2#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.base|) (<= 60 |ULTIMATE.start_init_nondet_~i~0#1|) (exists ((v_rangesum_~cnt~0_BEFORE_RETURN_41 Int)) (and (or (and (= v_rangesum_~cnt~0_BEFORE_RETURN_41 0) (= |ULTIMATE.start_main_~ret5~0#1| 0)) (and (not (= v_rangesum_~cnt~0_BEFORE_RETURN_41 0)) (exists ((v_rangesum_~ret~0_BEFORE_RETURN_41 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_41 v_rangesum_~cnt~0_BEFORE_RETURN_41) 0)) (< v_rangesum_~ret~0_BEFORE_RETURN_41 0)) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_41 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_41 v_rangesum_~cnt~0_BEFORE_RETURN_41)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_41 v_rangesum_~cnt~0_BEFORE_RETURN_41) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_41 v_rangesum_~cnt~0_BEFORE_RETURN_41)) 4294967296) 2147483647) (mod (ite (and (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_41 v_rangesum_~cnt~0_BEFORE_RETURN_41) 0)) (< v_rangesum_~ret~0_BEFORE_RETURN_41 0)) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_41 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_41 v_rangesum_~cnt~0_BEFORE_RETURN_41)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_41 v_rangesum_~cnt~0_BEFORE_RETURN_41) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_41 v_rangesum_~cnt~0_BEFORE_RETURN_41)) 4294967296) (+ (- 4294967296) (mod (ite (and (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_41 v_rangesum_~cnt~0_BEFORE_RETURN_41) 0)) (< v_rangesum_~ret~0_BEFORE_RETURN_41 0)) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_41 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_41 v_rangesum_~cnt~0_BEFORE_RETURN_41)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_41 v_rangesum_~cnt~0_BEFORE_RETURN_41) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_41 v_rangesum_~cnt~0_BEFORE_RETURN_41)) 4294967296))))))) (<= 0 v_rangesum_~cnt~0_BEFORE_RETURN_41))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 236 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 01:53:59,950 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 01:53:59,950 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 01:53:59,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 49] total 62 [2021-11-23 01:53:59,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179408127] [2021-11-23 01:53:59,951 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 01:53:59,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-23 01:53:59,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:53:59,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-23 01:53:59,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1951, Invalid=3599, Unknown=0, NotChecked=0, Total=5550 [2021-11-23 01:53:59,955 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand has 62 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 62 states have internal predecessors, (76), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-23 01:54:00,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:54:00,073 INFO L93 Difference]: Finished difference Result 104 states and 125 transitions. [2021-11-23 01:54:00,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-23 01:54:00,074 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 62 states have internal predecessors, (76), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 82 [2021-11-23 01:54:00,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:54:00,075 INFO L225 Difference]: With dead ends: 104 [2021-11-23 01:54:00,075 INFO L226 Difference]: Without dead ends: 83 [2021-11-23 01:54:00,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 170 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=1951, Invalid=3599, Unknown=0, NotChecked=0, Total=5550 [2021-11-23 01:54:00,078 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:54:00,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 84 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:54:00,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-23 01:54:00,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-11-23 01:54:00,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 78 states have internal predecessors, (81), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 01:54:00,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2021-11-23 01:54:00,099 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 82 [2021-11-23 01:54:00,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:54:00,100 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2021-11-23 01:54:00,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 62 states have internal predecessors, (76), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-23 01:54:00,101 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2021-11-23 01:54:00,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-23 01:54:00,104 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:54:00,104 INFO L514 BasicCegarLoop]: trace histogram [60, 12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:54:00,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 01:54:00,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 01:54:00,326 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:54:00,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:54:00,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1162355257, now seen corresponding path program 8 times [2021-11-23 01:54:00,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:54:00,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35849391] [2021-11-23 01:54:00,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:54:00,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:54:00,401 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 01:54:00,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [886980917] [2021-11-23 01:54:00,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 01:54:00,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:54:00,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:54:00,403 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:54:00,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 01:54:00,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 01:54:00,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 01:54:00,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 01:54:00,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:54:00,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1951 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 1889 trivial. 0 not checked. [2021-11-23 01:54:00,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:54:00,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1951 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 1889 trivial. 0 not checked. [2021-11-23 01:54:00,785 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:54:00,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35849391] [2021-11-23 01:54:00,785 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 01:54:00,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886980917] [2021-11-23 01:54:00,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886980917] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:54:00,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [849021042] [2021-11-23 01:54:00,789 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 01:54:00,789 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:54:00,790 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:54:00,790 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:54:00,790 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:54:00,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:00,817 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 01:54:00,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-23 01:54:00,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:00,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-23 01:54:00,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:00,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 01:54:00,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:00,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:54:00,914 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 01:54:00,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 222 treesize of output 221 [2021-11-23 01:54:01,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 01:54:01,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:01,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-23 01:54:01,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:01,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:01,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:54:01,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2021-11-23 01:54:01,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:01,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:01,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:01,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:01,525 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-23 01:54:01,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2021-11-23 01:54:01,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:01,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-23 01:54:01,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:54:01,808 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2021-11-23 01:54:01,941 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:54:05,976 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4524#(and (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.offset|) (<= 0 |ULTIMATE.start_init_nondet_~x#1.offset|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= |ULTIMATE.start_init_nondet_#in~x#1.offset| 0) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= |ULTIMATE.start_init_nondet_~x#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_~x#1.base|) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 59 |ULTIMATE.start_main_~i~2#1|) (exists ((v_rangesum_~cnt~0_BEFORE_RETURN_48 Int)) (and (<= 0 v_rangesum_~cnt~0_BEFORE_RETURN_48) (or (and (= v_rangesum_~cnt~0_BEFORE_RETURN_48 0) (= |ULTIMATE.start_main_~ret5~0#1| 0)) (and (not (= v_rangesum_~cnt~0_BEFORE_RETURN_48 0)) (exists ((v_rangesum_~ret~0_BEFORE_RETURN_48 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_48 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_48 v_rangesum_~cnt~0_BEFORE_RETURN_48) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_48 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_48 v_rangesum_~cnt~0_BEFORE_RETURN_48)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_48 v_rangesum_~cnt~0_BEFORE_RETURN_48) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_48 