./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/eqn5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6a47aea7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/eqn5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl --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 4e0883f4fdefc9bee6f97a4f9cfd1a3af8920c2853d796abd89e2a581ffdb6b5 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:31:33,088 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:31:33,090 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:31:33,145 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:31:33,146 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:31:33,153 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:31:33,155 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:31:33,160 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:31:33,163 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:31:33,169 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:31:33,170 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:31:33,172 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:31:33,173 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:31:33,176 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:31:33,178 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:31:33,183 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:31:33,185 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:31:33,186 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:31:33,188 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:31:33,198 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:31:33,200 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:31:33,202 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:31:33,205 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:31:33,207 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:31:33,211 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:31:33,211 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:31:33,212 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:31:33,214 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:31:33,215 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:31:33,216 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:31:33,217 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:31:33,218 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:31:33,220 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:31:33,222 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:31:33,224 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:31:33,224 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:31:33,225 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:31:33,225 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:31:33,225 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:31:33,226 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:31:33,227 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:31:33,228 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:31:33,279 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:31:33,280 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:31:33,281 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:31:33,281 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:31:33,282 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:31:33,282 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:31:33,283 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:31:33,283 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:31:33,283 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:31:33,284 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:31:33,285 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:31:33,285 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:31:33,285 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:31:33,286 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:31:33,286 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:31:33,286 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:31:33,286 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:31:33,287 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:31:33,287 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:31:33,288 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:31:33,288 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:31:33,288 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:31:33,288 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:31:33,289 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:31:33,289 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:31:33,289 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:31:33,291 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:31:33,291 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:31:33,291 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:31:33,292 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:31:33,292 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:31:33,292 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:31:33,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:31:33,293 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:31:33,293 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:31:33,293 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:31:33,294 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:31:33,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:31:33,294 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:31:33,294 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:31:33,294 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:31:33,295 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_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4e0883f4fdefc9bee6f97a4f9cfd1a3af8920c2853d796abd89e2a581ffdb6b5 [2021-11-23 17:31:33,592 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:31:33,623 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:31:33,626 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:31:33,627 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:31:33,628 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:31:33,629 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/array-fpi/eqn5.c [2021-11-23 17:31:33,711 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/data/2355fed8e/6392dae11e044da7ada36c749ada1355/FLAG355883913 [2021-11-23 17:31:34,247 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:31:34,248 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/sv-benchmarks/c/array-fpi/eqn5.c [2021-11-23 17:31:34,254 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/data/2355fed8e/6392dae11e044da7ada36c749ada1355/FLAG355883913 [2021-11-23 17:31:34,615 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/data/2355fed8e/6392dae11e044da7ada36c749ada1355 [2021-11-23 17:31:34,617 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:31:34,619 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:31:34,620 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:31:34,621 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:31:34,636 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:31:34,637 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:31:34" (1/1) ... [2021-11-23 17:31:34,643 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@370a1d89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:34, skipping insertion in model container [2021-11-23 17:31:34,644 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:31:34" (1/1) ... [2021-11-23 17:31:34,651 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:31:34,670 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:31:34,911 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_89862889-dc36-4862-8dcf-2dfd2fff56ea/sv-benchmarks/c/array-fpi/eqn5.c[587,600] [2021-11-23 17:31:34,949 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:31:34,959 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:31:34,977 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_89862889-dc36-4862-8dcf-2dfd2fff56ea/sv-benchmarks/c/array-fpi/eqn5.c[587,600] [2021-11-23 17:31:34,996 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:31:35,013 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:31:35,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:35 WrapperNode [2021-11-23 17:31:35,014 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:31:35,015 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:31:35,015 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:31:35,015 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:31:35,024 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:35" (1/1) ... [2021-11-23 17:31:35,044 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:35" (1/1) ... [2021-11-23 17:31:35,081 INFO L137 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2021-11-23 17:31:35,082 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:31:35,083 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:31:35,083 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:31:35,083 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:31:35,094 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:35" (1/1) ... [2021-11-23 17:31:35,094 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:35" (1/1) ... [2021-11-23 17:31:35,102 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:35" (1/1) ... [2021-11-23 17:31:35,102 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:35" (1/1) ... [2021-11-23 17:31:35,122 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:35" (1/1) ... [2021-11-23 17:31:35,129 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:35" (1/1) ... [2021-11-23 17:31:35,137 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:35" (1/1) ... [2021-11-23 17:31:35,144 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:31:35,145 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:31:35,147 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:31:35,147 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:31:35,148 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:35" (1/1) ... [2021-11-23 17:31:35,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:31:35,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:31:35,186 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:31:35,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:31:35,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:31:35,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:31:35,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 17:31:35,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 17:31:35,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:31:35,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:31:35,248 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 17:31:35,335 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:31:35,337 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:31:35,595 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:31:35,618 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.addBranchEncoders(TransFormulaBuilder.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.parallelComposition(TransFormulaUtils.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.ParallelComposition.(ParallelComposition.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CodeBlockFactory.constructParallelComposition(CodeBlockFactory.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.composeParallel(CfgBuilder.java:1792) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.(CfgBuilder.java:1653) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 17:31:35,622 INFO L158 Benchmark]: Toolchain (without parser) took 1002.64ms. Allocated memory is still 109.1MB. Free memory was 80.6MB in the beginning and 69.5MB in the end (delta: 11.1MB). Peak memory consumption was 8.8MB. Max. memory is 16.1GB. [2021-11-23 17:31:35,623 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 109.1MB. Free memory is still 63.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:31:35,624 INFO L158 Benchmark]: CACSL2BoogieTranslator took 394.00ms. Allocated memory is still 109.1MB. Free memory was 80.6MB in the beginning and 83.8MB in the end (delta: -3.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 17:31:35,625 INFO L158 Benchmark]: Boogie Procedure Inliner took 67.13ms. Allocated memory is still 109.1MB. Free memory was 83.8MB in the beginning and 82.0MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:31:35,641 INFO L158 Benchmark]: Boogie Preprocessor took 60.92ms. Allocated memory is still 109.1MB. Free memory was 82.0MB in the beginning and 80.9MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:31:35,642 INFO L158 Benchmark]: RCFGBuilder took 475.79ms. Allocated memory is still 109.1MB. Free memory was 80.9MB in the beginning and 69.5MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 17:31:35,647 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 109.1MB. Free memory is still 63.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 394.00ms. Allocated memory is still 109.1MB. Free memory was 80.6MB in the beginning and 83.8MB in the end (delta: -3.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 67.13ms. Allocated memory is still 109.1MB. Free memory was 83.8MB in the beginning and 82.0MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 60.92ms. Allocated memory is still 109.1MB. Free memory was 82.0MB in the beginning and 80.9MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 475.79ms. Allocated memory is still 109.1MB. Free memory was 80.9MB in the beginning and 69.5MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 17:31:35,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/eqn5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl --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 4e0883f4fdefc9bee6f97a4f9cfd1a3af8920c2853d796abd89e2a581ffdb6b5 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:31:38,358 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:31:38,362 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:31:38,418 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:31:38,419 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:31:38,420 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:31:38,422 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:31:38,425 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:31:38,428 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:31:38,429 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:31:38,431 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:31:38,432 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:31:38,433 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:31:38,435 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:31:38,437 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:31:38,439 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:31:38,440 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:31:38,442 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:31:38,444 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:31:38,447 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:31:38,450 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:31:38,452 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:31:38,453 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:31:38,455 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:31:38,459 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:31:38,460 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:31:38,461 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:31:38,462 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:31:38,463 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:31:38,464 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:31:38,465 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:31:38,466 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:31:38,468 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:31:38,469 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:31:38,471 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:31:38,471 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:31:38,483 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:31:38,485 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:31:38,486 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:31:38,488 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:31:38,490 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:31:38,491 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:31:38,530 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:31:38,531 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:31:38,531 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:31:38,532 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:31:38,533 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:31:38,533 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:31:38,533 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:31:38,533 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:31:38,534 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:31:38,534 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:31:38,534 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:31:38,534 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:31:38,535 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:31:38,535 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:31:38,536 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:31:38,536 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:31:38,536 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:31:38,536 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:31:38,537 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:31:38,537 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:31:38,537 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:31:38,537 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:31:38,538 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:31:38,538 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:31:38,538 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:31:38,538 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:31:38,539 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:31:38,539 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:31:38,539 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:31:38,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:31:38,540 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:31:38,540 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:31:38,540 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:31:38,540 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:31:38,541 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:31:38,541 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:31:38,541 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:31:38,541 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:31:38,542 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4e0883f4fdefc9bee6f97a4f9cfd1a3af8920c2853d796abd89e2a581ffdb6b5 [2021-11-23 17:31:38,964 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:31:38,997 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:31:39,000 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:31:39,003 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:31:39,004 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:31:39,005 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/array-fpi/eqn5.c [2021-11-23 17:31:39,096 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/data/24c0a6caa/ac21894bea554b3dac762a7d432ffa32/FLAGa2b5d672f [2021-11-23 17:31:39,624 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:31:39,625 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/sv-benchmarks/c/array-fpi/eqn5.c [2021-11-23 17:31:39,632 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/data/24c0a6caa/ac21894bea554b3dac762a7d432ffa32/FLAGa2b5d672f [2021-11-23 17:31:39,992 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/data/24c0a6caa/ac21894bea554b3dac762a7d432ffa32 [2021-11-23 17:31:39,995 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:31:39,997 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:31:40,002 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:31:40,003 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:31:40,007 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:31:40,008 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:31:39" (1/1) ... [2021-11-23 17:31:40,010 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f2cb9a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:40, skipping insertion in model container [2021-11-23 17:31:40,010 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:31:39" (1/1) ... [2021-11-23 17:31:40,029 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:31:40,050 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:31:40,218 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_89862889-dc36-4862-8dcf-2dfd2fff56ea/sv-benchmarks/c/array-fpi/eqn5.c[587,600] [2021-11-23 17:31:40,243 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:31:40,257 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:31:40,272 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_89862889-dc36-4862-8dcf-2dfd2fff56ea/sv-benchmarks/c/array-fpi/eqn5.c[587,600] [2021-11-23 17:31:40,282 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:31:40,296 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:31:40,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:40 WrapperNode [2021-11-23 17:31:40,296 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:31:40,298 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:31:40,298 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:31:40,298 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:31:40,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:40" (1/1) ... [2021-11-23 17:31:40,315 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:40" (1/1) ... [2021-11-23 17:31:40,352 INFO L137 Inliner]: procedures = 18, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 78 [2021-11-23 17:31:40,353 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:31:40,354 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:31:40,354 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:31:40,354 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:31:40,363 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:40" (1/1) ... [2021-11-23 17:31:40,363 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:40" (1/1) ... [2021-11-23 17:31:40,372 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:40" (1/1) ... [2021-11-23 17:31:40,373 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:40" (1/1) ... [2021-11-23 17:31:40,383 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:40" (1/1) ... [2021-11-23 17:31:40,392 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:40" (1/1) ... [2021-11-23 17:31:40,395 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:40" (1/1) ... [2021-11-23 17:31:40,398 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:31:40,399 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:31:40,399 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:31:40,400 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:31:40,400 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:40" (1/1) ... [2021-11-23 17:31:40,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:31:40,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:31:40,431 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:31:40,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:31:40,481 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:31:40,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:31:40,482 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-23 17:31:40,482 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 17:31:40,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:31:40,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:31:40,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-23 17:31:40,602 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:31:40,604 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:31:40,979 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:31:40,986 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:31:40,986 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 17:31:40,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:31:40 BoogieIcfgContainer [2021-11-23 17:31:40,988 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:31:40,991 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:31:40,991 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:31:40,994 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:31:40,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:31:39" (1/3) ... [2021-11-23 17:31:40,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ff37595 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:31:40, skipping insertion in model container [2021-11-23 17:31:40,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:40" (2/3) ... [2021-11-23 