./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/pr2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-tiling/pr2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI --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 5922a5be589e27d89439744489152c928c7510f0140c8b0fb4d1faadee969752 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 01:52:18,141 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:52:18,144 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:52:18,213 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:52:18,214 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:52:18,219 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:52:18,222 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:52:18,227 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:52:18,229 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:52:18,236 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:52:18,238 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:52:18,241 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:52:18,241 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:52:18,244 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:52:18,246 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:52:18,249 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:52:18,251 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:52:18,253 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:52:18,257 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:52:18,270 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:52:18,272 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:52:18,274 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:52:18,278 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:52:18,280 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:52:18,290 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:52:18,292 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:52:18,292 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:52:18,294 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:52:18,295 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:52:18,297 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:52:18,297 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:52:18,299 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:52:18,301 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:52:18,302 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:52:18,305 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:52:18,306 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:52:18,307 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:52:18,307 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:52:18,307 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:52:18,308 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:52:18,309 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:52:18,310 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 01:52:18,358 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:52:18,358 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:52:18,359 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:52:18,359 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:52:18,360 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:52:18,361 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:52:18,361 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:52:18,361 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:52:18,362 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:52:18,362 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:52:18,363 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:52:18,363 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:52:18,364 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:52:18,364 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:52:18,364 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:52:18,364 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:52:18,365 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:52:18,365 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:52:18,366 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:52:18,366 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:52:18,366 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:52:18,367 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:52:18,367 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:52:18,369 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:52:18,369 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:52:18,369 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:52:18,370 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:52:18,370 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:52:18,370 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:52:18,370 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:52:18,371 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:52:18,371 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:52:18,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:52:18,372 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:52:18,372 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:52:18,372 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:52:18,373 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:52:18,373 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:52:18,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:52:18,373 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:52:18,374 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:52:18,374 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5922a5be589e27d89439744489152c928c7510f0140c8b0fb4d1faadee969752 [2022-11-03 01:52:18,764 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:52:18,800 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:52:18,803 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:52:18,805 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:52:18,806 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:52:18,807 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/array-tiling/pr2.c [2022-11-03 01:52:18,897 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/data/a09af2f37/202ad16e2c954299a7e9abd380834ea0/FLAG60e1093ec [2022-11-03 01:52:19,542 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:52:19,545 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/sv-benchmarks/c/array-tiling/pr2.c [2022-11-03 01:52:19,555 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/data/a09af2f37/202ad16e2c954299a7e9abd380834ea0/FLAG60e1093ec [2022-11-03 01:52:19,875 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/data/a09af2f37/202ad16e2c954299a7e9abd380834ea0 [2022-11-03 01:52:19,878 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:52:19,890 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:52:19,892 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:52:19,892 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:52:19,896 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:52:19,897 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:52:19" (1/1) ... [2022-11-03 01:52:19,899 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fa888cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:52:19, skipping insertion in model container [2022-11-03 01:52:19,899 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:52:19" (1/1) ... [2022-11-03 01:52:19,908 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:52:19,925 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:52:20,149 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_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/sv-benchmarks/c/array-tiling/pr2.c[394,407] [2022-11-03 01:52:20,170 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:52:20,180 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:52:20,196 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_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/sv-benchmarks/c/array-tiling/pr2.c[394,407] [2022-11-03 01:52:20,206 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:52:20,223 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:52:20,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:52:20 WrapperNode [2022-11-03 01:52:20,223 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:52:20,225 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:52:20,225 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:52:20,225 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:52:20,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:52:20" (1/1) ... [2022-11-03 01:52:20,243 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:52:20" (1/1) ... [2022-11-03 01:52:20,267 INFO L138 Inliner]: procedures = 15, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 75 [2022-11-03 01:52:20,268 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:52:20,269 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:52:20,269 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:52:20,269 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:52:20,281 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:52:20" (1/1) ... [2022-11-03 01:52:20,281 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:52:20" (1/1) ... [2022-11-03 01:52:20,284 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:52:20" (1/1) ... [2022-11-03 01:52:20,284 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:52:20" (1/1) ... [2022-11-03 01:52:20,291 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:52:20" (1/1) ... [2022-11-03 01:52:20,296 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:52:20" (1/1) ... [2022-11-03 01:52:20,297 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:52:20" (1/1) ... [2022-11-03 01:52:20,299 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:52:20" (1/1) ... [2022-11-03 01:52:20,301 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:52:20,302 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:52:20,302 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:52:20,302 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:52:20,304 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:52:20" (1/1) ... [2022-11-03 01:52:20,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:52:20,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:52:20,356 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:52:20,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:52:20,406 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:52:20,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:52:20,407 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 01:52:20,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 01:52:20,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:52:20,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:52:20,408 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 01:52:20,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 01:52:20,519 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:52:20,522 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:52:20,817 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:52:20,889 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:52:20,890 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-03 01:52:20,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:52:20 BoogieIcfgContainer [2022-11-03 01:52:20,893 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:52:20,896 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:52:20,896 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:52:20,901 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:52:20,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:52:19" (1/3) ... [2022-11-03 01:52:20,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d96c67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:52:20, skipping insertion in model container [2022-11-03 01:52:20,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:52:20" (2/3) ... [2022-11-03 01:52:20,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d96c67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:52:20, skipping insertion in model container [2022-11-03 01:52:20,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:52:20" (3/3) ... [2022-11-03 01:52:20,905 INFO L112 eAbstractionObserver]: Analyzing ICFG pr2.c [2022-11-03 01:52:20,928 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:52:20,928 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:52:21,017 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:52:21,026 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@39f1da62, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:52:21,026 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:52:21,032 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:21,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-03 01:52:21,041 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:21,042 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:52:21,043 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:21,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:21,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1729011113, now seen corresponding path program 1 times [2022-11-03 01:52:21,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:52:21,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124221467] [2022-11-03 01:52:21,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:21,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:52:21,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:21,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:21,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:52:21,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124221467] [2022-11-03 01:52:21,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124221467] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:21,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:21,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:52:21,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378362005] [2022-11-03 01:52:21,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:21,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:52:21,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:52:21,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:52:21,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:52:21,889 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2022-11-03 01:52:21,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:21,998 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2022-11-03 01:52:22,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:52:22,002 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-03 01:52:22,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:22,014 INFO L225 Difference]: With dead ends: 24 [2022-11-03 01:52:22,014 INFO L226 Difference]: Without dead ends: 10 [2022-11-03 01:52:22,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:52:22,033 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 12 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:22,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 12 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:52:22,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-11-03 01:52:22,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-11-03 01:52:22,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:22,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2022-11-03 01:52:22,093 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 7 [2022-11-03 01:52:22,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:22,094 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2022-11-03 01:52:22,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2022-11-03 01:52:22,096 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2022-11-03 01:52:22,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-03 01:52:22,097 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:22,097 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:52:22,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:52:22,098 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:22,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:22,101 INFO L85 PathProgramCache]: Analyzing trace with hash 2067009799, now seen corresponding path program 1 times [2022-11-03 01:52:22,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:52:22,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202431957] [2022-11-03 01:52:22,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:22,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:52:22,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:23,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:23,177 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:52:23,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202431957] [2022-11-03 01:52:23,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202431957] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:52:23,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484210686] [2022-11-03 01:52:23,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:23,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:52:23,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:52:23,181 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:52:23,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 01:52:23,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:23,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 01:52:23,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:23,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:23,497 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 39 [2022-11-03 01:52:23,701 INFO L390 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 90 [2022-11-03 01:52:23,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:23,736 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 77 [2022-11-03 01:52:23,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:23,759 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 16 treesize of output 20 [2022-11-03 01:52:23,790 INFO L390 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 5 treesize of output 3 [2022-11-03 01:52:23,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:23,876 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 23 treesize of output 12 [2022-11-03 01:52:23,917 INFO L390 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 0 case distinctions, treesize of input 14 treesize of output 11 [2022-11-03 01:52:23,923 INFO L390 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 5 treesize of output 3 [2022-11-03 01:52:23,959 INFO L390 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 0 case distinctions, treesize of input 14 treesize of output 11 [2022-11-03 01:52:23,971 INFO L390 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 5 treesize of output 3 [2022-11-03 01:52:24,229 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 45 [2022-11-03 01:52:24,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:24,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:52:24,473 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:52:24,474 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-11-03 01:52:24,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:52:24,661 INFO L356 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-03 01:52:24,662 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 92 [2022-11-03 01:52:24,695 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2022-11-03 01:52:24,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:24,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484210686] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:52:24,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1448243274] [2022-11-03 01:52:24,748 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 01:52:24,749 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:52:24,754 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:52:24,761 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:52:24,762 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:52:24,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:24,854 INFO L356 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2022-11-03 01:52:24,855 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 40 [2022-11-03 01:52:24,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:24,950 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 01:52:24,951 