v_rangesum_~cnt~0_BEFORE_RETURN_48)) 4294967296) 2147483647) (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_48 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_48 v_rangesum_~cnt~0_BEFORE_RETURN_48) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_48 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_48 v_rangesum_~cnt~0_BEFORE_RETURN_48)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_48 v_rangesum_~cnt~0_BEFORE_RETURN_48) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_48 v_rangesum_~cnt~0_BEFORE_RETURN_48)) 4294967296) (+ (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_48 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_48 v_rangesum_~cnt~0_BEFORE_RETURN_48) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_48 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_48 v_rangesum_~cnt~0_BEFORE_RETURN_48)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_48 v_rangesum_~cnt~0_BEFORE_RETURN_48) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_48 v_rangesum_~cnt~0_BEFORE_RETURN_48)) 4294967296) (- 4294967296))))))))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.base|) (<= 60 |ULTIMATE.start_init_nondet_~i~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 236 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 01:54:05,976 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 01:54:05,976 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 01:54:05,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-11-23 01:54:05,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418453161] [2021-11-23 01:54:05,976 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 01:54:05,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 01:54:05,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:54:05,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 01:54:05,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2021-11-23 01:54:05,978 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 01:54:06,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:54:06,021 INFO L93 Difference]: Finished difference Result 109 states and 124 transitions. [2021-11-23 01:54:06,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 01:54:06,021 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 96 [2021-11-23 01:54:06,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:54:06,022 INFO L225 Difference]: With dead ends: 109 [2021-11-23 01:54:06,022 INFO L226 Difference]: Without dead ends: 89 [2021-11-23 01:54:06,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2021-11-23 01:54:06,024 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 01:54:06,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 01:54:06,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-23 01:54:06,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-11-23 01:54:06,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 84 states have internal predecessors, (87), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 01:54:06,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2021-11-23 01:54:06,046 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 96 [2021-11-23 01:54:06,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:54:06,047 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2021-11-23 01:54:06,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 01:54:06,047 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2021-11-23 01:54:06,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-23 01:54:06,054 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:54:06,054 INFO L514 BasicCegarLoop]: trace histogram [60, 30, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:54:06,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 01:54:06,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-23 01:54:06,275 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:54:06,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:54:06,276 INFO L85 PathProgramCache]: Analyzing trace with hash 340856441, now seen corresponding path program 9 times [2021-11-23 01:54:06,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:54:06,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492723543] [2021-11-23 01:54:06,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:54:06,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:54:06,322 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 01:54:06,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1868141364] [2021-11-23 01:54:06,323 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 01:54:06,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:54:06,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:54:06,324 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:54:06,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 01:54:06,468 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 01:54:06,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 01:54:06,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 01:54:06,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:54:06,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2374 backedges. 244 proven. 55 refuted. 0 times theorem prover too weak. 2075 trivial. 0 not checked. [2021-11-23 01:54:06,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:54:07,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2374 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 2075 trivial. 0 not checked. [2021-11-23 01:54:07,023 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:54:07,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492723543] [2021-11-23 01:54:07,024 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 01:54:07,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868141364] [2021-11-23 01:54:07,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868141364] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:54:07,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1816877445] [2021-11-23 01:54:07,026 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 01:54:07,026 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:54:07,027 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:54:07,027 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:54:07,027 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:54:07,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:07,053 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 01:54:07,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-23 01:54:07,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:07,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-23 01:54:07,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:07,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 01:54:07,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:07,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:54:07,162 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 01:54:07,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 222 treesize of output 221 [2021-11-23 01:54:07,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 01:54:07,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:07,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-23 01:54:07,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:07,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:07,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:54:07,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2021-11-23 01:54:07,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:07,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:07,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:07,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:07,753 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-23 01:54:07,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2021-11-23 01:54:07,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:07,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-23 01:54:07,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:54:07,995 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2021-11-23 01:54:08,099 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:54:14,957 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5612#(and (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.offset|) (<= 0 |ULTIMATE.start_init_nondet_~x#1.offset|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= |ULTIMATE.start_init_nondet_#in~x#1.offset| 0) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= |ULTIMATE.start_init_nondet_~x#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_~x#1.base|) (exists ((v_rangesum_~cnt~0_BEFORE_RETURN_53 Int)) (and (<= 0 v_rangesum_~cnt~0_BEFORE_RETURN_53) (or (and (exists ((v_rangesum_~ret~0_BEFORE_RETURN_53 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_53 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_53 v_rangesum_~cnt~0_BEFORE_RETURN_53) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_53 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_53 v_rangesum_~cnt~0_BEFORE_RETURN_53)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_53 v_rangesum_~cnt~0_BEFORE_RETURN_53) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_53 v_rangesum_~cnt~0_BEFORE_RETURN_53)) 4294967296) 2147483647) (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_53 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_53 v_rangesum_~cnt~0_BEFORE_RETURN_53) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_53 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_53 v_rangesum_~cnt~0_BEFORE_RETURN_53)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_53 v_rangesum_~cnt~0_BEFORE_RETURN_53) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_53 v_rangesum_~cnt~0_BEFORE_RETURN_53)) 4294967296) (+ (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_53 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_53 v_rangesum_~cnt~0_BEFORE_RETURN_53) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_53 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_53 v_rangesum_~cnt~0_BEFORE_RETURN_53)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_53 v_rangesum_~cnt~0_BEFORE_RETURN_53) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_53 v_rangesum_~cnt~0_BEFORE_RETURN_53)) 4294967296) (- 4294967296))))) (not (= v_rangesum_~cnt~0_BEFORE_RETURN_53 0))) (and (= v_rangesum_~cnt~0_BEFORE_RETURN_53 0) (= |ULTIMATE.start_main_~ret5~0#1| 0))))) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 59 |ULTIMATE.start_main_~i~2#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.base|) (<= 60 |ULTIMATE.start_init_nondet_~i~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 236 