17:31:40,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ff37595 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:31:40, skipping insertion in model container [2021-11-23 17:31:40,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:31:40" (3/3) ... [2021-11-23 17:31:40,998 INFO L111 eAbstractionObserver]: Analyzing ICFG eqn5.c [2021-11-23 17:31:41,004 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:31:41,004 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:31:41,056 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:31:41,064 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 17:31:41,064 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:31:41,079 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:41,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 17:31:41,086 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:41,087 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:31:41,088 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:31:41,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:41,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2021-11-23 17:31:41,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:41,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1569611817] [2021-11-23 17:31:41,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:41,120 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:41,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:41,127 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:41,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:31:41,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:41,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-23 17:31:41,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:41,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:41,343 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:31:41,344 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:31:41,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1569611817] [2021-11-23 17:31:41,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1569611817] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:31:41,345 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:31:41,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:31:41,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388459586] [2021-11-23 17:31:41,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:31:41,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 17:31:41,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:31:41,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 17:31:41,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 17:31:41,388 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:41,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:31:41,405 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2021-11-23 17:31:41,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 17:31:41,408 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-23 17:31:41,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:31:41,417 INFO L225 Difference]: With dead ends: 38 [2021-11-23 17:31:41,417 INFO L226 Difference]: Without dead ends: 17 [2021-11-23 17:31:41,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 17:31:41,425 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:31:41,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:31:41,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-23 17:31:41,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-23 17:31:41,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:41,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-11-23 17:31:41,473 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2021-11-23 17:31:41,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:31:41,474 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-11-23 17:31:41,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:41,475 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-11-23 17:31:41,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 17:31:41,476 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:41,476 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:31:41,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:41,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:31:41,698 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:31:41,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:41,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2021-11-23 17:31:41,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:41,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [225985716] [2021-11-23 17:31:41,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:41,700 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:41,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:41,702 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:41,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:31:41,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:41,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 17:31:41,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:42,060 INFO L354 Elim1Store]: treesize reduction 40, result has 32.2 percent of original size [2021-11-23 17:31:42,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 65 [2021-11-23 17:31:42,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:31:42,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:31:42,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 17:31:42,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:31:42,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:31:42,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 17:31:42,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:31:42,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-11-23 17:31:42,612 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 17:31:42,841 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:31:42,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 29 [2021-11-23 17:31:42,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:42,867 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:31:42,867 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:31:42,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [225985716] [2021-11-23 17:31:42,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [225985716] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:31:42,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:31:42,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:31:42,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321316064] [2021-11-23 17:31:42,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:31:42,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:31:42,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:31:42,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:31:42,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:31:42,886 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:43,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:31:43,458 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-11-23 17:31:43,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:31:43,458 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-23 17:31:43,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:31:43,468 INFO L225 Difference]: With dead ends: 34 [2021-11-23 17:31:43,468 INFO L226 Difference]: Without dead ends: 32 [2021-11-23 17:31:43,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:31:43,470 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 12 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:31:43,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 56 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 17:31:43,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-23 17:31:43,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2021-11-23 17:31:43,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:43,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-11-23 17:31:43,490 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2021-11-23 17:31:43,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:31:43,490 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-11-23 17:31:43,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:43,491 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-11-23 17:31:43,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 17:31:43,493 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:43,493 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:31:43,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:43,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:31:43,707 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:31:43,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:43,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1755224028, now seen corresponding path program 1 times [2021-11-23 17:31:43,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:43,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [719678833] [2021-11-23 17:31:43,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:43,709 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:43,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:43,712 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:43,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:31:43,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:43,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:31:43,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:44,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:44,055 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:31:44,055 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:31:44,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [719678833] [2021-11-23 17:31:44,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [719678833] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:31:44,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:31:44,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:31:44,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143492127] [2021-11-23 17:31:44,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:31:44,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 17:31:44,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:31:44,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 17:31:44,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:31:44,058 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:44,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:31:44,568 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2021-11-23 17:31:44,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 17:31:44,578 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-23 17:31:44,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:31:44,579 INFO L225 Difference]: With dead ends: 42 [2021-11-23 17:31:44,579 INFO L226 Difference]: Without dead ends: 33 [2021-11-23 17:31:44,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-11-23 17:31:44,581 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 68 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:31:44,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 25 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 17:31:44,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-23 17:31:44,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 23. [2021-11-23 17:31:44,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:44,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-11-23 17:31:44,589 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2021-11-23 17:31:44,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:31:44,590 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-11-23 17:31:44,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:44,590 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-11-23 17:31:44,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 17:31:44,591 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:44,591 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:31:44,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:44,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:31:44,804 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:31:44,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:44,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1842440164, now seen corresponding path program 1 times [2021-11-23 17:31:44,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:44,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1861601360] [2021-11-23 17:31:44,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:44,806 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:44,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:44,807 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:44,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 17:31:44,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:44,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 17:31:44,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:45,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:45,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:31:45,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:45,598 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:31:45,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1861601360] [2021-11-23 17:31:45,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1861601360] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:31:45,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [917475847] [2021-11-23 17:31:45,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:45,599 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:31:45,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:31:45,602 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:31:45,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-23 17:31:45,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:45,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:31:45,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:46,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:46,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:31:46,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:46,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [917475847] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:31:46,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401249746] [2021-11-23 17:31:46,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:46,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:31:46,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:31:46,157 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:31:46,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 17:31:46,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:46,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:31:46,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:46,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:46,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:31:46,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:46,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401249746] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:31:46,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-23 17:31:46,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 7, 8, 7, 6] total 19 [2021-11-23 17:31:46,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6419894] [2021-11-23 17:31:46,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:31:46,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:31:46,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:31:46,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:31:46,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-11-23 17:31:46,475 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:46,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:31:46,881 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2021-11-23 17:31:46,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:31:46,882 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-23 17:31:46,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:31:46,883 INFO L225 Difference]: With dead ends: 38 [2021-11-23 17:31:46,883 INFO L226 Difference]: Without dead ends: 31 [2021-11-23 17:31:46,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-11-23 17:31:46,885 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 19 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:31:46,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 31 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 17:31:46,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-23 17:31:46,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2021-11-23 17:31:46,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:46,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-11-23 17:31:46,892 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 14 [2021-11-23 17:31:46,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:31:46,893 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-11-23 17:31:46,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:46,893 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-11-23 17:31:46,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 17:31:46,894 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:46,894 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:31:46,904 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2021-11-23 17:31:47,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:47,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:47,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:31:47,498 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:31:47,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:47,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1667884396, now seen corresponding path program 1 times [2021-11-23 17:31:47,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:47,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1341963690] [2021-11-23 17:31:47,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:47,499 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:47,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:47,500 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:47,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 17:31:47,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:47,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:31:47,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:47,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:47,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:31:48,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:48,128 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:31:48,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1341963690] [2021-11-23 17:31:48,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1341963690] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:31:48,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2039072892] [2021-11-23 17:31:48,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:48,129 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:31:48,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:31:48,131 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:31:48,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-23 17:31:48,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:48,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:31:48,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:48,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:48,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:31:48,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:48,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2039072892] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:31:48,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005208089] [2021-11-23 17:31:48,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:48,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:31:48,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:31:48,737 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:31:48,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 17:31:48,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:48,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:31:48,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:49,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:49,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:31:49,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:49,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005208089] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:31:49,074 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:31:49,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7, 6, 7, 6] total 14 [2021-11-23 17:31:49,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320100320] [2021-11-23 17:31:49,074 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:31:49,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 17:31:49,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:31:49,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 17:31:49,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-11-23 17:31:49,076 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:49,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:31:49,848 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-11-23 17:31:49,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 17:31:49,855 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-23 17:31:49,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:31:49,856 INFO L225 Difference]: With dead ends: 36 [2021-11-23 17:31:49,856 INFO L226 Difference]: Without dead ends: 22 [2021-11-23 17:31:49,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2021-11-23 17:31:49,858 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 60 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:31:49,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 31 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 17:31:49,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-23 17:31:49,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2021-11-23 17:31:49,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:49,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-11-23 17:31:49,864 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2021-11-23 17:31:49,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:31:49,864 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-11-23 17:31:49,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:49,865 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-11-23 17:31:49,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 17:31:49,865 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:49,865 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:31:49,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:50,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:50,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:50,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:31:50,475 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:31:50,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:50,476 INFO L85 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2021-11-23 17:31:50,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:50,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2009320170] [2021-11-23 17:31:50,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:50,476 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:50,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:50,484 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:50,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 17:31:50,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:50,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 17:31:50,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:50,785 INFO L354 Elim1Store]: treesize reduction 40, result has 32.2 percent of original size [2021-11-23 17:31:50,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 65 [2021-11-23 17:31:50,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:31:50,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:31:50,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 17:31:50,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:31:50,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:31:50,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 17:31:50,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:31:50,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-23 17:31:50,940 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 17:31:50,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-23 17:31:51,030 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 25 treesize of output 25 [2021-11-23 17:31:51,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:31:51,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:31:51,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:31:51,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:31:51,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:31:51,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:31:51,198 