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 01:52:25,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:25,064 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 185 [2022-11-03 01:52:25,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:25,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:25,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:25,204 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 301 treesize of output 343 [2022-11-03 01:52:25,237 INFO L390 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 198 treesize of output 191 [2022-11-03 01:52:25,264 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 205 treesize of output 209 [2022-11-03 01:52:25,302 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 207 treesize of output 211 [2022-11-03 01:52:25,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:25,368 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-11-03 01:52:25,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:25,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:25,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:25,588 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 318 treesize of output 360 [2022-11-03 01:52:25,603 INFO L390 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 10 treesize of output 3 [2022-11-03 01:52:25,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:25,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:25,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:25,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:25,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:25,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:25,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:25,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:25,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:25,839 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 83 [2022-11-03 01:52:25,860 INFO L390 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 10 treesize of output 3 [2022-11-03 01:52:26,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:26,202 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-03 01:52:26,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:26,239 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 136 [2022-11-03 01:52:26,264 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 01:52:26,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:26,280 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 14 [2022-11-03 01:52:26,320 INFO L390 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 21 treesize of output 7 [2022-11-03 01:52:26,332 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 119 [2022-11-03 01:52:26,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:26,357 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-11-03 01:52:26,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:26,382 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 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 86 treesize of output 68 [2022-11-03 01:52:26,412 INFO L390 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 68 [2022-11-03 01:52:26,479 INFO L390 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 21 treesize of output 7 [2022-11-03 01:52:26,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:26,513 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 16 [2022-11-03 01:52:26,654 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:52:27,891 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '120#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#volArray~0#1.base|) (+ |ULTIMATE.start_main_~#volArray~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite |ULTIMATE.start_main_#t~short9#1| 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (not (= |ULTIMATE.start_main_#t~mem8#1| 0)) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#volArray~0#1.base|) (+ |ULTIMATE.start_main_~#volArray~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (not (<= |ULTIMATE.start_main_~MINVAL~0#1| |ULTIMATE.start_main_#t~mem7#1|)) (= |#NULL.base| 0))' at error location [2022-11-03 01:52:27,891 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:52:27,892 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:52:27,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 15 [2022-11-03 01:52:27,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845967771] [2022-11-03 01:52:27,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:52:27,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-03 01:52:27,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:52:27,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-03 01:52:27,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-11-03 01:52:27,896 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 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) [2022-11-03 01:52:28,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:28,651 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2022-11-03 01:52:28,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 01:52:28,652 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-03 01:52:28,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:28,652 INFO L225 Difference]: With dead ends: 20 [2022-11-03 01:52:28,652 INFO L226 Difference]: Without dead ends: 18 [2022-11-03 01:52:28,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=152, Invalid=604, Unknown=0, NotChecked=0, Total=756 [2022-11-03 01:52:28,655 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 42 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:28,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 14 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:52:28,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-03 01:52:28,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 12. [2022-11-03 01:52:28,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 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) [2022-11-03 01:52:28,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2022-11-03 01:52:28,662 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2022-11-03 01:52:28,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:28,662 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2022-11-03 01:52:28,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 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) [2022-11-03 01:52:28,663 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2022-11-03 01:52:28,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 01:52:28,664 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:28,664 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:52:28,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:28,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:52:28,884 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:28,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:28,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1348076108, now seen corresponding path program 1 times [2022-11-03 01:52:28,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:52:28,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795244808] [2022-11-03 01:52:28,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:28,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:52:28,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:29,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:29,524 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:52:29,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795244808] [2022-11-03 01:52:29,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795244808] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:52:29,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038406384] [2022-11-03 01:52:29,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:29,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:52:29,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:52:29,527 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:52:29,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 01:52:29,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:29,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 01:52:29,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:29,703 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 43 [2022-11-03 01:52:29,769 INFO L390 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 0 case distinctions, treesize of input 18 treesize of output 7 [2022-11-03 01:52:29,789 INFO L390 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 7 treesize of output 3 [2022-11-03 01:52:29,981 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 37 [2022-11-03 01:52:30,045 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:30,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:52:30,196 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:52:30,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-11-03 01:52:30,249 INFO L356 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-03 01:52:30,250 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2022-11-03 01:52:30,261 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2022-11-03 01:52:30,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:30,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038406384] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:52:30,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2111514710] [2022-11-03 01:52:30,291 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:52:30,298 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:52:30,299 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:52:30,299 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:52:30,299 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:52:30,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:30,370 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 01:52:30,371 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 01:52:30,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:30,388 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 24 treesize of output 32 [2022-11-03 01:52:30,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:30,458 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 185 [2022-11-03 01:52:30,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:30,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:30,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:30,601 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 336 treesize of output 368 [2022-11-03 01:52:30,633 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 254 treesize of output 258 [2022-11-03 01:52:30,663 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 256 treesize of output 260 [2022-11-03 01:52:30,691 INFO L390 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 244 treesize of output 237 [2022-11-03 01:52:30,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:30,730 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-11-03 01:52:30,802 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 01:52:30,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:30,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:30,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:30,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:30,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:30,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:30,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:30,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:30,842 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 65 [2022-11-03 01:52:30,868 INFO L390 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 10 treesize of output 3 [2022-11-03 01:52:30,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:30,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:30,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:30,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:30,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:30,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:30,933 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 39 [2022-11-03 01:52:30,968 INFO L390 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 10 treesize of output 3 [2022-11-03 01:52:31,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:31,108 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 102 [2022-11-03 01:52:31,122 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 62 treesize of output 19 [2022-11-03 01:52:31,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:31,248 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-03 01:52:31,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:31,290 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 136 [2022-11-03 01:52:31,359 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 01:52:31,377 INFO L390 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 21 treesize of output 7 [2022-11-03 01:52:31,395 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 119 [2022-11-03 01:52:31,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:31,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-11-03 01:52:31,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:31,472 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 16 [2022-11-03 01:52:31,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:31,507 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 16 [2022-11-03 01:52:31,549 INFO L390 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 0 case distinctions, treesize of input 33 treesize of output 21 [2022-11-03 01:52:31,559 INFO L390 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 21 treesize of output 7 [2022-11-03 01:52:31,583 INFO L390 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 60 [2022-11-03 01:52:31,923 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:52:32,746 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '259#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:52:32,746 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:52:32,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:52:32,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2022-11-03 01:52:32,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792413683] [2022-11-03 01:52:32,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:52:32,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-03 01:52:32,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:52:32,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-03 01:52:32,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2022-11-03 01:52:32,749 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 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) [2022-11-03 01:52:33,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:33,221 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2022-11-03 01:52:33,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 01:52:33,222 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 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 11 [2022-11-03 01:52:33,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:33,222 INFO L225 Difference]: With dead ends: 19 [2022-11-03 01:52:33,222 INFO L226 Difference]: Without dead ends: 17 [2022-11-03 01:52:33,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=192, Invalid=800, Unknown=0, NotChecked=0, Total=992 [2022-11-03 01:52:33,224 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 35 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:33,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 23 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:52:33,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-03 01:52:33,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2022-11-03 01:52:33,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:33,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-11-03 01:52:33,231 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2022-11-03 01:52:33,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:33,232 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-11-03 01:52:33,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 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) [2022-11-03 01:52:33,232 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-11-03 01:52:33,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-03 01:52:33,233 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:33,233 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:52:33,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:33,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:52:33,461 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:33,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:33,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1698574617, now seen corresponding path program 2 times [2022-11-03 01:52:33,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:52:33,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187886383] [2022-11-03 01:52:33,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:33,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:52:33,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:33,828 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:33,828 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:52:33,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187886383] [2022-11-03 01:52:33,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187886383] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:52:33,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028187560] [2022-11-03 01:52:33,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:52:33,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:52:33,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:52:33,831 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:52:33,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 01:52:33,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 01:52:33,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:52:33,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:52:33,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:34,167 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:34,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:52:34,286 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:34,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028187560] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:52:34,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [630160369] [2022-11-03 01:52:34,289 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:52:34,289 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:52:34,290 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:52:34,290 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:52:34,290 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:52:34,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:34,345 INFO L356 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2022-11-03 01:52:34,345 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 40 [2022-11-03 01:52:34,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:34,408 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 01:52:34,408 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 01:52:34,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:34,477 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 175 [2022-11-03 01:52:34,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:34,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:34,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:34,598 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 248 treesize of output 296 [2022-11-03 01:52:34,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:34,629 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 194 treesize of output 198 [2022-11-03 01:52:34,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:34,658 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 196 treesize of output 200 [2022-11-03 01:52:34,683 INFO L390 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 187 treesize of output 185 [2022-11-03 01:52:34,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:34,713 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 01:52:34,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:34,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:34,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:34,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:34,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:34,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:34,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:34,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:34,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:34,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:34,882 