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 01:54:14,957 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 01:54:14,957 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 01:54:14,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-11-23 01:54:14,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954349634] [2021-11-23 01:54:14,958 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 01:54:14,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-23 01:54:14,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:54:14,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-23 01:54:14,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=996, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 01:54:14,959 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 01:54:15,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:54:15,030 INFO L93 Difference]: Finished difference Result 127 states and 148 transitions. [2021-11-23 01:54:15,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 01:54:15,031 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 114 [2021-11-23 01:54:15,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:54:15,034 INFO L225 Difference]: With dead ends: 127 [2021-11-23 01:54:15,034 INFO L226 Difference]: Without dead ends: 101 [2021-11-23 01:54:15,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=336, Invalid=996, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 01:54:15,036 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:54:15,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:54:15,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-23 01:54:15,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-11-23 01:54:15,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.03125) internal successors, (99), 96 states have internal predecessors, (99), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 01:54:15,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2021-11-23 01:54:15,055 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 114 [2021-11-23 01:54:15,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:54:15,056 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2021-11-23 01:54:15,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 01:54:15,057 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2021-11-23 01:54:15,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-23 01:54:15,060 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:54:15,060 INFO L514 BasicCegarLoop]: trace histogram [66, 60, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:54:15,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-23 01:54:15,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:54:15,286 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:54:15,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:54:15,286 INFO L85 PathProgramCache]: Analyzing trace with hash -284788999, now seen corresponding path program 10 times [2021-11-23 01:54:15,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:54:15,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056566390] [2021-11-23 01:54:15,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:54:15,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:54:15,329 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 01:54:15,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [304526426] [2021-11-23 01:54:15,330 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 01:54:15,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:54:15,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:54:15,331 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:54:15,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 01:54:15,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:54:15,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 01:54:15,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:54:15,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4192 backedges. 1060 proven. 253 refuted. 0 times theorem prover too weak. 2879 trivial. 0 not checked. [2021-11-23 01:54:15,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:54:16,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4192 backedges. 0 proven. 1313 refuted. 0 times theorem prover too weak. 2879 trivial. 0 not checked. [2021-11-23 01:54:16,722 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:54:16,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056566390] [2021-11-23 01:54:16,722 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 01:54:16,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304526426] [2021-11-23 01:54:16,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304526426] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:54:16,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1237450343] [2021-11-23 01:54:16,724 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 01:54:16,724 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:54:16,725 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:54:16,725 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:54:16,725 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:54:16,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:16,763 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 01:54:16,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-23 01:54:16,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:16,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-23 01:54:16,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:16,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 01:54:16,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:16,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:54:16,861 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 01:54:16,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 222 treesize of output 221 [2021-11-23 01:54:16,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 01:54:17,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:17,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-23 01:54:17,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:17,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:17,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:54:17,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2021-11-23 01:54:17,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:17,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:17,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:17,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:17,452 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-23 01:54:17,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2021-11-23 01:54:17,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:17,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-23 01:54:17,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:54:17,724 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2021-11-23 01:54:17,865 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:54:22,863 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7000#(and (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.offset|) (<= 0 |ULTIMATE.start_init_nondet_~x#1.offset|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= |ULTIMATE.start_init_nondet_#in~x#1.offset| 0) (exists ((v_rangesum_~cnt~0_BEFORE_RETURN_59 Int)) (and (<= 0 v_rangesum_~cnt~0_BEFORE_RETURN_59) (or (and (not (= v_rangesum_~cnt~0_BEFORE_RETURN_59 0)) (exists ((v_rangesum_~ret~0_BEFORE_RETURN_59 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_59 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_59 v_rangesum_~cnt~0_BEFORE_RETURN_59) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_59 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_59 v_rangesum_~cnt~0_BEFORE_RETURN_59)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_59 v_rangesum_~cnt~0_BEFORE_RETURN_59) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_59 v_rangesum_~cnt~0_BEFORE_RETURN_59)) 4294967296) 2147483647) (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_59 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_59 v_rangesum_~cnt~0_BEFORE_RETURN_59) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_59 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_59 v_rangesum_~cnt~0_BEFORE_RETURN_59)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_59 v_rangesum_~cnt~0_BEFORE_RETURN_59) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_59 v_rangesum_~cnt~0_BEFORE_RETURN_59)) 4294967296) (+ (- 4294967296) (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_59 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_59 v_rangesum_~cnt~0_BEFORE_RETURN_59) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_59 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_59 v_rangesum_~cnt~0_BEFORE_RETURN_59)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_59 v_rangesum_~cnt~0_BEFORE_RETURN_59) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_59 v_rangesum_~cnt~0_BEFORE_RETURN_59)) 4294967296)))))) (and (= v_rangesum_~cnt~0_BEFORE_RETURN_59 0) (= |ULTIMATE.start_main_~ret5~0#1| 0))))) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= |ULTIMATE.start_init_nondet_~x#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_~x#1.base|) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 59 |ULTIMATE.start_main_~i~2#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.base|) (<= 60 |ULTIMATE.start_init_nondet_~i~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 236 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 01:54:22,863 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 01:54:22,863 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 01:54:22,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2021-11-23 01:54:22,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135965527] [2021-11-23 01:54:22,863 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 01:54:22,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-23 01:54:22,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:54:22,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-23 01:54:22,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1188, Invalid=2472, Unknown=0, NotChecked=0, Total=3660 [2021-11-23 01:54:22,866 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand has 48 states, 48 states have (on average 1.3333333333333333) internal successors, (64), 48 states have internal predecessors, (64), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 01:54:23,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:54:23,009 INFO L93 Difference]: Finished difference Result 163 states and 196 transitions. [2021-11-23 01:54:23,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-23 