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:31:51,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 43 [2021-11-23 17:31:51,310 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:31:51,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 29 [2021-11-23 17:31:51,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:51,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:31:52,524 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_170 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv1 64) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_170) |c_ULTIMATE.start_main_~b~0#1.base|))) (concat (select .cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~b~0#1.offset|)) (select .cse0 |c_ULTIMATE.start_main_~b~0#1.offset|))))) is different from false [2021-11-23 17:31:52,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-11-23 17:31:52,595 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:31:52,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2009320170] [2021-11-23 17:31:52,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2009320170] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:31:52,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [73928839] [2021-11-23 17:31:52,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:52,596 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:31:52,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:31:52,607 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:31:52,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-23 17:31:53,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:53,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 17:31:53,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:53,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-23 17:31:53,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:31:53,157 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 21 treesize of output 21 [2021-11-23 17:31:53,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:31:53,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:31:53,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 17:31:53,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 17:31:53,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:31:53,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:31:53,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:31:53,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:31:53,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:31:53,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:31:53,293 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:31:53,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 43 [2021-11-23 17:31:53,375 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:31:53,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 29 [2021-11-23 17:31:53,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:53,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:31:54,215 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_200 (Array (_ BitVec 32) (_ BitVec 32)))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_200) |c_ULTIMATE.start_main_~b~0#1.base|))) (concat (select .cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~b~0#1.offset|)) (select .cse0 |c_ULTIMATE.start_main_~b~0#1.offset|))) (_ bv1 64))) is different from false [2021-11-23 17:31:54,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-11-23 17:31:54,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [73928839] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:31:54,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577112296] [2021-11-23 17:31:54,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:54,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:31:54,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:31:54,257 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:31:54,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 17:31:54,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:54,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 17:31:54,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:54,670 INFO L354 Elim1Store]: treesize reduction 40, result has 32.2 percent of original size [2021-11-23 17:31:54,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 65 [2021-11-23 17:31:54,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:31:54,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:31:54,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 17:31:54,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:31:54,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:31:54,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 17:31:54,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-11-23 17:31:54,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:31:54,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-11-23 17:31:54,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2021-11-23 17:31:54,954 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 25 treesize of output 25 [2021-11-23 17:31:55,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:31:55,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:31:55,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:31:55,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:31:55,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:31:55,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:31:55,038 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:31:55,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 43 [2021-11-23 17:31:55,126 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:31:55,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 29 [2021-11-23 17:31:55,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:55,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:31:55,805 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_230 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv1 64) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_230) |c_ULTIMATE.start_main_~b~0#1.base|))) (concat (select .cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~b~0#1.offset|)) (select .cse0 |c_ULTIMATE.start_main_~b~0#1.offset|))))) is different from false [2021-11-23 17:31:55,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-11-23 17:31:55,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577112296] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:31:55,829 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:31:55,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 8, 7] total 15 [2021-11-23 17:31:55,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328632775] [2021-11-23 17:31:55,829 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:31:55,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 17:31:55,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:31:55,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 17:31:55,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=103, Unknown=3, NotChecked=66, Total=210 [2021-11-23 17:31:55,831 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:57,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:31:57,304 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2021-11-23 17:31:57,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 17:31:57,313 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-23 17:31:57,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:31:57,314 INFO L225 Difference]: With dead ends: 45 [2021-11-23 17:31:57,314 INFO L226 Difference]: Without dead ends: 43 [2021-11-23 17:31:57,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 72 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=78, Invalid=203, Unknown=3, NotChecked=96, Total=380 [2021-11-23 17:31:57,315 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 37 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:31:57,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 105 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 72 Invalid, 0 Unknown, 89 Unchecked, 1.2s Time] [2021-11-23 17:31:57,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-23 17:31:57,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2021-11-23 17:31:57,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:57,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-11-23 17:31:57,324 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16 [2021-11-23 17:31:57,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:31:57,324 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-11-23 17:31:57,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:57,324 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-11-23 17:31:57,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 17:31:57,325 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:57,325 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:31:57,336 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2021-11-23 17:31:57,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:57,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-23 17:31:57,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:31:57,929 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:31:57,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:57,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1267903976, now seen corresponding path program 2 times [2021-11-23 17:31:57,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:57,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [703615115] [2021-11-23 17:31:57,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:31:57,931 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:57,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:57,932 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:57,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 17:31:58,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:31:58,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:31:58,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 17:31:58,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:58,519 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:58,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:31:58,918 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:58,918 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:31:58,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [703615115] [2021-11-23 17:31:58,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [703615115] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:31:58,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [697455784] [2021-11-23 17:31:58,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:31:58,919 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:31:58,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:31:58,920 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:31:58,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-23 17:31:59,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:31:59,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:31:59,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:31:59,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:59,658 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:59,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:31:59,746 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:59,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [697455784] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:31:59,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459475912] [2021-11-23 17:31:59,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:31:59,747 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:31:59,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:31:59,747 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:31:59,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-23 17:31:59,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:31:59,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:31:59,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:31:59,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:32:00,109 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:32:00,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:32:00,196 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:32:00,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459475912] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:32:00,196 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:32:00,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 10, 8, 9, 8] total 20 [2021-11-23 17:32:00,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174995402] [2021-11-23 17:32:00,196 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:32:00,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-23 17:32:00,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:32:00,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-23 17:32:00,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-11-23 17:32:00,198 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:32:01,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:32:01,668 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2021-11-23 17:32:01,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 17:32:01,675 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-23 17:32:01,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:32:01,676 INFO L225 Difference]: With dead ends: 55 [2021-11-23 17:32:01,676 INFO L226 Difference]: Without dead ends: 46 [2021-11-23 17:32:01,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=227, Invalid=643, Unknown=0, NotChecked=0, Total=870 [2021-11-23 17:32:01,678 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 114 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:32:01,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 48 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 17:32:01,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-23 17:32:01,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 28. [2021-11-23 17:32:01,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:32:01,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-11-23 17:32:01,686 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 18 [2021-11-23 17:32:01,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:32:01,687 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-11-23 17:32:01,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:32:01,687 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-11-23 17:32:01,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 17:32:01,688 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:32:01,688 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:32:01,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-23 17:32:01,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-23 17:32:02,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-23 17:32:02,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:32:02,292 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:32:02,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:32:02,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1174519208, now seen corresponding path program 3 times [2021-11-23 17:32:02,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:32:02,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [9854685] [2021-11-23 17:32:02,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:32:02,293 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:32:02,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:32:02,294 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:32:02,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 17:32:02,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 17:32:02,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:32:02,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 17:32:02,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:32:03,059 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:32:03,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:32:03,673 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:32:03,673 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:32:03,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [9854685] [2021-11-23 17:32:03,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [9854685] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:32:03,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1799426968] [2021-11-23 17:32:03,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:32:03,674 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:32:03,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:32:03,674 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:32:03,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-23 17:32:04,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 17:32:04,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:32:04,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:32:04,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:32:04,650 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:32:04,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:32:05,063 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:32:05,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1799426968] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:32:05,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175416608] [2021-11-23 17:32:05,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:32:05,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:32:05,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:32:05,064 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:32:05,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-23 17:32:05,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 17:32:05,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:32:05,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:32:05,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:32:05,587 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:32:05,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:32:05,682 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:32:05,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175416608] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:32:05,682 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:32:05,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 10, 8, 9, 8] total 30 [2021-11-23 17:32:05,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856964642] [2021-11-23 17:32:05,683 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:32:05,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-23 17:32:05,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:32:05,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-23 17:32:05,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=626, Unknown=0, NotChecked=0, Total=870 [2021-11-23 17:32:05,685 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:32:07,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:32:07,998 INFO L93 Difference]: Finished difference Result 81 states and 90 transitions. [2021-11-23 17:32:07,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-23 17:32:07,999 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-23 17:32:07,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:32:08,000 INFO L225 Difference]: With dead ends: 81 [2021-11-23 17:32:08,000 INFO L226 Difference]: Without dead ends: 72 [2021-11-23 17:32:08,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=604, Invalid=1748, Unknown=0, NotChecked=0, Total=2352 [2021-11-23 17:32:08,003 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 242 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:32:08,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 75 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-23 17:32:08,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-23 17:32:08,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 38. [2021-11-23 17:32:08,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:32:08,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-11-23 17:32:08,013 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 18 [2021-11-23 17:32:08,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:32:08,013 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-11-23 17:32:08,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:32:08,014 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-11-23 17:32:08,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 17:32:08,014 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:32:08,014 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:32:08,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-23 17:32:08,219 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2021-11-23 17:32:08,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-23 17:32:08,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:32:08,617 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:32:08,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:32:08,617 INFO L85 PathProgramCache]: Analyzing trace with hash 798963152, now seen corresponding path program 1 times [2021-11-23 17:32:08,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:32:08,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [639354199] [2021-11-23 17:32:08,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:32:08,618 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:32:08,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:32:08,619 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:32:08,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-23 17:32:08,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:32:08,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-23 17:32:08,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:32:08,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2021-11-23 17:32:09,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:09,006 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 37 [2021-11-23 17:32:09,013 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 34 treesize of output 34 [2021-11-23 17:32:09,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:09,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:09,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 17:32:09,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:09,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:09,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 17:32:09,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:09,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:09,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:09,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:09,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:09,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:09,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:09,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:09,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:32:09,198 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-23 17:32:09,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 63 [2021-11-23 17:32:09,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:09,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:09,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:09,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:09,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:09,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:09,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:09,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:09,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:32:09,395 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-23 17:32:09,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 99 treesize of output 75 [2021-11-23 17:32:09,882 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-23 17:32:09,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 101 treesize of output 57 [2021-11-23 17:32:09,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:32:09,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:32:16,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:32:16,093 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:32:16,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [639354199] [2021-11-23 17:32:16,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [639354199] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:32:16,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [945857468] [2021-11-23 17:32:16,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:32:16,094 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:32:16,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:32:16,106 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:32:16,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-23 17:32:17,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:32:17,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-23 17:32:17,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:32:17,182 INFO L354 Elim1Store]: treesize reduction 20, result has 47.4 percent of original size [2021-11-23 17:32:17,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 75 [2021-11-23 