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 62 [2022-11-03 01:52:34,904 INFO L390 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 7 treesize of output 3 [2022-11-03 01:52:34,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:34,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:34,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:34,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:34,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:34,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:34,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:34,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:34,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:34,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:34,956 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 61 [2022-11-03 01:52:34,974 INFO L390 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 7 treesize of output 3 [2022-11-03 01:52:35,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:35,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:35,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:35,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:35,044 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 92 [2022-11-03 01:52:35,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:35,312 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-03 01:52:35,335 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 129 [2022-11-03 01:52:35,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:35,382 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-11-03 01:52:35,410 INFO L390 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 68 [2022-11-03 01:52:35,450 INFO L390 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 68 [2022-11-03 01:52:35,485 INFO L390 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 21 treesize of output 7 [2022-11-03 01:52:35,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:35,521 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 16 [2022-11-03 01:52:35,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:35,541 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 76 [2022-11-03 01:52:35,558 INFO L390 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 0 case distinctions, treesize of input 33 treesize of output 21 [2022-11-03 01:52:35,570 INFO L390 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 21 treesize of output 7 [2022-11-03 01:52:35,594 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 01:52:35,619 INFO L390 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 10 treesize of output 3 [2022-11-03 01:52:35,638 INFO L390 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 10 treesize of output 3 [2022-11-03 01:52:35,950 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:52:36,788 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '422#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:52:36,788 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:52:36,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:52:36,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2022-11-03 01:52:36,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959402605] [2022-11-03 01:52:36,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:52:36,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-03 01:52:36,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:52:36,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-03 01:52:36,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2022-11-03 01:52:36,791 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 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) [2022-11-03 01:52:37,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:37,116 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2022-11-03 01:52:37,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 01:52:37,118 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 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 [2022-11-03 01:52:37,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:37,118 INFO L225 Difference]: With dead ends: 29 [2022-11-03 01:52:37,118 INFO L226 Difference]: Without dead ends: 17 [2022-11-03 01:52:37,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2022-11-03 01:52:37,120 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 28 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:37,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 30 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:52:37,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-03 01:52:37,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2022-11-03 01:52:37,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:37,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-11-03 01:52:37,136 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 14 [2022-11-03 01:52:37,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:37,137 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-11-03 01:52:37,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 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) [2022-11-03 01:52:37,137 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-11-03 01:52:37,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-03 01:52:37,139 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:37,139 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 01:52:37,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:37,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:52:37,365 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:37,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:37,366 INFO L85 PathProgramCache]: Analyzing trace with hash -825002551, now seen corresponding path program 3 times [2022-11-03 01:52:37,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:52:37,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323088743] [2022-11-03 01:52:37,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:37,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:52:37,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:38,091 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:38,091 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:52:38,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323088743] [2022-11-03 01:52:38,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323088743] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:52:38,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003729605] [2022-11-03 01:52:38,092 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:52:38,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:52:38,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:52:38,093 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:52:38,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 01:52:38,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:52:38,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:52:38,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 01:52:38,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:38,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:38,316 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 43 [2022-11-03 01:52:38,408 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 101 [2022-11-03 01:52:38,417 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 99 [2022-11-03 01:52:38,539 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 24 [2022-11-03 01:52:38,549 INFO L390 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 0 case distinctions, treesize of input 43 treesize of output 36 [2022-11-03 01:52:38,556 INFO L390 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 7 treesize of output 3 [2022-11-03 01:52:38,566 INFO L390 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 7 treesize of output 3 [2022-11-03 01:52:38,606 INFO L390 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 0 case distinctions, treesize of input 45 treesize of output 31 [2022-11-03 01:52:38,613 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 31 treesize of output 16 [2022-11-03 01:52:38,957 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 45 [2022-11-03 01:52:38,999 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:38,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:52:39,254 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:52:39,254 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-11-03 01:52:39,359 INFO L390 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 0 case distinctions, treesize of input 181 treesize of output 160 [2022-11-03 01:52:39,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:52:39,374 INFO L356 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-03 01:52:39,375 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 98 [2022-11-03 01:52:39,394 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2022-11-03 01:52:39,440 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:39,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003729605] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:52:39,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2144956566] [2022-11-03 01:52:39,442 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:52:39,443 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:52:39,443 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:52:39,443 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:52:39,444 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:52:39,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:39,504 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 01:52:39,505 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 01:52:39,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:39,519 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 24 treesize of output 32 [2022-11-03 01:52:39,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:39,591 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 185 [2022-11-03 01:52:39,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:39,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:39,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:39,633 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 205 treesize of output 229 [2022-11-03 01:52:39,668 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-11-03 01:52:39,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:39,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:39,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:39,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:39,774 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 204 treesize of output 160 [2022-11-03 01:52:39,797 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 62 treesize of output 19 [2022-11-03 01:52:39,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:39,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:39,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:39,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:39,836 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 205 treesize of output 152 [2022-11-03 01:52:39,859 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 56 treesize of output 17 [2022-11-03 01:52:39,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:39,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:39,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:39,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:39,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:39,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:39,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:39,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:39,959 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 212 [2022-11-03 01:52:39,971 INFO L390 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 21 treesize of output 7 [2022-11-03 01:52:40,009 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 01:52:40,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:40,093 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-03 01:52:40,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:40,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 136 [2022-11-03 01:52:40,172 INFO L390 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 21 treesize of output 7 [2022-11-03 01:52:40,192 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 01:52:40,203 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 119 [2022-11-03 01:52:40,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:40,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-11-03 01:52:40,303 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 62 treesize of output 19 [2022-11-03 01:52:40,324 INFO L390 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 0 case distinctions, treesize of input 66 treesize of output 50 [2022-11-03 01:52:40,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:40,355 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 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 71 treesize of output 46 [2022-11-03 01:52:40,373 INFO L390 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 21 treesize of output 7 [2022-11-03 01:52:40,631 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:52:41,567 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '610#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:52:41,568 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:52:41,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:52:41,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-11-03 01:52:41,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845838983] [2022-11-03 01:52:41,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:52:41,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-03 01:52:41,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:52:41,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-03 01:52:41,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2022-11-03 01:52:41,570 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 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) [2022-11-03 01:52:42,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:42,582 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2022-11-03 01:52:42,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 01:52:42,584 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 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 15 [2022-11-03 01:52:42,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:42,585 INFO L225 Difference]: With dead ends: 24 [2022-11-03 01:52:42,585 INFO L226 Difference]: Without dead ends: 22 [2022-11-03 01:52:42,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=241, Invalid=1399, Unknown=0, NotChecked=0, Total=1640 [2022-11-03 01:52:42,587 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 37 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:42,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 45 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:52:42,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-03 01:52:42,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2022-11-03 01:52:42,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:42,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-11-03 01:52:42,595 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2022-11-03 01:52:42,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:42,595 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-11-03 01:52:42,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 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) [2022-11-03 01:52:42,596 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-11-03 01:52:42,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-03 01:52:42,596 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:42,597 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 01:52:42,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-03 01:52:42,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:52:42,811 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:42,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:42,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1842852278, now seen corresponding path program 4 times [2022-11-03 01:52:42,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:52:42,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177999008] [2022-11-03 01:52:42,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:42,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:52:42,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:43,599 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:43,599 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:52:43,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177999008] [2022-11-03 01:52:43,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177999008] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:52:43,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815228590] [2022-11-03 01:52:43,599 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 01:52:43,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:52:43,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:52:43,609 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:52:43,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 01:52:43,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:43,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 01:52:43,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:43,751 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 43 [2022-11-03 01:52:43,770 INFO L390 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 0 case distinctions, treesize of input 18 treesize of output 7 [2022-11-03 01:52:43,775 INFO L390 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 7 treesize of output 3 [2022-11-03 01:52:44,013 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 37 [2022-11-03 01:52:44,079 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:44,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:52:44,311 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:52:44,311 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-11-03 01:52:44,352 INFO L356 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-03 01:52:44,353 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 35 [2022-11-03 01:52:44,372 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:44,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815228590] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:52:44,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [12475006] [2022-11-03 01:52:44,375 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:52:44,375 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:52:44,376 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:52:44,376 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:52:44,376 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:52:44,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:44,433 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 01:52:44,434 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 01:52:44,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:44,450 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 24 treesize of output 32 [2022-11-03 01:52:44,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:44,502 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 175 [2022-11-03 01:52:44,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:44,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:44,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:44,544 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 207 [2022-11-03 01:52:44,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:44,593 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 01:52:44,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:44,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:44,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:44,768 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 435 treesize of output 472 [2022-11-03 01:52:44,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:44,798 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 357 treesize of output 359 [2022-11-03 01:52:44,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:44,832 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 