01:54:23,009 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.3333333333333333) internal successors, (64), 48 states have internal predecessors, (64), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 150 [2021-11-23 01:54:23,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:54:23,011 INFO L225 Difference]: With dead ends: 163 [2021-11-23 01:54:23,011 INFO L226 Difference]: Without dead ends: 125 [2021-11-23 01:54:23,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 389 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1188, Invalid=2472, Unknown=0, NotChecked=0, Total=3660 [2021-11-23 01:54:23,013 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:54:23,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:54:23,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-23 01:54:23,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-11-23 01:54:23,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.025) internal successors, (123), 120 states have internal predecessors, (123), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 01:54:23,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 129 transitions. [2021-11-23 01:54:23,026 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 129 transitions. Word has length 150 [2021-11-23 01:54:23,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:54:23,026 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 129 transitions. [2021-11-23 01:54:23,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.3333333333333333) internal successors, (64), 48 states have internal predecessors, (64), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 01:54:23,026 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 129 transitions. [2021-11-23 01:54:23,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-23 01:54:23,029 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:54:23,029 INFO L514 BasicCegarLoop]: trace histogram [138, 60, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:54:23,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 01:54:23,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:54:23,254 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:54:23,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:54:23,254 INFO L85 PathProgramCache]: Analyzing trace with hash 628066297, now seen corresponding path program 11 times [2021-11-23 01:54:23,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:54:23,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44719509] [2021-11-23 01:54:23,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:54:23,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:54:23,330 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 01:54:23,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1213125249] [2021-11-23 01:54:23,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 01:54:23,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:54:23,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:54:23,334 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:54:23,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 01:54:23,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 01:54:23,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 01:54:23,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 01:54:23,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:54:23,920 INFO L134 CoverageAnalysis]: Checked inductivity of 11716 backedges. 4422 proven. 10 refuted. 0 times theorem prover too weak. 7284 trivial. 0 not checked. [2021-11-23 01:54:23,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:54:24,189 INFO L134 CoverageAnalysis]: Checked inductivity of 11716 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 11706 trivial. 0 not checked. [2021-11-23 01:54:24,189 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:54:24,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44719509] [2021-11-23 01:54:24,189 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 01:54:24,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213125249] [2021-11-23 01:54:24,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213125249] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:54:24,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1354145535] [2021-11-23 01:54:24,192 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 01:54:24,192 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:54:24,192 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:54:24,193 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:54:24,193 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:54:24,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:24,218 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 01:54:24,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-23 01:54:24,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:24,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-23 01:54:24,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:24,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 01:54:24,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:24,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:24,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:24,336 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 01:54:24,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 232 treesize of output 220 [2021-11-23 01:54:24,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 01:54:24,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:24,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-23 01:54:24,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:24,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2021-11-23 01:54:24,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:24,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:24,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:24,867 INFO L354 Elim1Store]: treesize reduction 65, result has 27.0 percent of original size [2021-11-23 01:54:24,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 80 [2021-11-23 01:54:24,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:24,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-23 01:54:24,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:54:25,198 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2021-11-23 01:54:25,303 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:54:31,856 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8904#(and (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.offset|) (<= 0 |ULTIMATE.start_init_nondet_~x#1.offset|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (exists ((v_rangesum_~cnt~0_BEFORE_RETURN_65 Int)) (and (<= 0 v_rangesum_~cnt~0_BEFORE_RETURN_65) (or (and (= v_rangesum_~cnt~0_BEFORE_RETURN_65 0) (= |ULTIMATE.start_main_~ret5~0#1| 0)) (and (exists ((v_rangesum_~ret~0_BEFORE_RETURN_65 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_65 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_65 v_rangesum_~cnt~0_BEFORE_RETURN_65) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_65 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_65 v_rangesum_~cnt~0_BEFORE_RETURN_65)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_65 v_rangesum_~cnt~0_BEFORE_RETURN_65) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_65 v_rangesum_~cnt~0_BEFORE_RETURN_65)) 4294967296) 2147483647) (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_65 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_65 v_rangesum_~cnt~0_BEFORE_RETURN_65) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_65 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_65 v_rangesum_~cnt~0_BEFORE_RETURN_65)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_65 v_rangesum_~cnt~0_BEFORE_RETURN_65) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_65 v_rangesum_~cnt~0_BEFORE_RETURN_65)) 4294967296) (+ (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_65 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_65 v_rangesum_~cnt~0_BEFORE_RETURN_65) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_65 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_65 v_rangesum_~cnt~0_BEFORE_RETURN_65)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_65 v_rangesum_~cnt~0_BEFORE_RETURN_65) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_65 v_rangesum_~cnt~0_BEFORE_RETURN_65)) 4294967296) (- 4294967296))))) (not (= v_rangesum_~cnt~0_BEFORE_RETURN_65 0)))))) (<= |ULTIMATE.start_init_nondet_#in~x#1.offset| 0) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= |ULTIMATE.start_init_nondet_~x#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_~x#1.base|) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 59 |ULTIMATE.start_main_~i~2#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.base|) (<= 60 |ULTIMATE.start_init_nondet_~i~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 236 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 01:54:31,856 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 01:54:31,856 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 01:54:31,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-11-23 01:54:31,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690876501] [2021-11-23 01:54:31,857 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 01:54:31,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 01:54:31,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:54:31,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 01:54:31,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2021-11-23 01:54:31,858 INFO L87 Difference]: Start difference. First operand 125 states and 129 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 01:54:31,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:54:31,886 INFO L93 Difference]: Finished difference Result 185 states and 195 transitions. [2021-11-23 01:54:31,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 01:54:31,886 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 222 [2021-11-23 01:54:31,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:54:31,887 INFO L225 Difference]: With dead ends: 185 [2021-11-23 01:54:31,887 INFO L226 Difference]: Without dead ends: 131 [2021-11-23 01:54:31,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 664 GetRequests, 641 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2021-11-23 01:54:31,891 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 01:54:31,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 01:54:31,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-23 01:54:31,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-11-23 