17:32:17,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:17,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:17,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 47 [2021-11-23 17:32:17,292 INFO L354 Elim1Store]: treesize reduction 30, result has 47.4 percent of original size [2021-11-23 17:32:17,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 83 [2021-11-23 17:32:17,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:17,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2021-11-23 17:32:17,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:17,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 24 [2021-11-23 17:32:17,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:17,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:17,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 17:32:17,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:17,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-23 17:32:17,733 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 17:32:17,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 32 [2021-11-23 17:32:17,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:17,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-11-23 17:32:17,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-23 17:32:17,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:17,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:17,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:17,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:17,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:17,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:17,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:17,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:17,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:32:17,918 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-23 17:32:17,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 63 [2021-11-23 17:32:18,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:18,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:18,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:18,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:18,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:18,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:18,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:18,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:18,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:32:18,080 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-23 17:32:18,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 99 treesize of output 75 [2021-11-23 17:32:18,487 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-23 17:32:18,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 101 treesize of output 57 [2021-11-23 17:32:18,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:32:18,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:32:21,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:32:21,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [945857468] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:32:21,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135649550] [2021-11-23 17:32:21,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:32:21,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:32:21,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:32:21,717 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:32:21,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-23 17:32:21,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:32:21,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-23 17:32:21,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:32:22,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-23 17:32:22,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:22,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:22,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 25 [2021-11-23 17:32:22,379 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 25 treesize of output 25 [2021-11-23 17:32:22,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:22,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:22,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:22,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:22,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:22,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:22,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 43 [2021-11-23 17:32:22,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:22,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:22,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:22,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:23,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:23,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:23,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 71 [2021-11-23 17:32:25,661 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-23 17:32:25,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 101 treesize of output 57 [2021-11-23 17:32:25,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:32:25,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:32:35,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:32:35,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135649550] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:32:35,825 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:32:35,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8, 9, 11, 11] total 27 [2021-11-23 17:32:35,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051211348] [2021-11-23 17:32:35,826 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:32:35,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-23 17:32:35,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:32:35,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-23 17:32:35,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-11-23 17:32:35,829 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:32:40,158 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 17:32:42,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:32:42,920 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2021-11-23 17:32:42,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 17:32:42,921 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-23 17:32:42,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:32:42,922 INFO L225 Difference]: With dead ends: 45 [2021-11-23 17:32:42,922 INFO L226 Difference]: Without dead ends: 43 [2021-11-23 17:32:42,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 86 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=201, Invalid=855, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 17:32:42,924 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 40 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 24 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:32:42,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 85 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 81 Invalid, 1 Unknown, 29 Unchecked, 4.3s Time] [2021-11-23 17:32:42,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-23 17:32:42,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2021-11-23 17:32:42,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 41 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:32:42,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-11-23 17:32:42,936 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 20 [2021-11-23 17:32:42,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:32:42,936 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-11-23 17:32:42,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:32:42,937 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-11-23 17:32:42,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 17:32:42,938 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:32:42,938 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:32:42,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-23 17:32:43,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-23 17:32:43,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-23 17:32:43,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:32:43,556 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:32:43,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:32:43,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1786143722, now seen corresponding path program 4 times [2021-11-23 17:32:43,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:32:43,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [464364972] [2021-11-23 17:32:43,557 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:32:43,557 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:32:43,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:32:43,559 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:32:43,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-23 17:32:43,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:32:43,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:32:43,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 17:32:43,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:32:43,943 INFO L354 Elim1Store]: treesize reduction 40, result has 32.2 percent of original size [2021-11-23 17:32:43,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 65 [2021-11-23 17:32:43,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:43,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:43,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 17:32:43,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:43,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:43,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 17:32:44,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-11-23 17:32:44,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-23 17:32:44,171 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 25 treesize of output 25 [2021-11-23 17:32:44,219 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 25 treesize of output 25 [2021-11-23 17:32:44,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:44,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:44,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:44,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:44,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:44,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:44,330 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:32:44,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 50 [2021-11-23 17:32:44,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:44,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:44,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:44,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:44,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:44,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:44,415 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:32:44,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 43 [2021-11-23 17:32:44,517 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:32:44,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 29 [2021-11-23 17:32:44,549 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:32:44,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:32:47,326 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_510 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv1 64) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_510) |c_ULTIMATE.start_main_~b~0#1.base|))) (concat (select .cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~b~0#1.offset|)) (select .cse0 |c_ULTIMATE.start_main_~b~0#1.offset|))))) is different from false [2021-11-23 17:32:47,353 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2021-11-23 17:32:47,353 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:32:47,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [464364972] [2021-11-23 17:32:47,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [464364972] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:32:47,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [35708564] [2021-11-23 17:32:47,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:32:47,354 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:32:47,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:32:47,354 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:32:47,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-23 17:32:47,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:32:47,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:32:47,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 17:32:47,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:32:48,061 INFO L354 Elim1Store]: treesize reduction 40, result has 32.2 percent of original size [2021-11-23 17:32:48,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 65 [2021-11-23 17:32:48,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:48,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:48,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 17:32:48,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:48,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:48,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 17:32:48,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-11-23 17:32:48,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:48,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-11-23 17:32:48,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:48,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-11-23 17:32:48,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-23 17:32:48,368 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 25 treesize of output 25 [2021-11-23 17:32:48,410 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 25 treesize of output 25 [2021-11-23 17:32:48,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:48,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:48,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:48,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:48,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:48,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:48,484 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:32:48,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 50 [2021-11-23 17:32:48,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:48,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:48,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:48,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:48,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:48,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:48,544 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:32:48,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 43 [2021-11-23 17:32:48,638 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:32:48,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 29 [2021-11-23 17:32:48,652 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:32:48,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:32:49,638 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_550 (Array (_ BitVec 32) (_ BitVec 32)))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_550) |c_ULTIMATE.start_main_~b~0#1.base|))) (concat (select .cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~b~0#1.offset|)) (select .cse0 |c_ULTIMATE.start_main_~b~0#1.offset|))) (_ bv1 64))) is different from false [2021-11-23 17:32:49,671 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2021-11-23 17:32:49,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [35708564] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:32:49,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131417178] [2021-11-23 17:32:49,672 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:32:49,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:32:49,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:32:49,673 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:32:49,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-23 17:32:49,800 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:32:49,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:32:49,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-23 17:32:49,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:32:50,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-23 17:32:50,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:50,041 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 21 treesize of output 21 [2021-11-23 17:32:50,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:50,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:50,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 17:32:50,081 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 25 treesize of output 25 [2021-11-23 17:32:50,123 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 25 treesize of output 25 [2021-11-23 17:32:50,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:50,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:50,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:50,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:50,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:50,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:50,224 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:32:50,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 50 [2021-11-23 17:32:50,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:50,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:50,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:50,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:50,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:50,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:50,287 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:32:50,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 43 [2021-11-23 17:32:50,368 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:32:50,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 29 [2021-11-23 17:32:50,381 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:32:50,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:32:51,649 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_591 (Array (_ BitVec 32) (_ BitVec 32)))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_591) |c_ULTIMATE.start_main_~b~0#1.base|))) (concat (select .cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~b~0#1.offset|)) (select .cse0 |c_ULTIMATE.start_main_~b~0#1.offset|))) (_ bv1 64))) is different from false [2021-11-23 17:32:51,687 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2021-11-23 17:32:51,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131417178] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:32:51,687 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:32:51,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9, 9, 10, 9] total 19 [2021-11-23 17:32:51,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164962400] [2021-11-23 17:32:51,687 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:32:51,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 17:32:51,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:32:51,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 17:32:51,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=184, Unknown=3, NotChecked=90, Total=342 [2021-11-23 17:32:51,689 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:32:58,873 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 17:33:03,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:33:03,264 INFO L93 Difference]: Finished difference Result 85 states and 92 transitions. [2021-11-23 17:33:03,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-23 17:33:03,275 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-23 17:33:03,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:33:03,276 INFO L225 Difference]: With dead ends: 85 [2021-11-23 17:33:03,276 INFO L226 Difference]: Without dead ends: 83 [2021-11-23 17:33:03,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 91 SyntacticMatches, 9 SemanticMatches, 33 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=238, Invalid=761, Unknown=5, NotChecked=186, Total=1190 [2021-11-23 17:33:03,281 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 91 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 39 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:33:03,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 101 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 83 Invalid, 1 Unknown, 171 Unchecked, 3.3s Time] [2021-11-23 17:33:03,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-23 17:33:03,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 47. [2021-11-23 17:33:03,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:33:03,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2021-11-23 17:33:03,295 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 20 [2021-11-23 17:33:03,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:33:03,295 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2021-11-23 17:33:03,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:33:03,296 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2021-11-23 17:33:03,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 17:33:03,297 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:33:03,297 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:33:03,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-23 17:33:03,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-23 17:33:03,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-23 17:33:03,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:33:03,902 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:33:03,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:33:03,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1197174726, now seen corresponding path program 2 times [2021-11-23 17:33:03,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:33:03,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [693000213] [2021-11-23 17:33:03,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:33:03,903 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:33:03,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:33:03,904 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:33:03,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-23 17:33:04,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:33:04,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:33:04,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:33:04,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:33:04,623 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:33:04,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:33:05,437 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:33:05,437 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:33:05,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [693000213] [2021-11-23 17:33:05,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [693000213] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:33:05,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [87925950] [2021-11-23 17:33:05,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:33:05,438 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:33:05,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:33:05,442 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:33:05,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-23 17:33:06,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:33:06,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:33:06,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 17:33:06,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:33:06,334 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:33:06,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:33:06,654 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:33:06,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [87925950] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:33:06,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579653944] [2021-11-23 17:33:06,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:33:06,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:33:06,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:33:06,655 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:33:06,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-23 17:33:06,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:33:06,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:33:06,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:33:06,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:33:07,331 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:33:07,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:33:07,653 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:33:07,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579653944] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:33:07,654 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:33:07,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 11, 9, 10, 9] total 26 [2021-11-23 17:33:07,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501955828] [2021-11-23 