342 treesize of output 344 [2022-11-03 01:52:44,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:44,876 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 01:52:44,953 INFO L390 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 11 treesize of output 7 [2022-11-03 01:52:44,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:44,998 INFO L390 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 [2022-11-03 01:52:45,029 INFO L390 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 13 treesize of output 9 [2022-11-03 01:52:45,062 INFO L390 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 13 treesize of output 9 [2022-11-03 01:52:45,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:45,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:45,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:45,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:45,227 INFO L390 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 0 case distinctions, treesize of input 75 treesize of output 53 [2022-11-03 01:52:45,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:45,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:52:45,255 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 [2022-11-03 01:52:45,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:45,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:45,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:45,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:45,284 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 323 treesize of output 332 [2022-11-03 01:52:45,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:45,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:52:45,373 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 [2022-11-03 01:52:45,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:45,616 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-03 01:52:45,638 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 129 [2022-11-03 01:52:45,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:45,662 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-11-03 01:52:45,719 INFO L390 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 56 [2022-11-03 01:52:45,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:45,732 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 14 [2022-11-03 01:52:45,744 INFO L390 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 21 treesize of output 7 [2022-11-03 01:52:45,761 INFO L390 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 68 [2022-11-03 01:52:45,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:45,807 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 16 [2022-11-03 01:52:45,816 INFO L390 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 10 treesize of output 3 [2022-11-03 01:52:45,828 INFO L390 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 0 case distinctions, treesize of input 21 treesize of output 10 [2022-11-03 01:52:45,837 INFO L390 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 10 treesize of output 3 [2022-11-03 01:52:45,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:45,851 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 76 [2022-11-03 01:52:45,874 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 01:52:45,886 INFO L390 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 0 case distinctions, treesize of input 33 treesize of output 21 [2022-11-03 01:52:45,899 INFO L390 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 21 treesize of output 7 [2022-11-03 01:52:46,212 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:52:47,040 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '821#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:52:47,040 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:52:47,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:52:47,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-11-03 01:52:47,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616127424] [2022-11-03 01:52:47,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:52:47,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-03 01:52:47,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:52:47,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-03 01:52:47,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2022-11-03 01:52:47,043 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:47,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:47,980 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2022-11-03 01:52:47,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 01:52:47,981 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-03 01:52:47,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:47,983 INFO L225 Difference]: With dead ends: 29 [2022-11-03 01:52:47,983 INFO L226 Difference]: Without dead ends: 27 [2022-11-03 01:52:47,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=253, Invalid=1639, Unknown=0, NotChecked=0, Total=1892 [2022-11-03 01:52:47,986 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 27 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:47,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 50 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:52:47,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-03 01:52:47,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2022-11-03 01:52:47,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 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) [2022-11-03 01:52:47,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-11-03 01:52:47,996 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 18 [2022-11-03 01:52:47,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:47,997 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-11-03 01:52:47,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:47,997 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-11-03 01:52:47,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-03 01:52:47,998 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:47,998 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 01:52:48,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:48,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:52:48,205 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:48,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:48,206 INFO L85 PathProgramCache]: Analyzing trace with hash -2134959575, now seen corresponding path program 5 times [2022-11-03 01:52:48,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:52:48,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356533999] [2022-11-03 01:52:48,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:48,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:52:48,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:48,666 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:48,666 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:52:48,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356533999] [2022-11-03 01:52:48,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356533999] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:52:48,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546009351] [2022-11-03 01:52:48,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:52:48,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:52:48,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:52:48,669 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:52:48,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 01:52:48,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-03 01:52:48,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:52:48,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:52:48,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:49,183 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:49,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:52:49,382 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:49,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546009351] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:52:49,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1747455267] [2022-11-03 01:52:49,384 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:52:49,385 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:52:49,385 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:52:49,385 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:52:49,386 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:52:49,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:49,444 INFO L356 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2022-11-03 01:52:49,445 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 40 [2022-11-03 01:52:49,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:49,499 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 01:52:49,500 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 01:52:49,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:49,559 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 175 [2022-11-03 01:52:49,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:49,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:49,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:49,662 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 269 treesize of output 311 [2022-11-03 01:52:49,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:49,687 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 194 treesize of output 198 [2022-11-03 01:52:49,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:49,715 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 196 treesize of output 200 [2022-11-03 01:52:49,738 INFO L390 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 187 treesize of output 185 [2022-11-03 01:52:49,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:49,765 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 01:52:50,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:50,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:50,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:50,101 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 290 treesize of output 267 [2022-11-03 01:52:50,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:50,119 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 262 treesize of output 278 [2022-11-03 01:52:50,138 INFO L390 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 227 treesize of output 223 [2022-11-03 01:52:50,297 INFO L390 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 11 treesize of output 7 [2022-11-03 01:52:50,323 INFO L390 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 11 treesize of output 7 [2022-11-03 01:52:50,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:50,347 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 232 treesize of output 219 [2022-11-03 01:52:50,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:50,381 INFO L390 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 213 treesize of output 207 [2022-11-03 01:52:50,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:50,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:50,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:50,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:50,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:50,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:50,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:50,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:50,450 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 90 [2022-11-03 01:52:50,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:50,465 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 38 treesize of output 14 [2022-11-03 01:52:50,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:50,551 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-03 01:52:50,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:50,583 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 136 [2022-11-03 01:52:50,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:50,639 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 17 [2022-11-03 01:52:50,656 INFO L390 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 21 treesize of output 7 [2022-11-03 01:52:50,673 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 177 [2022-11-03 01:52:50,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:50,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-11-03 01:52:50,726 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 01:52:50,756 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 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 73 treesize of output 67 [2022-11-03 01:52:50,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:50,772 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2022-11-03 01:52:50,799 INFO L390 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 21 treesize of output 7 [2022-11-03 01:52:50,831 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-11-03 01:52:51,134 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:52:51,945 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1074#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:52:51,945 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:52:51,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:52:51,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 27 [2022-11-03 01:52:51,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541653455] [2022-11-03 01:52:51,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:52:51,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-03 01:52:51,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:52:51,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-03 01:52:51,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=929, Unknown=0, NotChecked=0, Total=1122 [2022-11-03 01:52:51,949 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 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) [2022-11-03 01:52:52,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:52,353 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2022-11-03 01:52:52,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 01:52:52,353 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 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 21 [2022-11-03 01:52:52,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:52,354 INFO L225 Difference]: With dead ends: 41 [2022-11-03 01:52:52,354 INFO L226 Difference]: Without dead ends: 23 [2022-11-03 01:52:52,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=328, Invalid=1394, Unknown=0, NotChecked=0, Total=1722 [2022-11-03 01:52:52,356 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 39 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:52,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 49 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:52:52,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-03 01:52:52,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-03 01:52:52,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 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) [2022-11-03 01:52:52,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2022-11-03 01:52:52,367 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 21 [2022-11-03 01:52:52,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:52,367 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2022-11-03 01:52:52,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 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) [2022-11-03 01:52:52,368 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2022-11-03 01:52:52,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-03 01:52:52,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:52,369 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2022-11-03 01:52:52,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:52,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:52:52,587 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:52,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:52,587 INFO L85 PathProgramCache]: Analyzing trace with hash 2138067207, now seen corresponding path program 6 times [2022-11-03 01:52:52,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:52:52,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80769109] [2022-11-03 01:52:52,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:52,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:52:52,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:53,452 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:53,452 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:52:53,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80769109] [2022-11-03 01:52:53,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80769109] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:52:53,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087720921] [2022-11-03 01:52:53,453 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:52:53,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:52:53,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:52:53,457 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:52:53,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 01:52:53,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:52:53,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:52:53,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 01:52:53,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:53,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:53,707 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 43 [2022-11-03 01:52:53,781 INFO L390 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 75 [2022-11-03 01:52:53,789 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 18 treesize of output 22 [2022-11-03 01:52:53,843 INFO L390 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 7 treesize of output 3 [2022-11-03 01:52:53,848 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 97 [2022-11-03 01:52:53,857 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 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 28 treesize of output 58 [2022-11-03 01:52:53,885 INFO L390 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 14 [2022-11-03 01:52:53,912 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 30 treesize of output 9 [2022-11-03 01:52:53,958 INFO L390 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 0 case distinctions, treesize of input 35 treesize of output 20 [2022-11-03 01:52:53,965 INFO L390 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 7 treesize of output 3 [2022-11-03 01:52:53,973 INFO L390 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 0 case distinctions, treesize of input 36 treesize of output 22 [2022-11-03 01:52:54,536 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 45 [2022-11-03 01:52:54,595 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:54,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:52:54,948 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:52:54,948 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-11-03 01:52:55,056 INFO L390 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 0 case distinctions, treesize of input 181 treesize of output 160 [2022-11-03 01:52:55,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:52:55,072 INFO L356 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-03 01:52:55,072 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 98 [2022-11-03 01:52:55,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2022-11-03 01:52:55,183 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:55,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087720921] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:52:55,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1452702531] [2022-11-03 01:52:55,186 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:52:55,186 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:52:55,186 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:52:55,187 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:52:55,187 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:52:55,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:55,249 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 01:52:55,249 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 01:52:55,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:55,265 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 24 treesize of output 32 [2022-11-03 01:52:55,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:55,320 