01:54:31,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.0238095238095237) internal successors, (129), 126 states have internal predecessors, (129), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 01:54:31,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 135 transitions. [2021-11-23 01:54:31,898 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 135 transitions. Word has length 222 [2021-11-23 01:54:31,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:54:31,898 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 135 transitions. [2021-11-23 01:54:31,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 01:54:31,899 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 135 transitions. [2021-11-23 01:54:31,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-11-23 01:54:31,901 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:54:31,901 INFO L514 BasicCegarLoop]: trace histogram [138, 60, 10, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:54:31,938 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-11-23 01:54:32,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-23 01:54:32,118 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:54:32,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:54:32,118 INFO L85 PathProgramCache]: Analyzing trace with hash -616382471, now seen corresponding path program 12 times [2021-11-23 01:54:32,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:54:32,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270997681] [2021-11-23 01:54:32,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:54:32,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:54:32,183 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 01:54:32,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [821208391] [2021-11-23 01:54:32,183 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 01:54:32,184 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:54:32,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:54:32,185 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:54:32,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-23 01:54:32,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 01:54:32,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 01:54:32,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 1075 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-23 01:54:32,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:54:33,606 INFO L134 CoverageAnalysis]: Checked inductivity of 11761 backedges. 4420 proven. 1081 refuted. 0 times theorem prover too weak. 6260 trivial. 0 not checked. [2021-11-23 01:54:33,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:54:34,467 INFO L134 CoverageAnalysis]: Checked inductivity of 11761 backedges. 0 proven. 5501 refuted. 0 times theorem prover too weak. 6260 trivial. 0 not checked. [2021-11-23 01:54:34,468 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:54:34,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270997681] [2021-11-23 01:54:34,468 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 01:54:34,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821208391] [2021-11-23 01:54:34,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821208391] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:54:34,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [262579645] [2021-11-23 01:54:34,470 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 01:54:34,471 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:54:34,471 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:54:34,471 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:54:34,471 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:54:34,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:34,498 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 01:54:34,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2021-11-23 01:54:34,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:34,519 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 01:54:34,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-23 01:54:34,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:34,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 01:54:34,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:34,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:34,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:34,611 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 01:54:34,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 232 treesize of output 220 [2021-11-23 01:54:34,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 01:54:34,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:34,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-23 01:54:35,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:35,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:35,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:54:35,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2021-11-23 01:54:35,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:35,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:35,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:35,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:35,111 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-23 01:54:35,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2021-11-23 01:54:35,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:35,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-23 01:54:35,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:54:35,398 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2021-11-23 01:54:35,522 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:54:43,363 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10952#(and (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.offset|) (<= 0 |ULTIMATE.start_init_nondet_~x#1.offset|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= |ULTIMATE.start_init_nondet_#in~x#1.offset| 0) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= |ULTIMATE.start_init_nondet_~x#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_~x#1.base|) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (exists ((v_rangesum_~cnt~0_BEFORE_RETURN_71 Int)) (and (<= 0 v_rangesum_~cnt~0_BEFORE_RETURN_71) (or (and (exists ((v_rangesum_~ret~0_BEFORE_RETURN_71 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_71 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_71 v_rangesum_~cnt~0_BEFORE_RETURN_71) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_71 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_71 v_rangesum_~cnt~0_BEFORE_RETURN_71)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_71 v_rangesum_~cnt~0_BEFORE_RETURN_71) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_71 v_rangesum_~cnt~0_BEFORE_RETURN_71)) 4294967296) 2147483647) (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_71 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_71 v_rangesum_~cnt~0_BEFORE_RETURN_71) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_71 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_71 v_rangesum_~cnt~0_BEFORE_RETURN_71)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_71 v_rangesum_~cnt~0_BEFORE_RETURN_71) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_71 v_rangesum_~cnt~0_BEFORE_RETURN_71)) 4294967296) (+ (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_71 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_71 v_rangesum_~cnt~0_BEFORE_RETURN_71) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_71 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_71 v_rangesum_~cnt~0_BEFORE_RETURN_71)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_71 v_rangesum_~cnt~0_BEFORE_RETURN_71) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_71 v_rangesum_~cnt~0_BEFORE_RETURN_71)) 4294967296) (- 4294967296))))) (not (= v_rangesum_~cnt~0_BEFORE_RETURN_71 0))) (and (= v_rangesum_~cnt~0_BEFORE_RETURN_71 0) (= |ULTIMATE.start_main_~ret5~0#1| 0))))) (<= 59 |ULTIMATE.start_main_~i~2#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.base|) (<= 60 |ULTIMATE.start_init_nondet_~i~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 236 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 01:54:43,363 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 01:54:43,363 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 01:54:43,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 62 [2021-11-23 01:54:43,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998346662] [2021-11-23 01:54:43,363 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 01:54:43,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-23 01:54:43,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:54:43,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-23 01:54:43,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1951, Invalid=3599, Unknown=0, NotChecked=0, Total=5550 [2021-11-23 01:54:43,367 INFO L87 Difference]: Start difference. First operand 131 states and 135 transitions. Second operand has 62 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 62 states have internal predecessors, (79), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 01:54:43,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:54:43,474 INFO L93 Difference]: Finished difference Result 213 states and 236 transitions. [2021-11-23 01:54:43,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-23 01:54:43,474 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 62 states have internal predecessors, (79), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 228 [2021-11-23 01:54:43,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:54:43,475 INFO L225 Difference]: With dead ends: 213 [2021-11-23 01:54:43,476 INFO L226 Difference]: Without dead ends: 145 [2021-11-23 01:54:43,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 682 GetRequests, 608 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=1951, Invalid=3599, Unknown=0, NotChecked=0, Total=5550 [2021-11-23 01:54:43,479 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:54:43,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:54:43,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-23 01:54:43,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-11-23 01:54:43,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.0214285714285714) internal successors, (143), 140 states have internal predecessors, (143), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 01:54:43,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 149 transitions. [2021-11-23 01:54:43,488 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 149 transitions. Word has length 228 [2021-11-23 