17:33:07,655 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:33:07,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-23 17:33:07,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:33:07,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-23 17:33:07,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2021-11-23 17:33:07,657 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:33:09,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:33:09,512 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2021-11-23 17:33:09,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 17:33:09,521 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-23 17:33:09,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:33:09,522 INFO L225 Difference]: With dead ends: 65 [2021-11-23 17:33:09,522 INFO L226 Difference]: Without dead ends: 45 [2021-11-23 17:33:09,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=293, Invalid=967, Unknown=0, NotChecked=0, Total=1260 [2021-11-23 17:33:09,524 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 117 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:33:09,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 75 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-23 17:33:09,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-23 17:33:09,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2021-11-23 17:33:09,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.162162162162162) internal successors, (43), 37 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:33:09,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2021-11-23 17:33:09,534 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 24 [2021-11-23 17:33:09,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:33:09,534 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2021-11-23 17:33:09,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:33:09,535 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2021-11-23 17:33:09,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 17:33:09,536 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:33:09,536 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:33:09,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-23 17:33:09,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-23 17:33:09,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-23 17:33:10,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:33:10,141 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:33:10,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:33:10,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1232945932, now seen corresponding path program 3 times [2021-11-23 17:33:10,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:33:10,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [414880300] [2021-11-23 17:33:10,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:33:10,142 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:33:10,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:33:10,144 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:33:10,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-23 17:33:10,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 17:33:10,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:33:10,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-23 17:33:10,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:33:10,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:10,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:10,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:33:10,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:10,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:33:10,728 INFO L354 Elim1Store]: treesize reduction 33, result has 38.9 percent of original size [2021-11-23 17:33:10,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 38 [2021-11-23 17:33:10,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-23 17:33:10,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:10,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:10,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:10,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:10,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:10,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:10,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 60 [2021-11-23 17:33:11,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:11,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:11,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:11,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:11,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:11,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:11,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 53 [2021-11-23 17:33:11,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:33:11,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:11,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:11,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:11,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:11,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:11,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:11,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:33:11,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:11,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:11,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:33:11,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:11,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 104 [2021-11-23 17:33:11,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:11,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:11,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:11,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:11,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:11,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:11,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:11,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:11,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:11,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:11,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:11,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:11,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:11,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:11,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:11,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 96 [2021-11-23 17:33:13,635 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-23 17:33:13,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 100 treesize of output 56 [2021-11-23 17:33:13,713 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:33:13,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:33:32,883 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:33:32,883 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:33:32,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [414880300] [2021-11-23 17:33:32,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [414880300] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:33:32,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [599786525] [2021-11-23 17:33:32,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:33:32,884 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:33:32,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:33:32,885 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:33:32,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-23 17:33:33,660 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 17:33:33,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151764508] [2021-11-23 17:33:33,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:33:33,661 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:33:33,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:33:33,662 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:33:33,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 1 [2021-11-23 17:33:33,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-23 17:33:34,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 17:33:34,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:33:34,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-23 17:33:34,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:33:34,767 INFO L354 Elim1Store]: treesize reduction 20, result has 47.4 percent of original size [2021-11-23 17:33:34,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 75 [2021-11-23 17:33:34,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:34,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:34,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 47 [2021-11-23 17:33:34,888 INFO L354 Elim1Store]: treesize reduction 30, result has 47.4 percent of original size [2021-11-23 17:33:34,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 83 [2021-11-23 17:33:34,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:34,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2021-11-23 17:33:35,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:35,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 24 [2021-11-23 17:33:35,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:35,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:35,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 17:33:35,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:35,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 30 [2021-11-23 17:33:35,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:35,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-11-23 17:33:35,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:35,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-11-23 17:33:35,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2021-11-23 17:33:35,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:35,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:35,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:35,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:35,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:35,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:35,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:35,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:35,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:33:35,889 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-23 17:33:35,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 70 [2021-11-23 17:33:36,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:36,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:36,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:36,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:36,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:36,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:36,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:36,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:36,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:33:36,112 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-23 17:33:36,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 63 [2021-11-23 17:33:36,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:36,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:36,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:36,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:36,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:36,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:36,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:36,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:36,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:36,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:36,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:36,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:36,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:36,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:36,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:36,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:36,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:33:36,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:33:36,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:36,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:33:36,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:33:36,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:33:36,710 INFO L354 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2021-11-23 17:33:36,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 156 treesize of output 137 [2021-11-23 17:33:37,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:37,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:37,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:37,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:37,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:37,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:37,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:37,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:37,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:37,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:37,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:37,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:37,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:37,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:37,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:37,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:37,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:37,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:33:37,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:33:37,041 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-23 17:33:37,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 88 treesize of output 98 [2021-11-23 17:33:38,920 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-23 17:33:38,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 100 treesize of output 56 [2021-11-23 17:33:38,951 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:33:38,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:34:02,019 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:02,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151764508] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:34:02,020 INFO L186 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2021-11-23 17:34:02,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 11, 13] total 40 [2021-11-23 17:34:02,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828055901] [2021-11-23 17:34:02,020 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2021-11-23 17:34:02,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-23 17:34:02,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:34:02,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-23 17:34:02,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1362, Unknown=0, NotChecked=0, Total=1560 [2021-11-23 17:34:02,022 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 40 states, 40 states have (on average 1.875) internal successors, (75), 40 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:12,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:34:12,724 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2021-11-23 17:34:12,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-23 17:34:12,724 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.875) internal successors, (75), 40 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-23 17:34:12,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:34:12,726 INFO L225 Difference]: With dead ends: 62 [2021-11-23 17:34:12,726 INFO L226 Difference]: Without dead ends: 60 [2021-11-23 17:34:12,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 53.4s TimeCoverageRelationStatistics Valid=307, Invalid=2045, Unknown=0, NotChecked=0, Total=2352 [2021-11-23 17:34:12,728 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:34:12,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 86 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 137 Unchecked, 0.5s Time] [2021-11-23 17:34:12,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-23 17:34:12,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 51. [2021-11-23 17:34:12,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.16) internal successors, (58), 50 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:12,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2021-11-23 17:34:12,743 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 24 [2021-11-23 17:34:12,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:34:12,743 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2021-11-23 17:34:12,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.875) internal successors, (75), 40 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:12,744 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2021-11-23 17:34:12,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 17:34:12,745 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:34:12,746 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:34:12,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-23 17:34:12,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-23 17:34:13,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:34:13,153 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:34:13,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:34:13,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1983767408, now seen corresponding path program 5 times [2021-11-23 17:34:13,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:34:13,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1955283991] [2021-11-23 17:34:13,154 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:34:13,154 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:34:13,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:34:13,155 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:34:13,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-23 17:34:13,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-23 17:34:13,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:34:13,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 17:34:13,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:14,065 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:14,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:34:15,449 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:15,450 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:34:15,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1955283991] [2021-11-23 17:34:15,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1955283991] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:34:15,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1473948481] [2021-11-23 17:34:15,450 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:34:15,450 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:34:15,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:34:15,451 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:34:15,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-23 17:34:37,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-23 17:34:37,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:34:37,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 17:34:37,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:38,635 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:38,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:34:39,543 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:39,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1473948481] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:34:39,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165891473] [2021-11-23 17:34:39,543 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:34:39,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:34:39,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:34:39,545 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:34:39,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-23 17:34:43,578 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-23 17:34:43,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:34:43,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 17:34:43,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:44,082 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:44,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:34:44,489 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:44,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165891473] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:34:44,490 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:34:44,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13, 14, 14, 14] total 39 [2021-11-23 17:34:44,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629491506] [2021-11-23 17:34:44,490 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:34:44,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-23 17:34:44,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:34:44,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-23 17:34:44,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=1162, Unknown=0, NotChecked=0, Total=1482 [2021-11-23 17:34:44,492 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 39 states, 39 states have (on average 1.8205128205128205) internal successors, (71), 39 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:57,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:34:57,603 INFO L93 Difference]: Finished difference Result 177 states and 198 transitions. [2021-11-23 17:34:57,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-23 17:34:57,612 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8205128205128205) internal successors, (71), 39 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-23 17:34:57,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:34:57,613 INFO L225 Difference]: With dead ends: 177 [2021-11-23 17:34:57,613 INFO L226 Difference]: Without dead ends: 161 [2021-11-23 17:34:57,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 111 SyntacticMatches, 3 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2510 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=1637, Invalid=6553, Unknown=0, NotChecked=0, Total=8190 [2021-11-23 17:34:57,618 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 482 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:34:57,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [482 Valid, 245 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2021-11-23 17:34:57,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-23 17:34:57,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 71. [2021-11-23 17:34:57,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1857142857142857) internal successors, (83), 70 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:57,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2021-11-23 17:34:57,635 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 26 [2021-11-23 17:34:57,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:34:57,636 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2021-11-23 17:34:57,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.8205128205128205) internal successors, (71), 39 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:57,637 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2021-11-23 17:34:57,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 17:34:57,638 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:34:57,638 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:34:57,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-23 17:34:57,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2021-11-23 17:34:58,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-23 17:34:58,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:34:58,242 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:34:58,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:34:58,243 INFO L85 PathProgramCache]: Analyzing trace with hash -55017726, now seen corresponding path program 4 times [2021-11-23 17:34:58,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:34:58,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1852928954] [2021-11-23 17:34:58,243 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:34:58,243 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:34:58,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:34:58,245 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:34:58,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-23 17:34:58,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:34:58,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:34:58,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-23 17:34:58,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:58,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:34:58,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:34:58,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:34:58,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:34:58,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:34:58,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:34:58,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:34:58,891 