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 175 [2022-11-03 01:52:55,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:55,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:55,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 195 treesize of output 217 [2022-11-03 01:52:55,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:55,390 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 01:52:55,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:55,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:55,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:55,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:55,467 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 64 [2022-11-03 01:52:55,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:55,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:55,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:55,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:55,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:55,518 INFO L390 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 64 treesize of output 42 [2022-11-03 01:52:55,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:55,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:55,543 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 9 [2022-11-03 01:52:55,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:55,559 INFO L390 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 [2022-11-03 01:52:55,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:55,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:55,584 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 196 [2022-11-03 01:52:55,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:55,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:55,656 INFO L390 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 0 case distinctions, treesize of input 148 treesize of output 120 [2022-11-03 01:52:55,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:55,670 INFO L390 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 17 treesize of output 11 [2022-11-03 01:52:55,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:55,777 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-03 01:52:55,797 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 129 [2022-11-03 01:52:55,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:55,822 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-11-03 01:52:55,849 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 62 treesize of output 19 [2022-11-03 01:52:55,881 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 62 treesize of output 19 [2022-11-03 01:52:55,902 INFO L390 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 21 treesize of output 7 [2022-11-03 01:52:55,960 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 197 treesize of output 242 [2022-11-03 01:52:55,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:55,985 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-11-03 01:52:56,138 INFO L390 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 21 treesize of output 7 [2022-11-03 01:52:56,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:52:56,174 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 52 treesize of output 16 [2022-11-03 01:52:56,190 INFO L390 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 0 case distinctions, treesize of input 138 treesize of output 143 [2022-11-03 01:52:56,245 INFO L390 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 21 treesize of output 7 [2022-11-03 01:52:56,522 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:52:57,530 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1344#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:52:57,531 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:52:57,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:52:57,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 33 [2022-11-03 01:52:57,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441313282] [2022-11-03 01:52:57,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:52:57,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-03 01:52:57,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:52:57,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-03 01:52:57,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1415, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 01:52:57,534 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 33 states have internal predecessors, (61), 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) [2022-11-03 01:52:59,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:59,712 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2022-11-03 01:52:59,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-03 01:52:59,713 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 33 states have internal predecessors, (61), 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 22 [2022-11-03 01:52:59,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:59,714 INFO L225 Difference]: With dead ends: 34 [2022-11-03 01:52:59,714 INFO L226 Difference]: Without dead ends: 32 [2022-11-03 01:52:59,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=377, Invalid=2929, Unknown=0, NotChecked=0, Total=3306 [2022-11-03 01:52:59,717 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 53 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:59,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 72 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:52:59,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-03 01:52:59,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2022-11-03 01:52:59,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 25 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) [2022-11-03 01:52:59,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2022-11-03 01:52:59,731 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 22 [2022-11-03 01:52:59,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:59,731 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2022-11-03 01:52:59,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 33 states have internal predecessors, (61), 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) [2022-11-03 01:52:59,732 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2022-11-03 01:52:59,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-03 01:52:59,733 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:59,733 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 1, 1, 1, 1, 1, 1] [2022-11-03 01:52:59,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:59,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-03 01:52:59,934 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:59,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:59,935 INFO L85 PathProgramCache]: Analyzing trace with hash 800440908, now seen corresponding path program 7 times [2022-11-03 01:52:59,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:52:59,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656740995] [2022-11-03 01:52:59,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:59,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:52:59,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:00,788 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:00,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:53:00,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656740995] [2022-11-03 01:53:00,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656740995] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:53:00,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298283081] [2022-11-03 01:53:00,788 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 01:53:00,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:53:00,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:53:00,791 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:53:00,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 01:53:00,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:00,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 01:53:00,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:01,006 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 43 [2022-11-03 01:53:01,018 INFO L390 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 0 case distinctions, treesize of input 18 treesize of output 7 [2022-11-03 01:53:01,027 INFO L390 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 7 treesize of output 3 [2022-11-03 01:53:01,410 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 37 [2022-11-03 01:53:01,461 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:01,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:53:01,887 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:53:01,888 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-11-03 01:53:01,924 INFO L356 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-03 01:53:01,925 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 35 [2022-11-03 01:53:01,952 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:01,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298283081] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:53:01,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [653350968] [2022-11-03 01:53:01,954 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:53:01,955 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:53:01,955 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:53:01,955 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:53:01,955 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:53:01,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:02,014 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 01:53:02,014 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 01:53:02,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:02,026 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 24 treesize of output 32 [2022-11-03 01:53:02,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:02,081 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 175 [2022-11-03 01:53:02,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:02,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:02,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:02,171 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 241 treesize of output 291 [2022-11-03 01:53:02,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:02,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 173 treesize of output 177 [2022-11-03 01:53:02,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:02,226 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 175 treesize of output 179 [2022-11-03 01:53:02,249 INFO L390 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 166 treesize of output 164 [2022-11-03 01:53:02,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:02,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:02,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 01:53:02,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:02,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:02,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:02,586 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 76 [2022-11-03 01:53:02,595 INFO L390 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 7 treesize of output 3 [2022-11-03 01:53:02,611 INFO L390 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 7 treesize of output 3 [2022-11-03 01:53:02,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:02,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:02,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:02,661 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 298 treesize of output 339 [2022-11-03 01:53:02,685 INFO L390 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 249 treesize of output 245 [2022-11-03 01:53:02,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:02,992 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-03 01:53:03,013 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 129 [2022-11-03 01:53:03,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:03,038 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-11-03 01:53:03,107 INFO L390 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 56 [2022-11-03 01:53:03,120 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 56 treesize of output 17 [2022-11-03 01:53:03,137 INFO L390 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 21 treesize of output 7 [2022-11-03 01:53:03,166 INFO L390 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 70 [2022-11-03 01:53:03,180 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 62 treesize of output 19 [2022-11-03 01:53:03,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:03,201 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 76 [2022-11-03 01:53:03,214 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 01:53:03,232 INFO L390 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 21 treesize of output 7 [2022-11-03 01:53:03,254 INFO L390 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 10 treesize of output 3 [2022-11-03 01:53:03,280 INFO L390 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 10 treesize of output 3 [2022-11-03 01:53:03,537 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:53:04,461 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1647#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:53:04,462 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:53:04,462 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:53:04,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 31 [2022-11-03 01:53:04,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890592534] [2022-11-03 01:53:04,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:53:04,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-03 01:53:04,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:53:04,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-03 01:53:04,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1286, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 01:53:04,465 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 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) [2022-11-03 01:53:07,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:07,237 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2022-11-03 01:53:07,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-03 01:53:07,237 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 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 25 [2022-11-03 01:53:07,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:07,238 INFO L225 Difference]: With dead ends: 55 [2022-11-03 01:53:07,238 INFO L226 Difference]: Without dead ends: 53 [2022-11-03 01:53:07,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=515, Invalid=4315, Unknown=0, NotChecked=0, Total=4830 [2022-11-03 01:53:07,241 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 53 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:07,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 94 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 01:53:07,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-03 01:53:07,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 29. [2022-11-03 01:53:07,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 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) [2022-11-03 01:53:07,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2022-11-03 01:53:07,256 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 25 [2022-11-03 01:53:07,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:07,257 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2022-11-03 01:53:07,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 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) [2022-11-03 01:53:07,257 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2022-11-03 01:53:07,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-03 01:53:07,258 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:07,258 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 1, 1, 1, 1, 1, 1] [2022-11-03 01:53:07,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:07,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:53:07,465 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:07,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:07,465 INFO L85 PathProgramCache]: Analyzing trace with hash 281939687, now seen corresponding path program 8 times [2022-11-03 01:53:07,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:53:07,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868353615] [2022-11-03 01:53:07,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:07,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:53:07,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:08,089 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 41 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:08,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:53:08,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868353615] [2022-11-03 01:53:08,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868353615] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:53:08,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29918717] [2022-11-03 01:53:08,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:53:08,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:53:08,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:53:08,092 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:53:08,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 01:53:08,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-03 01:53:08,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:53:08,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 01:53:08,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:08,857 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 57 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:08,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:53:09,193 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 57 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:09,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29918717] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:53:09,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [604847776] [2022-11-03 01:53:09,195 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:53:09,195 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:53:09,195 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:53:09,195 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:53:09,195 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:53:09,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:09,258 INFO L356 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2022-11-03 01:53:09,259 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 40 [2022-11-03 01:53:09,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:09,307 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 01:53:09,307 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 01:53:09,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:09,364 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 185 [2022-11-03 01:53:09,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:09,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:09,425 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 212 treesize of output 234 [2022-11-03 01:53:09,454 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-11-03 01:53:09,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:09,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:09,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:09,579 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 441 treesize of output 494 [2022-11-03 01:53:09,608 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 352 treesize of output 351 [2022-11-03 01:53:09,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 328 treesize of output 327 [2022-11-03 01:53:09,676 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-11-03 01:53:09,748 INFO L390 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 19 treesize of output 12 [2022-11-03 01:53:09,775 INFO L390 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 19 treesize of output 12 [2022-11-03 01:53:09,801 INFO L390 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 21 treesize of output 7 [2022-11-03 01:53:09,829 INFO L390 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 17 treesize