01:54:43,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:54:43,489 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 149 transitions. [2021-11-23 01:54:43,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 62 states have internal predecessors, (79), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 01:54:43,489 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 149 transitions. [2021-11-23 01:54:43,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2021-11-23 01:54:43,493 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:54:43,494 INFO L514 BasicCegarLoop]: trace histogram [180, 60, 10, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:54:43,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-23 01:54:43,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:54:43,722 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:54:43,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:54:43,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1857566521, now seen corresponding path program 13 times [2021-11-23 01:54:43,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:54:43,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672483016] [2021-11-23 01:54:43,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:54:43,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:54:43,783 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 01:54:43,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2111844312] [2021-11-23 01:54:43,783 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 01:54:43,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:54:43,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:54:43,784 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:54:43,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-23 01:54:44,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:54:44,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 1243 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 01:54:44,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:54:44,432 INFO L134 CoverageAnalysis]: Checked inductivity of 18544 backedges. 7446 proven. 55 refuted. 0 times theorem prover too weak. 11043 trivial. 0 not checked. [2021-11-23 01:54:44,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:54:44,855 INFO L134 CoverageAnalysis]: Checked inductivity of 18544 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 18489 trivial. 0 not checked. [2021-11-23 01:54:44,855 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:54:44,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672483016] [2021-11-23 01:54:44,855 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 01:54:44,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111844312] [2021-11-23 01:54:44,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111844312] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:54:44,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [875097774] [2021-11-23 01:54:44,858 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 01:54:44,858 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:54:44,858 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:54:44,858 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:54:44,859 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:54:44,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:44,901 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 01:54:44,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-23 01:54:44,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:44,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-23 01:54:44,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:44,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 01:54:44,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:44,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:44,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:45,015 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 01:54:45,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 232 treesize of output 220 [2021-11-23 01:54:45,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 01:54:45,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:45,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-23 01:54:45,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:45,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2021-11-23 01:54:45,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:45,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:45,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:45,562 INFO L354 Elim1Store]: treesize reduction 65, result has 27.0 percent of original size [2021-11-23 01:54:45,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 80 [2021-11-23 01:54:45,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:54:45,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-23 01:54:45,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:54:45,877 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2021-11-23 01:54:45,991 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:54:52,645 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13296#(and (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.offset|) (<= 0 |ULTIMATE.start_init_nondet_~x#1.offset|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= |ULTIMATE.start_init_nondet_#in~x#1.offset| 0) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= |ULTIMATE.start_init_nondet_~x#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_~x#1.base|) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 59 |ULTIMATE.start_main_~i~2#1|) (exists ((v_rangesum_~cnt~0_BEFORE_RETURN_77 Int)) (and (<= 0 v_rangesum_~cnt~0_BEFORE_RETURN_77) (or (and (not (= v_rangesum_~cnt~0_BEFORE_RETURN_77 0)) (exists ((v_rangesum_~ret~0_BEFORE_RETURN_77 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_77 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_77 v_rangesum_~cnt~0_BEFORE_RETURN_77) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_77 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_77 v_rangesum_~cnt~0_BEFORE_RETURN_77)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_77 v_rangesum_~cnt~0_BEFORE_RETURN_77) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_77 v_rangesum_~cnt~0_BEFORE_RETURN_77)) 4294967296) 2147483647) (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_77 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_77 v_rangesum_~cnt~0_BEFORE_RETURN_77) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_77 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_77 v_rangesum_~cnt~0_BEFORE_RETURN_77)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_77 v_rangesum_~cnt~0_BEFORE_RETURN_77) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_77 v_rangesum_~cnt~0_BEFORE_RETURN_77)) 4294967296) (+ (- 4294967296) (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_77 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_77 v_rangesum_~cnt~0_BEFORE_RETURN_77) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_77 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_77 v_rangesum_~cnt~0_BEFORE_RETURN_77)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_77 v_rangesum_~cnt~0_BEFORE_RETURN_77) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_77 v_rangesum_~cnt~0_BEFORE_RETURN_77)) 4294967296)))))) (and (= |ULTIMATE.start_main_~ret5~0#1| 0) (= v_rangesum_~cnt~0_BEFORE_RETURN_77 0))))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.base|) (<= 60 |ULTIMATE.start_init_nondet_~i~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 236 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 01:54:52,645 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 01:54:52,645 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 01:54:52,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-11-23 01:54:52,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689425027] [2021-11-23 01:54:52,645 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 01:54:52,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-23 01:54:52,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:54:52,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-23 01:54:52,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=996, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 01:54:52,647 INFO L87 Difference]: Start difference. First operand 145 states and 149 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 01:54:52,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:54:52,708 INFO L93 Difference]: Finished difference Result 225 states and 241 transitions. [2021-11-23 01:54:52,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 01:54:52,709 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 270 [2021-11-23 01:54:52,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:54:52,711 INFO L225 Difference]: With dead ends: 225 [2021-11-23 01:54:52,711 INFO L226 Difference]: Without dead ends: 157 [2021-11-23 01:54:52,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 808 GetRequests, 773 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=336, Invalid=996, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 01:54:52,713 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:54:52,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:54:52,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-11-23 01:54:52,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2021-11-23 01:54:52,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.019736842105263) internal successors, (155), 152 states have internal predecessors, (155), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 01:54:52,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 161 transitions. [2021-11-23 01:54:52,722 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 161 transitions. Word has length 270 [2021-11-23 01:54:52,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:54:52,723 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 161 transitions. [2021-11-23 01:54:52,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 01:54:52,723 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 161 transitions. [2021-11-23 01:54:52,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2021-11-23 01:54:52,725 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:54:52,726 INFO L514 BasicCegarLoop]: trace histogram [180, 60, 22, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:54:52,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-23 01:54:52,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-23 01:54:52,938 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:54:52,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:54:52,938 INFO L85 PathProgramCache]: Analyzing trace with hash -707008711, now seen corresponding path program 14 times [2021-11-23 01:54:52,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:54:52,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006502997] [2021-11-23 01:54:52,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:54:52,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:54:52,994 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 01:54:52,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [886043756] [2021-11-23 01:54:52,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 01:54:52,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:54:52,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:54:52,996 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:54:53,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-23 01:55:06,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-11-23 01:55:06,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 01:55:06,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 01:55:06,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:55:07,381 INFO L134 CoverageAnalysis]: Checked inductivity of 18742 backedges. 