INFO L354 Elim1Store]: treesize reduction 34, result has 38.2 percent of original size [2021-11-23 17:34:58,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 39 [2021-11-23 17:34:58,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-23 17:34:59,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:34:59,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:34:59,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:34:59,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:34:59,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:34:59,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:34:59,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:34:59,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:34:59,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:34:59,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:34:59,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:34:59,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:34:59,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:34:59,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:34:59,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:34:59,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:34:59,095 INFO L354 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2021-11-23 17:34:59,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 114 treesize of output 109 [2021-11-23 17:34:59,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:34:59,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:34:59,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:34:59,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:34:59,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:34:59,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:34:59,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:34:59,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:34:59,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:34:59,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:34:59,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:34:59,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:34:59,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:34:59,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:34:59,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:34:59,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:34:59,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:34:59,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:34:59,358 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-23 17:34:59,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 99 treesize of output 97 [2021-11-23 17:34:59,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:34:59,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:34:59,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:34:59,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:34:59,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:34:59,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:34:59,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:34:59,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:34:59,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:34:59,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:34:59,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:34:59,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:34:59,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:34:59,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:34:59,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:34:59,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:34:59,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:34:59,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:34:59,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:34:59,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:34:59,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:34:59,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:34:59,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:34:59,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:34:59,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:34:59,686 INFO L354 Elim1Store]: treesize reduction 133, result has 16.4 percent of original size [2021-11-23 17:34:59,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 6 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 47 case distinctions, treesize of input 245 treesize of output 183 [2021-11-23 17:35:00,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:00,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:00,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:00,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:00,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:00,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:00,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:00,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:00,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:00,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:00,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:00,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:00,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:00,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:00,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:00,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:00,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:00,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:00,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:00,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:35:00,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:35:00,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:00,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:00,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:00,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:35:00,107 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-23 17:35:00,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 211 treesize of output 143 [2021-11-23 17:35:01,339 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-11-23 17:35:01,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 215 treesize of output 107 [2021-11-23 17:35:01,430 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:01,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:51,253 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:51,253 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:35:51,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1852928954] [2021-11-23 17:35:51,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1852928954] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:51,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [802328019] [2021-11-23 17:35:51,254 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:35:51,254 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:35:51,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:35:51,255 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:35:51,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-23 17:35:53,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:35:53,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:35:53,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-23 17:35:53,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:53,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-23 17:35:53,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,218 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 37 [2021-11-23 17:35:53,223 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 34 treesize of output 34 [2021-11-23 17:35:53,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 17:35:53,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 17:35:53,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:35:53,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:35:53,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:35:53,334 INFO L354 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2021-11-23 17:35:53,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 114 treesize of output 109 [2021-11-23 17:35:53,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:35:53,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,496 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-23 17:35:53,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 99 treesize of output 97 [2021-11-23 17:35:53,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:35:53,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:35:53,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:35:53,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:35:53,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:35:53,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:35:53,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:35:53,806 INFO L354 Elim1Store]: treesize reduction 133, result has 16.4 percent of original size [2021-11-23 17:35:53,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 6 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 47 case distinctions, treesize of input 245 treesize of output 183 [2021-11-23 17:35:53,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:53,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:54,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:54,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:35:54,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:54,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:54,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:35:54,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:54,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:35:54,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:35:54,021 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-23 17:35:54,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 211 treesize of output 143 [2021-11-23 17:35:55,112 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-11-23 17:35:55,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 215 treesize of output 107 [2021-11-23 17:35:55,129 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:55,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:37:02,900 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:37:02,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [802328019] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:37:02,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799177470] [2021-11-23 17:37:02,900 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:37:02,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:37:02,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:37:02,902 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:37:02,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-23 17:37:03,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:37:03,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:37:03,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-23 17:37:03,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:37:04,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-23 17:37:04,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:37:04,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:37:04,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 25 [2021-11-23 17:37:04,569 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 25 treesize of output 25 [2021-11-23 17:37:04,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:37:04,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:37:04,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:37:04,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:37:04,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:37:04,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:37:04,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:37:04,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:37:04,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:37:04,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 73 [2021-11-23 17:37:05,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:37:05,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:37:05,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:37:05,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:37:05,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:37:05,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:37:05,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:37:05,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:37:05,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:37:05,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:37:05,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:37:05,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:37:05,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:37:05,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:37:05,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:37:05,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 16 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 81 [2021-11-23 17:37:07,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:37:07,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:37:07,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:37:07,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:37:07,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:37:07,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:37:07,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:37:07,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 108 [2021-11-23 17:37:07,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:37:07,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:37:07,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:37:07,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:37:07,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:37:07,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:37:07,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 107 [2021-11-23 17:37:15,259 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-23 17:37:15,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 160 treesize of output 92 [2021-11-23 17:37:15,281 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:37:15,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:38:45,631 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:38:45,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799177470] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:38:45,632 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:38:45,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13, 14, 14, 16] total 50 [2021-11-23 17:38:45,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7396331] [2021-11-23 17:38:45,632 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:38:45,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-23 17:38:45,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:38:45,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-23 17:38:45,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=2155, Unknown=30, NotChecked=0, Total=2450 [2021-11-23 17:38:45,635 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand has 50 states, 50 states have (on average 1.96) internal successors, (98), 50 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:39:00,803 WARN L227 SmtUtils]: Spent 7.80s on a formula simplification. DAG size of input: 152 DAG size of output: 84 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 17:40:04,135 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse19 (bvadd |c_ULTIMATE.start_main_~b~0#1.offset| (_ bv20 32))) (.cse17 (bvadd (_ bv16 32) |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse25 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse23 (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|))) (and (forall ((v_ArrVal_1019 (_ BitVec 32)) (v_ArrVal_1020 (_ BitVec 32))) (let ((.cse0 (let ((.cse6 (bvmul ((_ extract 31 0) |c_ULTIMATE.start_main_~i~0#1|) (_ bv8 32)))) (let ((.cse4 (bvadd .cse6 |c_ULTIMATE.start_main_~b~0#1.offset|))) (let ((.cse1 (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) .cse4 v_ArrVal_1019) (bvadd (_ bv4 32) .cse6 |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_1020))) (let ((.cse2 (bvmul ((_ extract 31 0) (bvadd |c_ULTIMATE.start_main_~i~0#1| (_ bv1 64))) (_ bv8 32))) (.cse3 (bvadd (concat v_ArrVal_1020 (select .cse1 .cse4)) (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse1) |c_ULTIMATE.start_main_~a~0#1.base|))) (concat (select .cse5 (bvadd (_ bv4 32) .cse6 |c_ULTIMATE.start_main_~a~0#1.offset|)) (select .cse5 (bvadd .cse6 |c_ULTIMATE.start_main_~a~0#1.offset|))))))) (store (store .cse1 (bvadd |c_ULTIMATE.start_main_~b~0#1.offset| .cse2) ((_ extract 31 0) .cse3)) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~b~0#1.offset| .cse2) ((_ extract 63 32) .cse3)))))))) (or (not (= (concat (select .cse0 (bvadd |c_ULTIMATE.start_main_~b~0#1.offset| (_ bv12 32))) (select .cse0 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~b~0#1.offset|))) (_ bv11 64))) (= (_ bv31 64) (concat (select .cse0 (bvadd |c_ULTIMATE.start_main_~b~0#1.offset| (_ bv20 32))) (select .cse0 (bvadd (_ bv16 32) |c_ULTIMATE.start_main_~b~0#1.offset|))))))) (forall ((v_ArrVal_1019 (_ BitVec 32)) (v_ArrVal_1020 (_ BitVec 32))) (let ((.cse11 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse10 (bvadd |c_ULTIMATE.start_main_~b~0#1.offset| (_ bv12 32)))) (let ((.cse12 (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) .cse11 v_ArrVal_1019) .cse10 v_ArrVal_1020))) (let ((.cse13 (bvadd (let ((.cse14 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse12) |c_ULTIMATE.start_main_~a~0#1.base|))) (concat (select .cse14 (bvadd |c_ULTIMATE.start_main_~a~0#1.offset| (_ bv12 32))) (select .cse14 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~a~0#1.offset|)))) (concat v_ArrVal_1020 (select .cse12 .cse11))))) (let ((.cse9 (bvadd (_ bv16 32) |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse7 ((_ extract 63 32) .cse13))) (let ((.cse8 (store (store .cse12 .cse9 ((_ extract 31 0) .cse13)) (bvadd |c_ULTIMATE.start_main_~b~0#1.offset| (_ bv20 32)) .cse7))) (or (= (_ bv31 64) (concat .cse7 (select .cse8 .cse9))) (not (= (concat (select .cse8 .cse10) (select .cse8 .cse11)) (_ bv11 64)))))))))) (= (_ bv31 64) (let ((.cse24 (bvadd (concat (select .cse25 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset|)) (select .cse25 |c_ULTIMATE.start_main_~a~0#1.offset|)) (concat (select .cse23 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~b~0#1.offset|)) (select .cse23 |c_ULTIMATE.start_main_~b~0#1.offset|))))) (let ((.cse22 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse21 ((_ extract 63 32) .cse24))) (let ((.cse16 (store (store .cse23 .cse22 ((_ extract 31 0) .cse24)) (bvadd |c_ULTIMATE.start_main_~b~0#1.offset| (_ bv12 32)) .cse21))) (let ((.cse18 (bvadd (let ((.cse20 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse16) |c_ULTIMATE.start_main_~a~0#1.base|))) (concat (select .cse20 (bvadd |c_ULTIMATE.start_main_~a~0#1.offset| (_ bv12 32))) (select .cse20 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~a~0#1.offset|)))) (concat .cse21 (select .cse16 .cse22))))) (let ((.cse15 ((_ extract 63 32) .cse18))) (concat .cse15 (select (store (store .cse16 .cse17 ((_ extract 31 0) .cse18)) .cse19 .cse15) .cse17)))))))) (= (_ bv31 64) (let ((.cse26 (let ((.cse34 (let ((.cse35 (bvmul ((_ extract 31 0) (bvadd |c_ULTIMATE.start_main_~i~0#1| (_ bv18446744073709551615 64))) (_ bv8 32)))) (bvadd (concat (select .cse25 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~a~0#1.offset| .cse35)) (select .cse25 (bvadd |c_ULTIMATE.start_main_~a~0#1.offset| .cse35))) (concat (select .cse23 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~b~0#1.offset| .cse35)) (select .cse23 (bvadd |c_ULTIMATE.start_main_~b~0#1.offset| .cse35)))))) (.cse33 (bvmul ((_ extract 31 0) |c_ULTIMATE.start_main_~i~0#1|) (_ bv8 32)))) (let ((.cse31 (bvadd .cse33 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse30 ((_ extract 63 32) .cse34))) (let ((.cse27 (store (store .cse23 .cse31 ((_ extract 31 0) .cse34)) (bvadd (_ bv4 32) .cse33 |c_ULTIMATE.start_main_~b~0#1.offset|) .cse30))) (let ((.cse28 (bvmul ((_ extract 31 0) (bvadd |c_ULTIMATE.start_main_~i~0#1| (_ bv1 64))) (_ bv8 32))) (.cse29 (bvadd (concat .cse30 (select .cse27 .cse31)) (let ((.cse32 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse27) |c_ULTIMATE.start_main_~a~0#1.base|))) (concat (select .cse32 (bvadd (_ bv4 32) .cse33 |c_ULTIMATE.start_main_~a~0#1.offset|)) (select .cse32 (bvadd .cse33 |c_ULTIMATE.start_main_~a~0#1.offset|))))))) (store (store .cse27 (bvadd |c_ULTIMATE.start_main_~b~0#1.offset| .cse28) ((_ extract 31 0) .cse29)) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~b~0#1.offset| .cse28) ((_ extract 63 32) .cse29)))))))) (concat (select .cse26 .cse19) (select .cse26 .cse17)))))) is different from true [2021-11-23 17:40:54,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:40:54,293 INFO L93 Difference]: Finished difference Result 96 states and 111 transitions. [2021-11-23 17:40:54,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-23 17:40:54,310 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.96) internal successors, (98), 50 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-23 17:40:54,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:40:54,311 INFO L225 Difference]: With dead ends: 96 [2021-11-23 17:40:54,311 INFO L226 Difference]: Without dead ends: 94 [2021-11-23 17:40:54,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 109 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1227 ImplicationChecksByTransitivity, 330.2s TimeCoverageRelationStatistics Valid=464, Invalid=3406, Unknown=40, NotChecked=122, Total=4032 [2021-11-23 17:40:54,313 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 30 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 304 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:40:54,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 198 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 231 Invalid, 0 Unknown, 304 Unchecked, 7.5s Time] [2021-11-23 17:40:54,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-23 17:40:54,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2021-11-23 17:40:54,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.1724137931034482) internal successors, (102), 87 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:54,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 102 transitions. [2021-11-23 17:40:54,336 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 102 transitions. Word has length 28 [2021-11-23 17:40:54,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:40:54,337 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 102 transitions. [2021-11-23 17:40:54,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.96) internal successors, (98), 50 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:54,337 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 102 transitions. [2021-11-23 17:40:54,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 17:40:54,339 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:40:54,339 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:40:54,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-23 17:40:54,557 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (36)] Ended with exit code 0 [2021-11-23 17:40:54,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-23 17:40:54,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:40:54,949 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:40:54,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:40:54,950 INFO L85 PathProgramCache]: Analyzing trace with hash 48972360, now seen corresponding path program 5 times [2021-11-23 17:40:54,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:40:54,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [620072864] [2021-11-23 17:40:54,950 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:40:54,950 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:40:54,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:40:54,951 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:40:54,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-23 17:40:55,594 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-23 17:40:55,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:40:55,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-23 17:40:55,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:40:55,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:55,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:55,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 25 [2021-11-23 17:40:55,706 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 17:40:55,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2021-11-23 17:40:55,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:55,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-11-23 17:40:55,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-23 