of output 10 [2022-11-03 01:53:09,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:09,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:09,984 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 118 [2022-11-03 01:53:10,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:10,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:10,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:10,022 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 309 treesize of output 292 [2022-11-03 01:53:10,062 INFO L390 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 21 treesize of output 7 [2022-11-03 01:53:10,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:10,134 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 51 [2022-11-03 01:53:10,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:10,230 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-03 01:53:10,248 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 129 [2022-11-03 01:53:10,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:10,270 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-11-03 01:53:10,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:10,325 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 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 74 treesize of output 58 [2022-11-03 01:53:10,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:10,357 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 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 71 treesize of output 46 [2022-11-03 01:53:10,374 INFO L390 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 21 treesize of output 7 [2022-11-03 01:53:10,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:10,394 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 76 [2022-11-03 01:53:10,414 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 01:53:10,425 INFO L390 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 0 case distinctions, treesize of input 42 treesize of output 30 [2022-11-03 01:53:10,433 INFO L390 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 30 treesize of output 16 [2022-11-03 01:53:10,449 INFO L390 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 0 case distinctions, treesize of input 21 treesize of output 10 [2022-11-03 01:53:10,458 INFO L390 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 10 treesize of output 3 [2022-11-03 01:53:10,475 INFO L390 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 10 treesize of output 3 [2022-11-03 01:53:10,486 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 62 treesize of output 19 [2022-11-03 01:53:10,723 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:53:11,603 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2036#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:53:11,603 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:53:11,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:53:11,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 37 [2022-11-03 01:53:11,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638532504] [2022-11-03 01:53:11,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:53:11,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-03 01:53:11,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:53:11,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-03 01:53:11,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=1554, Unknown=0, NotChecked=0, Total=1892 [2022-11-03 01:53:11,606 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 37 states have internal predecessors, (78), 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) [2022-11-03 01:53:12,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:12,055 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2022-11-03 01:53:12,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 01:53:12,056 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 37 states have internal predecessors, (78), 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 [2022-11-03 01:53:12,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:12,057 INFO L225 Difference]: With dead ends: 54 [2022-11-03 01:53:12,057 INFO L226 Difference]: Without dead ends: 30 [2022-11-03 01:53:12,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=557, Invalid=2305, Unknown=0, NotChecked=0, Total=2862 [2022-11-03 01:53:12,059 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 65 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:12,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 60 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:53:12,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-03 01:53:12,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-03 01:53:12,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 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) [2022-11-03 01:53:12,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2022-11-03 01:53:12,074 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 28 [2022-11-03 01:53:12,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:12,074 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2022-11-03 01:53:12,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 37 states have internal predecessors, (78), 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) [2022-11-03 01:53:12,075 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2022-11-03 01:53:12,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-03 01:53:12,075 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:12,076 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 1, 1, 1, 1, 1, 1] [2022-11-03 01:53:12,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:12,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 01:53:12,277 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:12,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:12,278 INFO L85 PathProgramCache]: Analyzing trace with hash -306642359, now seen corresponding path program 9 times [2022-11-03 01:53:12,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:53:12,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857663196] [2022-11-03 01:53:12,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:12,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:53:12,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:13,427 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:13,428 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:53:13,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857663196] [2022-11-03 01:53:13,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857663196] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:53:13,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288299029] [2022-11-03 01:53:13,428 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:53:13,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:53:13,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:53:13,430 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:53:13,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 01:53:13,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:53:13,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:53:13,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-03 01:53:13,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:13,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:13,764 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 43 [2022-11-03 01:53:13,854 INFO L390 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 98 [2022-11-03 01:53:13,860 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 91 [2022-11-03 01:53:13,867 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 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 67 treesize of output 89 [2022-11-03 01:53:13,876 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 18 treesize of output 22 [2022-11-03 01:53:13,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:13,889 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 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 50 treesize of output 38 [2022-11-03 01:53:13,895 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 30 treesize of output 9 [2022-11-03 01:53:13,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:13,911 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 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 50 treesize of output 38 [2022-11-03 01:53:13,917 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 30 treesize of output 9 [2022-11-03 01:53:13,952 INFO L390 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 7 treesize of output 3 [2022-11-03 01:53:14,031 INFO L390 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 0 case distinctions, treesize of input 18 treesize of output 7 [2022-11-03 01:53:14,035 INFO L390 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 7 treesize of output 3 [2022-11-03 01:53:14,048 INFO L390 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 7 treesize of output 3 [2022-11-03 01:53:14,806 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 45 [2022-11-03 01:53:14,866 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:14,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:53:15,334 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:53:15,335 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-11-03 01:53:15,422 INFO L390 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 0 case distinctions, treesize of input 181 treesize of output 160 [2022-11-03 01:53:15,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:53:15,439 INFO L356 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-03 01:53:15,439 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 98 [2022-11-03 01:53:15,461 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2022-11-03 01:53:15,595 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:15,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288299029] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:53:15,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1166699408] [2022-11-03 01:53:15,598 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:53:15,598 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:53:15,598 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:53:15,598 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:53:15,599 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:53:15,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:15,651 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 01:53:15,652 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 01:53:15,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:15,669 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 24 treesize of output 32 [2022-11-03 01:53:15,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:15,717 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 185 [2022-11-03 01:53:15,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:15,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:15,753 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 198 treesize of output 224 [2022-11-03 01:53:15,787 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-11-03 01:53:15,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:15,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:15,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:15,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:15,873 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 106 [2022-11-03 01:53:15,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:15,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:15,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:15,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:15,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:15,924 INFO L390 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 110 treesize of output 84 [2022-11-03 01:53:15,947 INFO L390 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 21 treesize of output 7 [2022-11-03 01:53:16,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:16,009 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 212 [2022-11-03 01:53:16,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:16,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:16,039 INFO L390 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 0 case distinctions, treesize of input 122 treesize of output 98 [2022-11-03 01:53:16,051 INFO L390 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 21 treesize of output 7 [2022-11-03 01:53:16,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:16,158 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-03 01:53:16,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:16,184 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 136 [2022-11-03 01:53:16,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:16,202 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 17 [2022-11-03 01:53:16,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:16,220 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 17 [2022-11-03 01:53:16,251 INFO L390 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 21 treesize of output 7 [2022-11-03 01:53:16,262 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 175 [2022-11-03 01:53:16,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:16,285 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-11-03 01:53:16,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:53:16,383 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 43 treesize of output 19 [2022-11-03 01:53:16,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:53:16,409 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 43 treesize of output 19 [2022-11-03 01:53:16,423 INFO L390 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 0 case distinctions, treesize of input 107 treesize of output 110 [2022-11-03 01:53:16,454 INFO L390 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 21 treesize of output 7 [2022-11-03 01:53:16,469 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 01:53:16,713 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:53:17,785 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2389#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:53:17,785 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:53:17,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:53:17,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 42 [2022-11-03 01:53:17,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102803143] [2022-11-03 01:53:17,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:53:17,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-03 01:53:17,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:53:17,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-03 01:53:17,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=2174, Unknown=0, NotChecked=0, Total=2352 [2022-11-03 01:53:17,788 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 42 states, 42 states have (on average 1.9523809523809523) internal successors, (82), 42 states have internal predecessors, (82), 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) [2022-11-03 01:53:23,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:23,261 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2022-11-03 01:53:23,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-03 01:53:23,262 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9523809523809523) internal successors, (82), 42 states have internal predecessors, (82), 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 29 [2022-11-03 01:53:23,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:23,263 INFO L225 Difference]: With dead ends: 63 [2022-11-03 01:53:23,263 INFO L226 Difference]: Without dead ends: 61 [2022-11-03 01:53:23,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1607 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=744, Invalid=6738, Unknown=0, NotChecked=0, Total=7482 [2022-11-03 01:53:23,266 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 91 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:23,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 138 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 01:53:23,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-03 01:53:23,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 33. [2022-11-03 01:53:23,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.0625) internal successors, (34), 32 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) [2022-11-03 01:53:23,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2022-11-03 01:53:23,287 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 29 [2022-11-03 01:53:23,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:23,287 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2022-11-03 01:53:23,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9523809523809523) internal successors, (82), 42 states have internal predecessors, (82), 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) [2022-11-03 01:53:23,288 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2022-11-03 01:53:23,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-03 01:53:23,289 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:23,289 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 1, 1, 1, 1, 1, 1] [2022-11-03 01:53:23,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:23,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:53:23,505 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:23,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:23,505 INFO L85 PathProgramCache]: Analyzing trace with hash 218198474, now seen corresponding path program 10 times [2022-11-03 01:53:23,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:53:23,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689371965] [2022-11-03 01:53:23,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:23,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:53:23,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:24,489 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:24,490 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:53:24,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689371965] [2022-11-03 01:53:24,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689371965] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:53:24,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314385573] [2022-11-03 01:53:24,490 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 01:53:24,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:53:24,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:53:24,497 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:53:24,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 01:53:24,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:24,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 01:53:24,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:24,763 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 43 [2022-11-03 01:53:24,785 INFO L390 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 0 case distinctions, treesize of input 18 treesize of output 7 [2022-11-03 01:53:24,790 INFO L390 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 7 treesize of output 3 [2022-11-03 01:53:25,371 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 37 [2022-11-03 01:53:25,425 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:25,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:53:25,967 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:53:25,967 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-11-03 01:53:25,995 INFO L390 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 0 case distinctions, treesize of input 54 treesize of output 39 [2022-11-03 01:53:26,005 INFO L356 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-03 01:53:26,006 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2022-11-03 01:53:26,014 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2022-11-03 01:53:26,039 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:26,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314385573] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:53:26,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [702681203] [2022-11-03 01:53:26,042 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:53:26,043 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:53:26,043 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:53:26,043 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:53:26,044 