7446 proven. 253 refuted. 0 times theorem prover too weak. 11043 trivial. 0 not checked. [2021-11-23 01:55:07,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:55:08,261 INFO L134 CoverageAnalysis]: Checked inductivity of 18742 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 18489 trivial. 0 not checked. [2021-11-23 01:55:08,261 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:55:08,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006502997] [2021-11-23 01:55:08,261 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 01:55:08,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886043756] [2021-11-23 01:55:08,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886043756] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:55:08,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [152200746] [2021-11-23 01:55:08,263 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 01:55:08,263 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:55:08,264 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:55:08,264 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:55:08,264 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:55:08,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:55:08,310 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 01:55:08,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2021-11-23 01:55:08,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:55:08,334 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 01:55:08,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-23 01:55:08,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:55:08,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 01:55:08,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:55:08,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:55:08,418 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 01:55:08,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 222 treesize of output 221 [2021-11-23 01:55:08,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 01:55:08,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:55:08,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-23 01:55:08,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:55:08,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2021-11-23 01:55:08,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:55:08,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:55:08,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:55:08,976 INFO L354 Elim1Store]: treesize reduction 60, result has 32.6 percent of original size [2021-11-23 01:55:08,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 85 [2021-11-23 01:55:09,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:55:09,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-23 01:55:09,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:55:09,293 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2021-11-23 01:55:09,377 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:55:19,323 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15786#(and (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.offset|) (<= 0 |ULTIMATE.start_init_nondet_~x#1.offset|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= |ULTIMATE.start_init_nondet_#in~x#1.offset| 0) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= |ULTIMATE.start_init_nondet_~x#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_~x#1.base|) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 59 |ULTIMATE.start_main_~i~2#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.base|) (exists ((v_rangesum_~cnt~0_BEFORE_RETURN_83 Int)) (and (or (and (exists ((v_rangesum_~ret~0_BEFORE_RETURN_83 Int)) (= (ite (<= (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_83 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_83 v_rangesum_~cnt~0_BEFORE_RETURN_83) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_83 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_83 v_rangesum_~cnt~0_BEFORE_RETURN_83)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_83 v_rangesum_~cnt~0_BEFORE_RETURN_83) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_83 v_rangesum_~cnt~0_BEFORE_RETURN_83)) 4294967296) 2147483647) (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_83 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_83 v_rangesum_~cnt~0_BEFORE_RETURN_83) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_83 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_83 v_rangesum_~cnt~0_BEFORE_RETURN_83)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_83 v_rangesum_~cnt~0_BEFORE_RETURN_83) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_83 v_rangesum_~cnt~0_BEFORE_RETURN_83)) 4294967296) (+ (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_83 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_83 v_rangesum_~cnt~0_BEFORE_RETURN_83) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_83 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_83 v_rangesum_~cnt~0_BEFORE_RETURN_83)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_83 v_rangesum_~cnt~0_BEFORE_RETURN_83) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_83 v_rangesum_~cnt~0_BEFORE_RETURN_83)) 4294967296) (- 4294967296))) |ULTIMATE.start_main_~ret5~0#1|)) (not (= v_rangesum_~cnt~0_BEFORE_RETURN_83 0))) (and (= v_rangesum_~cnt~0_BEFORE_RETURN_83 0) (= |ULTIMATE.start_main_~ret5~0#1| 0))) (<= 0 v_rangesum_~cnt~0_BEFORE_RETURN_83))) (<= 60 |ULTIMATE.start_init_nondet_~i~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 236 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 01:55:19,323 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 01:55:19,323 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 01:55:19,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2021-11-23 01:55:19,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490984665] [2021-11-23 01:55:19,323 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 01:55:19,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-23 01:55:19,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:55:19,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-23 01:55:19,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1188, Invalid=2472, Unknown=0, NotChecked=0, Total=3660 [2021-11-23 01:55:19,326 INFO L87 Difference]: Start difference. First operand 157 states and 161 transitions. Second operand has 48 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 48 states have internal predecessors, (61), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 01:55:19,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:55:19,460 INFO L93 Difference]: Finished difference Result 249 states and 277 transitions. [2021-11-23 01:55:19,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-23 01:55:19,461 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 48 states have internal predecessors, (61), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 282 [2021-11-23 01:55:19,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:55:19,462 INFO L225 Difference]: With dead ends: 249 [2021-11-23 01:55:19,462 INFO L226 Difference]: Without dead ends: 181 [2021-11-23 01:55:19,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 844 GetRequests, 785 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=1188, Invalid=2472, Unknown=0, NotChecked=0, Total=3660 [2021-11-23 01:55:19,464 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:55:19,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:55:19,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-23 01:55:19,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2021-11-23 01:55:19,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.0170454545454546) internal successors, (179), 176 states have internal predecessors, (179), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 01:55:19,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 185 transitions. [2021-11-23 01:55:19,473 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 185 transitions. Word has length 282 [2021-11-23 01:55:19,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:55:19,474 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 185 transitions. [2021-11-23 01:55:19,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 48 states have internal predecessors, (61), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 01:55:19,474 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 185 transitions. [2021-11-23 01:55:19,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2021-11-23 01:55:19,476 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:55:19,477 INFO L514 BasicCegarLoop]: trace histogram [180, 60, 46, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:55:19,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-23 01:55:19,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-23 01:55:19,698 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:55:19,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:55:19,698 INFO L85 PathProgramCache]: Analyzing trace with hash -670349511, now seen corresponding path program 15 times [2021-11-23 01:55:19,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:55:19,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855132818] [2021-11-23 01:55:19,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:55:19,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:55:19,746 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 01:55:19,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2057984480] [2021-11-23 01:55:19,747 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 01:55:19,747 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:55:19,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:55:19,748 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:55:19,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-23 01:55:20,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 01:55:20,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 01:55:20,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 1387 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-23 01:55:20,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:55:21,278 INFO L134 CoverageAnalysis]: Checked inductivity of 19570 backedges. 