17:40:55,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:55,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:55,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:55,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:55,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:55,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:55,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 48 [2021-11-23 17:40:55,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:55,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:56,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:56,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:56,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:56,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:56,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 48 [2021-11-23 17:40:56,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:56,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:56,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:56,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:56,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:56,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:56,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 41 [2021-11-23 17:40:56,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:40:56,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:56,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:56,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:56,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:56,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:56,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:40:56,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:56,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:56,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:56,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 101 [2021-11-23 17:40:56,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:56,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:56,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:56,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:56,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:56,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:56,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:56,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:56,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:56,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:56,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:56,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:56,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:56,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:56,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:56,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 100 [2021-11-23 17:40:56,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:56,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:56,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:56,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:56,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:56,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:56,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:56,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:56,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:56,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:56,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:56,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:56,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:56,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:56,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:40:56,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 93 [2021-11-23 17:40:59,220 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-23 17:40:59,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 108 treesize of output 56 [2021-11-23 17:40:59,336 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:40:59,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:41:40,708 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:41:40,709 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:41:40,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [620072864] [2021-11-23 17:41:40,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [620072864] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:41:40,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1236350211] [2021-11-23 17:41:40,710 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:41:40,710 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:41:40,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:41:40,725 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:41:40,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-11-23 17:42:46,181 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-23 17:42:46,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:42:46,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-23 17:42:46,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:42:46,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:46,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:46,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 25 [2021-11-23 17:42:46,363 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 17:42:46,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2021-11-23 17:42:46,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:46,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-11-23 17:42:46,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-23 17:42:46,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:46,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:46,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:46,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:46,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:46,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:46,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 48 [2021-11-23 17:42:46,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:46,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:46,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:46,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:46,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:46,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:46,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 48 [2021-11-23 17:42:46,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:46,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:46,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:46,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:46,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:46,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:46,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 41 [2021-11-23 17:42:46,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:42:46,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:46,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:46,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:46,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:46,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:46,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:42:46,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:46,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:46,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:46,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 101 [2021-11-23 17:42:47,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:47,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:47,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:47,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:47,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:47,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:47,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:47,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:47,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:47,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:47,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:47,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:47,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:47,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:47,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:47,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 100 [2021-11-23 17:42:47,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:47,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:47,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:47,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:47,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:47,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:47,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:47,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:47,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:47,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:47,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:47,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:47,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:47,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:47,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:42:47,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 93 [2021-11-23 17:42:48,776 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-23 17:42:48,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 108 treesize of output 56 [2021-11-23 17:42:48,798 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:42:48,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:43:14,075 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:43:14,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1236350211] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:43:14,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370028381] [2021-11-23 17:43:14,075 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:43:14,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:43:14,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:43:14,077 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:43:14,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-23 17:43:20,750 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-23 17:43:20,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:43:20,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-23 17:43:20,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:43:20,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-23 17:43:20,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:20,841 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 36 [2021-11-23 17:43:20,847 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 33 treesize of output 33 [2021-11-23 17:43:20,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:20,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 18 [2021-11-23 17:43:20,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:20,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:20,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 17:43:21,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:21,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:21,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:21,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:21,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:21,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:21,058 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 17:43:21,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 58 [2021-11-23 17:43:21,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:21,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:21,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:21,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:21,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:21,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:21,237 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 17:43:21,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 58 [2021-11-23 17:43:21,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:21,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:21,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:21,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:21,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:21,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:21,419 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 17:43:21,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 51 [2021-11-23 17:43:22,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:22,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:22,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:22,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:22,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:22,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:22,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:22,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:22,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:22,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:22,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:22,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:22,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:22,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:43:22,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:22,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:43:22,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:22,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:43:22,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:43:22,116 INFO L354 Elim1Store]: treesize reduction 57, result has 1.7 percent of original size [2021-11-23 17:43:22,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 147 treesize of output 125 [2021-11-23 17:43:22,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:22,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:22,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:22,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:22,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:22,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:22,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:22,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:22,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:22,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:22,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:22,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:22,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:22,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:22,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:22,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:22,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:22,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:43:22,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:43:22,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:22,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:22,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:22,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:22,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:22,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:43:22,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:43:22,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:22,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:22,835 INFO L354 Elim1Store]: treesize reduction 57, result has 1.7 percent of original size [2021-11-23 17:43:22,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 176 treesize of output 160 [2021-11-23 17:43:23,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:23,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:23,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:23,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:23,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:23,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:23,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:23,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:23,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:23,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:23,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:23,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:23,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:23,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:23,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:23,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:43:23,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:23,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:43:23,142 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-23 17:43:23,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 108 treesize of output 96 [2021-11-23 17:43:26,801 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-23 17:43:26,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 108 treesize of output 56 [2021-11-23 17:43:26,830 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:43:26,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:43:51,315 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:43:51,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370028381] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:43:51,315 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:43:51,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 15, 19, 15, 19] total 42 [2021-11-23 17:43:51,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681844183] [2021-11-23 17:43:51,316 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:43:51,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-23 17:43:51,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:43:51,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-23 17:43:51,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1482, Unknown=5, NotChecked=0, Total=1722 [2021-11-23 17:43:51,318 INFO L87 Difference]: Start difference. First operand 88 states and 102 transitions. Second operand has 42 states, 42 states have (on average 1.6666666666666667) internal successors, (70), 42 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:44:04,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:44:04,109 INFO L93 Difference]: Finished difference Result 124 states and 142 transitions. [2021-11-23 17:44:04,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-23 17:44:04,123 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.6666666666666667) internal successors, (70), 42 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-23 17:44:04,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:44:04,125 INFO L225 Difference]: With dead ends: 124 [2021-11-23 17:44:04,125 INFO L226 Difference]: Without dead ends: 122 [2021-11-23 17:44:04,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 107 SyntacticMatches, 16 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 102.4s TimeCoverageRelationStatistics Valid=316, Invalid=2031, Unknown=5, NotChecked=0, Total=2352 [2021-11-23 17:44:04,127 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 22 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:44:04,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 119 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 75 Invalid, 0 Unknown, 160 Unchecked, 1.7s Time] [2021-11-23 17:44:04,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-23 17:44:04,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 92. [2021-11-23 17:44:04,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.1868131868131868) internal successors, (108), 91 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:44:04,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 108 transitions. [2021-11-23 17:44:04,152 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 108 transitions. Word has length 28 [2021-11-23 17:44:04,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:44:04,153 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 108 transitions. [2021-11-23 17:44:04,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.6666666666666667) internal successors, (70), 42 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:44:04,153 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 108 transitions. [2021-11-23 17:44:04,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 17:44:04,155 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:44:04,155 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:44:04,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2021-11-23 17:44:04,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-11-23 17:44:04,613 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-11-23 17:44:04,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:44:04,781 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:44:04,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:44:04,781 INFO L85 PathProgramCache]: Analyzing trace with hash 778799246, now seen corresponding path program 6 times [2021-11-23 17:44:04,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:44:04,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1638730419] [2021-11-23 17:44:04,782 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 17:44:04,782 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:44:04,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:44:04,783 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:44:04,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-23 17:44:05,500 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-23 17:44:05,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:44:05,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-23 17:44:05,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:44:05,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-23 17:44:05,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:05,570 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 21 treesize of output 21 [2021-11-23 17:44:05,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:05,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:05,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 17:44:05,623 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 25 treesize of output 25 [2021-11-23 17:44:05,676 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 25 treesize of output 25 [2021-11-23 17:44:05,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 17:44:05,761 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 25 treesize of output 25 [2021-11-23 17:44:05,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:05,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:05,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:05,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:05,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:05,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:05,888 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:44:05,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 50 [2021-11-23 17:44:05,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:05,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:05,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:05,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:05,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:05,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:05,979 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:44:05,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 50 [2021-11-23 17:44:06,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:06,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:06,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:06,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:06,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:06,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:06,073 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:44:06,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 50 [2021-11-23 17:44:06,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:06,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:06,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:06,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:06,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:06,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:06,183 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:44:06,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 43 [2021-11-23 17:44:06,298 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:44:06,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 29 [2021-11-23 17:44:06,330 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 17:44:06,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:44:11,392 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1244 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv1 64) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_1244) |c_ULTIMATE.start_main_~b~0#1.base|))) (concat (select .cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~b~0#1.offset|)) (select .cse0 |c_ULTIMATE.start_main_~b~0#1.offset|))))) is different from false [2021-11-23 17:44:11,445 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 