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:53:26,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:26,098 INFO L356 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2022-11-03 01:53:26,098 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 40 [2022-11-03 01:53:26,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:26,144 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 01:53:26,144 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 01:53:26,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:26,185 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 185 [2022-11-03 01:53:26,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:26,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:26,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:26,262 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 301 treesize of output 343 [2022-11-03 01:53:26,286 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 212 treesize of output 216 [2022-11-03 01:53:26,312 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 214 treesize of output 218 [2022-11-03 01:53:26,334 INFO L390 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 202 treesize of output 195 [2022-11-03 01:53:26,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:26,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-11-03 01:53:26,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:26,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:26,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:26,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:26,600 INFO L390 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 0 case distinctions, treesize of input 77 treesize of output 51 [2022-11-03 01:53:26,622 INFO L390 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 21 treesize of output 7 [2022-11-03 01:53:26,633 INFO L390 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 10 treesize of output 3 [2022-11-03 01:53:26,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:26,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:26,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:26,674 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 402 treesize of output 432 [2022-11-03 01:53:26,686 INFO L390 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 10 treesize of output 3 [2022-11-03 01:53:26,705 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 374 treesize of output 373 [2022-11-03 01:53:26,776 INFO L390 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 19 treesize of output 12 [2022-11-03 01:53:26,806 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 01:53:26,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:26,959 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-03 01:53:26,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:26,986 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 136 [2022-11-03 01:53:27,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:27,006 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 14 [2022-11-03 01:53:27,019 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 01:53:27,044 INFO L390 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 21 treesize of output 7 [2022-11-03 01:53:27,064 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 119 [2022-11-03 01:53:27,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:27,086 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-11-03 01:53:27,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:27,139 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2022-11-03 01:53:27,165 INFO L390 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 0 case distinctions, treesize of input 57 treesize of output 41 [2022-11-03 01:53:27,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:27,190 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 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 64 treesize of output 39 [2022-11-03 01:53:27,207 INFO L390 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 21 treesize of output 7 [2022-11-03 01:53:27,482 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:53:28,524 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2834#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:53:28,524 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:53:28,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:53:28,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 39 [2022-11-03 01:53:28,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194297979] [2022-11-03 01:53:28,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:53:28,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-03 01:53:28,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:53:28,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-03 01:53:28,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1925, Unknown=0, NotChecked=0, Total=2070 [2022-11-03 01:53:28,527 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 39 states have internal predecessors, (85), 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) [2022-11-03 01:53:34,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:34,638 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2022-11-03 01:53:34,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-03 01:53:34,639 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 39 states have internal predecessors, (85), 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 [2022-11-03 01:53:34,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:34,640 INFO L225 Difference]: With dead ends: 90 [2022-11-03 01:53:34,640 INFO L226 Difference]: Without dead ends: 88 [2022-11-03 01:53:34,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2570 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=936, Invalid=9366, Unknown=0, NotChecked=0, Total=10302 [2022-11-03 01:53:34,645 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 78 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 1015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:34,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 149 Invalid, 1015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-03 01:53:34,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-03 01:53:34,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 36. [2022-11-03 01:53:34,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:34,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2022-11-03 01:53:34,665 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 32 [2022-11-03 01:53:34,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:34,665 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2022-11-03 01:53:34,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 39 states have internal predecessors, (85), 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) [2022-11-03 01:53:34,666 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2022-11-03 01:53:34,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-03 01:53:34,667 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:34,667 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 1, 1, 1, 1, 1, 1] [2022-11-03 01:53:34,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:34,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-03 01:53:34,868 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:34,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:34,869 INFO L85 PathProgramCache]: Analyzing trace with hash 2070496937, now seen corresponding path program 11 times [2022-11-03 01:53:34,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:53:34,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623846981] [2022-11-03 01:53:34,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:34,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:53:34,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:35,648 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 78 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:35,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:53:35,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623846981] [2022-11-03 01:53:35,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623846981] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:53:35,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234856142] [2022-11-03 01:53:35,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:53:35,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:53:35,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:53:35,653 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:53:35,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 01:53:36,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-03 01:53:36,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:53:36,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 01:53:36,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:36,826 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 100 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:36,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:53:37,323 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 100 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:37,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234856142] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:53:37,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [76971421] [2022-11-03 01:53:37,326 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:53:37,326 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:53:37,326 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:53:37,326 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:53:37,327 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:53:37,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:37,388 INFO L356 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2022-11-03 01:53:37,388 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 40 [2022-11-03 01:53:37,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:37,440 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 01:53:37,441 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 01:53:37,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:37,508 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 185 [2022-11-03 01:53:37,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:37,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:37,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:37,593 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 301 treesize of output 343 [2022-11-03 01:53:37,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 212 treesize of output 216 [2022-11-03 01:53:37,644 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 214 treesize of output 218 [2022-11-03 01:53:37,666 INFO L390 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 202 treesize of output 195 [2022-11-03 01:53:37,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:37,696 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-11-03 01:53:37,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:37,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:37,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:37,935 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 420 treesize of output 486 [2022-11-03 01:53:38,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:38,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:38,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:38,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:38,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:38,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:38,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:38,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:38,092 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 54 [2022-11-03 01:53:38,113 INFO L390 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 10 treesize of output 3 [2022-11-03 01:53:38,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:38,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:38,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:38,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:38,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:38,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:38,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:38,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:38,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:38,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:38,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:38,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:38,156 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 53 [2022-11-03 01:53:38,176 INFO L390 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 10 treesize of output 3 [2022-11-03 01:53:38,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:38,373 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-03 01:53:38,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:38,399 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 136 [2022-11-03 01:53:38,439 INFO L390 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 21 treesize of output 7 [2022-11-03 01:53:38,454 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 56 treesize of output 17 [2022-11-03 01:53:38,469 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 177 [2022-11-03 01:53:38,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:38,492 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-11-03 01:53:38,578 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 01:53:38,590 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 174 treesize of output 207 [2022-11-03 01:53:38,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:38,631 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 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 25 treesize of output 25 [2022-11-03 01:53:38,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:53:38,678 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 43 treesize of output 19 [2022-11-03 01:53:38,696 INFO L390 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 0 case distinctions, treesize of input 33 treesize of output 21 [2022-11-03 01:53:38,707 INFO L390 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 21 treesize of output 7 [2022-11-03 01:53:38,727 INFO L390 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 21 treesize of output 7 [2022-11-03 01:53:38,967 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:53:39,948 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3382#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:53:39,948 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:53:39,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:53:39,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 46 [2022-11-03 01:53:39,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645379640] [2022-11-03 01:53:39,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:53:39,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-03 01:53:39,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:53:39,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-03 01:53:39,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=2256, Unknown=0, NotChecked=0, Total=2756 [2022-11-03 01:53:39,950 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 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) [2022-11-03 01:53:40,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:40,557 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2022-11-03 01:53:40,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:53:40,558 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 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 35 [2022-11-03 01:53:40,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:40,559 INFO L225 Difference]: With dead ends: 67 [2022-11-03 01:53:40,559 INFO L226 Difference]: Without dead ends: 37 [2022-11-03 01:53:40,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=811, Invalid=3349, Unknown=0, NotChecked=0, Total=4160 [2022-11-03 01:53:40,561 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 77 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:40,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 95 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:53:40,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-03 01:53:40,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-11-03 01:53:40,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 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) [2022-11-03 01:53:40,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2022-11-03 01:53:40,587 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 35 [2022-11-03 01:53:40,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:40,587 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2022-11-03 01:53:40,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 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) [2022-11-03 01:53:40,588 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2022-11-03 01:53:40,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 01:53:40,588 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:40,589 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 1, 1, 1, 1, 1, 1] [2022-11-03 01:53:40,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:40,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-03 01:53:40,793 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:40,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:40,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1526062841, now seen corresponding path program 12 times [2022-11-03 01:53:40,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:53:40,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714973802] [2022-11-03 01:53:40,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:40,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:53:40,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:42,279 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:42,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:53:42,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714973802] [2022-11-03 01:53:42,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714973802] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:53:42,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243930391] [2022-11-03 01:53:42,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:53:42,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:53:42,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:53:42,282 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:53:42,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 01:53:42,458 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:53:42,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:53:42,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-03 01:53:42,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:42,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:42,707 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 43 [2022-11-03 01:53:42,770 INFO L390 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 75 [2022-11-03 01:53:42,778 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 18 treesize of output 22 [2022-11-03 01:53:42,830 INFO L390 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 7 treesize of output 3 [2022-11-03 01:53:42,850 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 97 [2022-11-03 01:53:42,865 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 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 28 treesize of output 58 [2022-11-03 01:53:42,951 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2022-11-03 01:53:42,967 INFO L390 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 0 case distinctions, treesize of input 16 treesize of output 5 [2022-11-03 01:53:42,981 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2022-11-03 01:53:42,994 INFO L390 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 7 treesize of output 3 [2022-11-03 01:53:43,013 INFO L390 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 0 case distinctions, treesize of input 36 treesize of output 22 [2022-11-03 01:53:43,998 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 45 [2022-11-03 01:53:44,066 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:44,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:53:44,754 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:53:44,755 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-11-03 01:53:44,844 INFO L390 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 