7446 proven. 1081 refuted. 0 times theorem prover too weak. 11043 trivial. 0 not checked. [2021-11-23 01:55:21,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:55:22,194 INFO L134 CoverageAnalysis]: Checked inductivity of 19570 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 18489 trivial. 0 not checked. [2021-11-23 01:55:22,194 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:55:22,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855132818] [2021-11-23 01:55:22,194 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 01:55:22,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057984480] [2021-11-23 01:55:22,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057984480] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:55:22,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [665239831] [2021-11-23 01:55:22,196 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 01:55:22,196 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:55:22,196 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:55:22,197 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:55:22,197 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:55:22,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:55:22,228 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 01:55:22,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-23 01:55:22,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:55:22,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-23 01:55:22,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:55:22,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 01:55:22,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:55:22,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:55:22,324 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 01:55:22,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 222 treesize of output 221 [2021-11-23 01:55:22,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 01:55:22,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:55:22,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-23 01:55:22,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:55:22,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2021-11-23 01:55:22,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:55:22,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:55:22,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:55:22,855 INFO L354 Elim1Store]: treesize reduction 65, result has 27.0 percent of original size [2021-11-23 01:55:22,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 80 [2021-11-23 01:55:22,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:55:22,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-23 01:55:22,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 01:55:23,195 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2021-11-23 01:55:23,303 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:55:28,906 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18529#(and (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.offset|) (<= 0 |ULTIMATE.start_init_nondet_~x#1.offset|) (exists ((v_rangesum_~cnt~0_BEFORE_RETURN_90 Int)) (and (<= 0 v_rangesum_~cnt~0_BEFORE_RETURN_90) (or (and (= v_rangesum_~cnt~0_BEFORE_RETURN_90 0) (= |ULTIMATE.start_main_~ret5~0#1| 0)) (and (not (= v_rangesum_~cnt~0_BEFORE_RETURN_90 0)) (exists ((v_rangesum_~ret~0_BEFORE_RETURN_90 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_90 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_90 v_rangesum_~cnt~0_BEFORE_RETURN_90) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_90 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_90 v_rangesum_~cnt~0_BEFORE_RETURN_90)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_90 v_rangesum_~cnt~0_BEFORE_RETURN_90) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_90 v_rangesum_~cnt~0_BEFORE_RETURN_90)) 4294967296) 2147483647) (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_90 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_90 v_rangesum_~cnt~0_BEFORE_RETURN_90) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_90 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_90 v_rangesum_~cnt~0_BEFORE_RETURN_90)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_90 v_rangesum_~cnt~0_BEFORE_RETURN_90) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_90 v_rangesum_~cnt~0_BEFORE_RETURN_90)) 4294967296) (+ (mod (ite (and (< v_rangesum_~ret~0_BEFORE_RETURN_90 0) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_90 v_rangesum_~cnt~0_BEFORE_RETURN_90) 0))) (ite (< v_rangesum_~cnt~0_BEFORE_RETURN_90 0) (+ (- 1) (div v_rangesum_~ret~0_BEFORE_RETURN_90 v_rangesum_~cnt~0_BEFORE_RETURN_90)) (+ (div v_rangesum_~ret~0_BEFORE_RETURN_90 v_rangesum_~cnt~0_BEFORE_RETURN_90) 1)) (div v_rangesum_~ret~0_BEFORE_RETURN_90 v_rangesum_~cnt~0_BEFORE_RETURN_90)) 4294967296) (- 4294967296))))))))) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= |ULTIMATE.start_init_nondet_#in~x#1.offset| 0) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= |ULTIMATE.start_init_nondet_~x#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_~x#1.base|) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 59 |ULTIMATE.start_main_~i~2#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_init_nondet_#in~x#1.base|) (<= 60 |ULTIMATE.start_init_nondet_~i~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 236 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 01:55:28,906 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 01:55:28,906 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 01:55:28,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 61 [2021-11-23 01:55:28,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500889099] [2021-11-23 01:55:28,907 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 01:55:28,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-23 01:55:28,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:55:28,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-23 01:55:28,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1890, Invalid=3512, Unknown=0, NotChecked=0, Total=5402 [2021-11-23 01:55:28,909 INFO L87 Difference]: Start difference. First operand 181 states and 185 transitions. Second operand has 61 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 61 states have internal predecessors, (75), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 01:55:29,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:55:29,025 INFO L93 Difference]: Finished difference Result 262 states and 279 transitions. [2021-11-23 01:55:29,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-23 01:55:29,026 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 61 states have internal predecessors, (75), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 306 [2021-11-23 01:55:29,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:55:29,028 INFO L225 Difference]: With dead ends: 262 [2021-11-23 01:55:29,028 INFO L226 Difference]: Without dead ends: 194 [2021-11-23 01:55:29,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 916 GetRequests, 843 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1890, Invalid=3512, Unknown=0, NotChecked=0, Total=5402 [2021-11-23 01:55:29,030 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:55:29,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 78 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:55:29,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-11-23 01:55:29,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2021-11-23 01:55:29,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 189 states have (on average 1.0158730158730158) internal successors, (192), 189 states have internal predecessors, (192), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 01:55:29,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 198 transitions. [2021-11-23 01:55:29,039 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 198 transitions. Word has length 306 [2021-11-23 01:55:29,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:55:29,040 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 198 transitions. [2021-11-23 01:55:29,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 61 states have internal predecessors, (75), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 01:55:29,040 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 198 transitions. [2021-11-23 01:55:29,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2021-11-23 01:55:29,042 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:55:29,042 INFO L514 BasicCegarLoop]: trace histogram [180, 60, 59, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:55:29,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-23 01:55:29,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-23 01:55:29,243 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:55:29,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:55:29,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1919207047, now seen corresponding path program 16 times [2021-11-23 01:55:29,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:55:29,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527431502] [2021-11-23 01:55:29,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:55:29,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:55:29,298 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 01:55:29,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [893835540] [2021-11-23 01:55:29,298 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 01:55:29,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:55:29,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:55:29,300 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:55:29,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c0a5b4a-2515-4a32-bb0d-9505768d93dd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process