7 not checked. [2021-11-23 17:44:11,445 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:44:11,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1638730419] [2021-11-23 17:44:11,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1638730419] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:44:11,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2082058062] [2021-11-23 17:44:11,446 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 17:44:11,446 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:44:11,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:44:11,447 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:44:11,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2021-11-23 17:44:12,650 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 17:44:12,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078017947] [2021-11-23 17:44:12,651 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 17:44:12,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:44:12,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:44:12,652 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:44:12,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 1 [2021-11-23 17:44:12,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-23 17:44:15,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-23 17:44:15,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:44:15,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-23 17:44:15,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:44:15,375 INFO L354 Elim1Store]: treesize reduction 40, result has 32.2 percent of original size [2021-11-23 17:44:15,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 65 [2021-11-23 17:44:15,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:15,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:15,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 17:44:15,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:15,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:15,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 17:44:15,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:15,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-11-23 17:44:15,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:15,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-11-23 17:44:15,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-23 17:44:15,670 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 25 treesize of output 25 [2021-11-23 17:44:15,791 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 25 treesize of output 25 [2021-11-23 17:44:15,912 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 25 treesize of output 25 [2021-11-23 17:44:15,967 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 25 treesize of output 25 [2021-11-23 17:44:16,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:16,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:16,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:16,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:16,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:16,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:16,051 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:44:16,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 50 [2021-11-23 17:44:16,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:16,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:16,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:16,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:16,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:16,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:16,106 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:44:16,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 50 [2021-11-23 17:44:16,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:16,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:16,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:16,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:16,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:16,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:16,164 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:44:16,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 50 [2021-11-23 17:44:16,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:16,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:16,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:16,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:16,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:16,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:16,216 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:44:16,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 43 [2021-11-23 17:44:16,289 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:44:16,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 29 [2021-11-23 17:44:16,300 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:44:16,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:44:18,968 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1343 (Array (_ BitVec 32) (_ BitVec 32)))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_1343) |c_ULTIMATE.start_main_~b~0#1.base|))) (concat (select .cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~b~0#1.offset|)) (select .cse0 |c_ULTIMATE.start_main_~b~0#1.offset|))) (_ bv1 64))) is different from false [2021-11-23 17:44:19,041 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 7 not checked. [2021-11-23 17:44:19,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078017947] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:44:19,041 INFO L186 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2021-11-23 17:44:19,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 14, 13] total 26 [2021-11-23 17:44:19,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844268104] [2021-11-23 17:44:19,042 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2021-11-23 17:44:19,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-23 17:44:19,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:44:19,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-23 17:44:19,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=408, Unknown=2, NotChecked=90, Total=650 [2021-11-23 17:44:19,043 INFO L87 Difference]: Start difference. First operand 92 states and 108 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:44:26,280 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 17:44:30,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:44:30,353 INFO L93 Difference]: Finished difference Result 137 states and 158 transitions. [2021-11-23 17:44:30,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-23 17:44:30,367 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-23 17:44:30,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:44:30,368 INFO L225 Difference]: With dead ends: 137 [2021-11-23 17:44:30,369 INFO L226 Difference]: Without dead ends: 135 [2021-11-23 17:44:30,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 79 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=245, Invalid=816, Unknown=3, NotChecked=126, Total=1190 [2021-11-23 17:44:30,370 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 68 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 15 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 205 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:44:30,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 64 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 130 Invalid, 1 Unknown, 205 Unchecked, 4.3s Time] [2021-11-23 17:44:30,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-23 17:44:30,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 100. [2021-11-23 17:44:30,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.2121212121212122) internal successors, (120), 99 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:44:30,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 120 transitions. [2021-11-23 17:44:30,396 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 120 transitions. Word has length 28 [2021-11-23 17:44:30,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:44:30,397 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 120 transitions. [2021-11-23 17:44:30,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:44:30,397 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 120 transitions. [2021-11-23 17:44:30,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-23 17:44:30,398 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:44:30,399 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:44:30,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-23 17:44:30,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-11-23 17:44:30,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:44:30,805 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:44:30,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:44:30,805 INFO L85 PathProgramCache]: Analyzing trace with hash -412561416, now seen corresponding path program 6 times [2021-11-23 17:44:30,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:44:30,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1387646132] [2021-11-23 17:44:30,806 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 17:44:30,806 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:44:30,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:44:30,806 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:44:30,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-23 17:44:31,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-23 17:44:31,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:44:31,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 17:44:31,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:44:32,070 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 17:44:32,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:44:32,788 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 17:44:32,789 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:44:32,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1387646132] [2021-11-23 17:44:32,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1387646132] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:44:32,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [408144300] [2021-11-23 17:44:32,789 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 17:44:32,789 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:44:32,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:44:32,790 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:44:32,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2021-11-23 17:44:33,807 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-23 17:44:33,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:44:33,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 17:44:33,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:44:34,230 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 17:44:34,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:44:34,518 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 17:44:34,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [408144300] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:44:34,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034088098] [2021-11-23 17:44:34,518 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 17:44:34,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:44:34,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:44:34,524 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:44:34,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-23 17:44:35,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-23 17:44:35,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:44:35,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 17:44:35,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:44:35,389 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 17:44:35,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:44:35,589 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 17:44:35,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034088098] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:44:35,590 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:44:35,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 12, 10, 12, 10] total 20 [2021-11-23 17:44:35,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373338025] [2021-11-23 17:44:35,590 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:44:35,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-23 17:44:35,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:44:35,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-23 17:44:35,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-11-23 17:44:35,592 INFO L87 Difference]: Start difference. First operand 100 states and 120 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:44:38,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:44:38,407 INFO L93 Difference]: Finished difference Result 152 states and 172 transitions. [2021-11-23 17:44:38,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 17:44:38,419 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-23 17:44:38,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:44:38,420 INFO L225 Difference]: With dead ends: 152 [2021-11-23 17:44:38,420 INFO L226 Difference]: Without dead ends: 126 [2021-11-23 17:44:38,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=228, Invalid=764, Unknown=0, NotChecked=0, Total=992 [2021-11-23 17:44:38,422 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 156 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:44:38,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 123 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-23 17:44:38,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-23 17:44:38,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 107. [2021-11-23 17:44:38,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.1886792452830188) internal successors, (126), 106 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:44:38,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 126 transitions. [2021-11-23 17:44:38,450 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 126 transitions. Word has length 32 [2021-11-23 17:44:38,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:44:38,450 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 126 transitions. [2021-11-23 17:44:38,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:44:38,451 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 126 transitions. [2021-11-23 17:44:38,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-23 17:44:38,452 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:44:38,452 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:44:38,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-11-23 17:44:38,670 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (45)] Ended with exit code 0 [2021-11-23 17:44:38,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-23 17:44:39,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:44:39,065 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:44:39,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:44:39,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1146912830, now seen corresponding path program 7 times [2021-11-23 17:44:39,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:44:39,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1157262565] [2021-11-23 17:44:39,066 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 17:44:39,066 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:44:39,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:44:39,067 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:44:39,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89862889-dc36-4862-8dcf-2dfd2fff56ea/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-11-23 17:44:39,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:44:39,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-23 17:44:39,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:44:39,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:39,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:39,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:39,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:39,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:39,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:39,826 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:44:39,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 65 [2021-11-23 17:44:40,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:40,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:40,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:40,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:40,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:40,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:40,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:40,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:40,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:40,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:40,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:40,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:40,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:40,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:40,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:40,067 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:44:40,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 76 [2021-11-23 17:44:40,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:40,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:40,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:40,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:40,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:40,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:40,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:40,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:40,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:40,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:40,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:40,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:40,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:40,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:40,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:40,259 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:44:40,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 69 [2021-11-23 17:44:40,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:40,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:40,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:40,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:40,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:40,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:40,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:40,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:44:40,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:40,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:40,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:44:40,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:40,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:40,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:44:40,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:44:40,673 INFO L354 Elim1Store]: treesize reduction 65, result has 34.3 percent of original size [2021-11-23 17:44:40,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 213 treesize of output 147 [2021-11-23 17:44:41,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:41,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:41,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:41,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:41,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:41,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:41,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:41,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:41,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:41,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:41,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:41,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:41,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:41,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:41,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:41,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:41,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:41,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:41,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:41,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:41,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:41,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:41,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:41,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:41,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:41,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:44:41,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:41,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:41,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:44:41,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:41,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:41,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:41,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:44:41,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:41,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:44:41,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:41,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:41,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:41,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:41,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:41,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:41,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:44:41,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:44:41,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:44:41,408 INFO L354 Elim1Store]: treesize reduction 92, result has 1.1 percent of original size [2021-11-23 17:44:41,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 15 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 242 treesize of output 201 [2021-11-23 17:44:42,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:42,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:42,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:42,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:42,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:42,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:42,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:42,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:42,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:42,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:42,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:42,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:42,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:42,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:42,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:42,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:42,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:42,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:42,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:42,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:42,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:42,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:42,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:42,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:42,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:42,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:44:42,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:42,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:44:42,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:42,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:42,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:42,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:42,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:42,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:42,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:42,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:42,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:42,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:44:42,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:44:42,890 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-23 17:44:42,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 207 treesize of output 163 [2021-11-23 17:44:55,850 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-11-23 17:44:55,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 261 treesize of output 105 [2021-11-23 17:44:56,077 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:44:56,078 INFO L328 TraceCheckSpWp]: Computing backward predicates...