0 case distinctions, treesize of input 181 treesize of output 160 [2022-11-03 01:53:44,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:53:44,858 INFO L356 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-03 01:53:44,859 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 98 [2022-11-03 01:53:44,868 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2022-11-03 01:53:45,061 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:45,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243930391] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:53:45,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1770120763] [2022-11-03 01:53:45,063 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:53:45,063 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:53:45,064 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:53:45,064 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:53:45,064 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:53:45,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:45,124 INFO L356 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2022-11-03 01:53:45,125 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 40 [2022-11-03 01:53:45,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:45,174 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 01:53:45,175 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 01:53:45,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:45,217 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 175 [2022-11-03 01:53:45,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:45,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:45,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:45,251 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 203 [2022-11-03 01:53:45,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:45,277 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 01:53:45,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:45,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:45,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:45,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:45,317 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 74 [2022-11-03 01:53:45,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:45,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:45,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:45,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:45,360 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 74 [2022-11-03 01:53:45,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:45,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:45,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:45,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:45,445 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 196 [2022-11-03 01:53:45,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:45,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:45,501 INFO L390 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 0 case distinctions, treesize of input 137 treesize of output 111 [2022-11-03 01:53:45,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:45,516 INFO L390 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 22 treesize of output 14 [2022-11-03 01:53:45,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:45,560 INFO L390 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 [2022-11-03 01:53:45,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:45,605 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 56 [2022-11-03 01:53:45,620 INFO L390 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 5 treesize of output 3 [2022-11-03 01:53:45,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:45,674 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-03 01:53:45,695 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 129 [2022-11-03 01:53:45,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:45,718 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-11-03 01:53:45,777 INFO L390 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 21 treesize of output 7 [2022-11-03 01:53:45,797 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 01:53:45,812 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 150 treesize of output 200 [2022-11-03 01:53:45,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:45,837 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-11-03 01:53:45,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:45,895 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 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 30 treesize of output 22 [2022-11-03 01:53:45,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:45,924 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 16 [2022-11-03 01:53:45,962 INFO L390 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 21 treesize of output 7 [2022-11-03 01:53:46,207 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:53:47,382 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3818#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:53:47,382 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:53:47,383 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:53:47,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 18] total 51 [2022-11-03 01:53:47,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367793640] [2022-11-03 01:53:47,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:53:47,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-03 01:53:47,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:53:47,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-03 01:53:47,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=3092, Unknown=0, NotChecked=0, Total=3306 [2022-11-03 01:53:47,385 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 51 states have internal predecessors, (103), 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) [2022-11-03 01:53:57,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:57,690 INFO L93 Difference]: Finished difference Result 101 states and 112 transitions. [2022-11-03 01:53:57,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-03 01:53:57,691 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 51 states have internal predecessors, (103), 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 36 [2022-11-03 01:53:57,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:57,692 INFO L225 Difference]: With dead ends: 101 [2022-11-03 01:53:57,692 INFO L226 Difference]: Without dead ends: 99 [2022-11-03 01:53:57,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3409 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=1286, Invalid=13476, Unknown=0, NotChecked=0, Total=14762 [2022-11-03 01:53:57,695 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 128 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 1376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:57,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 211 Invalid, 1376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 1002 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 01:53:57,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-03 01:53:57,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 40. [2022-11-03 01:53:57,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:57,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2022-11-03 01:53:57,717 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 36 [2022-11-03 01:53:57,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:57,717 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2022-11-03 01:53:57,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 51 states have internal predecessors, (103), 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) [2022-11-03 01:53:57,718 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2022-11-03 01:53:57,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-03 01:53:57,719 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:57,719 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 5, 1, 1, 1, 1, 1, 1] [2022-11-03 01:53:57,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:57,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:53:57,921 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:57,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:57,922 INFO L85 PathProgramCache]: Analyzing trace with hash -703991220, now seen corresponding path program 13 times [2022-11-03 01:53:57,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:53:57,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986241025] [2022-11-03 01:53:57,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:57,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:53:57,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:59,127 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:59,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:53:59,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986241025] [2022-11-03 01:53:59,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986241025] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:53:59,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170377774] [2022-11-03 01:53:59,128 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 01:53:59,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:53:59,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:53:59,129 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:53:59,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 01:53:59,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:59,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-03 01:53:59,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:59,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 43 [2022-11-03 01:53:59,446 INFO L390 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 0 case distinctions, treesize of input 18 treesize of output 7 [2022-11-03 01:53:59,450 INFO L390 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 7 treesize of output 3 [2022-11-03 01:54:00,144 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 37 [2022-11-03 01:54:00,208 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:00,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:54:00,940 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:54:00,941 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-11-03 01:54:00,978 INFO L390 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 0 case distinctions, treesize of input 50 treesize of output 34 [2022-11-03 01:54:00,992 INFO L356 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-03 01:54:00,993 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 14 [2022-11-03 01:54:01,001 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2022-11-03 01:54:01,037 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:01,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170377774] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:54:01,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2108698326] [2022-11-03 01:54:01,040 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:54:01,040 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:54:01,040 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:54:01,041 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:54:01,041 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:54:01,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:01,092 INFO L356 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2022-11-03 01:54:01,092 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 40 [2022-11-03 01:54:01,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:01,148 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 01:54:01,149 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 01:54:01,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:01,189 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 175 [2022-11-03 01:54:01,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:01,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:01,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:01,274 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 269 treesize of output 311 [2022-11-03 01:54:01,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:01,299 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 194 treesize of output 198 [2022-11-03 01:54:01,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:01,325 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 196 treesize of output 200 [2022-11-03 01:54:01,347 INFO L390 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 187 treesize of output 185 [2022-11-03 01:54:01,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:01,378 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 01:54:01,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:01,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:01,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:01,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:01,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:01,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:01,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:01,491 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 81 [2022-11-03 01:54:01,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:01,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:01,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:01,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:01,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:01,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:01,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:01,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:01,547 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 69 [2022-11-03 01:54:01,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:54:01,589 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:54:01,596 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 01:54:01,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:01,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:01,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:01,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:01,652 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 36 [2022-11-03 01:54:01,665 INFO L390 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 7 treesize of output 3 [2022-11-03 01:54:01,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:01,797 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-03 01:54:01,818 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 129 [2022-11-03 01:54:01,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:01,841 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-11-03 01:54:01,857 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 01:54:01,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:01,876 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 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 65 treesize of output 51 [2022-11-03 01:54:01,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:01,890 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2022-11-03 01:54:01,910 INFO L390 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 21 treesize of output 7 [2022-11-03 01:54:01,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:01,939 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 76 [2022-11-03 01:54:01,964 INFO L390 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 21 treesize of output 7 [2022-11-03 01:54:01,978 INFO L390 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 0 case distinctions, treesize of input 33 treesize of output 21 [2022-11-03 01:54:01,990 INFO L390 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 21 treesize of output 7 [2022-11-03 01:54:02,009 INFO L390 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 10 treesize of output 3 [2022-11-03 01:54:02,227 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:54:03,362 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4429#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:54:03,363 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:54:03,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:54:03,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 47 [2022-11-03 01:54:03,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609922212] [2022-11-03 01:54:03,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:54:03,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-03 01:54:03,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:54:03,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-03 01:54:03,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=2692, Unknown=0, NotChecked=0, Total=2862 [2022-11-03 01:54:03,365 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 47 states, 47 states have (on average 2.234042553191489) internal successors, (105), 47 states have internal predecessors, (105), 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) [2022-11-03 01:54:14,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:14,486 INFO L93 Difference]: Finished difference Result 134 states and 147 transitions. [2022-11-03 01:54:14,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-11-03 01:54:14,486 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.234042553191489) internal successors, (105), 47 states have internal predecessors, (105), 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 39 [2022-11-03 01:54:14,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:14,488 INFO L225 Difference]: With dead ends: 134 [2022-11-03 01:54:14,488 INFO L226 Difference]: Without dead ends: 132 [2022-11-03 01:54:14,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 80 SyntacticMatches, 3 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5224 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=1520, Invalid=17940, Unknown=0, NotChecked=0, Total=19460 [2022-11-03 01:54:14,491 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 129 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 1148 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 1562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 1148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:14,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 229 Invalid, 1562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 1148 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-03 01:54:14,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-11-03 01:54:14,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 43. [2022-11-03 01:54:14,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 42 states have internal predecessors, (44), 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) [2022-11-03 01:54:14,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2022-11-03 01:54:14,523 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 39 [2022-11-03 01:54:14,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:14,524 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2022-11-03 01:54:14,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.234042553191489) internal successors, (105), 47 states have internal predecessors, (105), 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) [2022-11-03 01:54:14,525 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2022-11-03 01:54:14,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-03 01:54:14,525 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:14,526 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 5, 1, 1, 1, 1, 1, 1] [2022-11-03 01:54:14,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-03 01:54:14,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-03 01:54:14,729 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:14,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:14,729 INFO L85 PathProgramCache]: Analyzing trace with hash -271851801, now seen corresponding path program 14 times [2022-11-03 01:54:14,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:54:14,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28246293] [2022-11-03 01:54:14,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:14,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:54:14,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:15,727 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 127 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:15,727 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:54:15,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28246293] [2022-11-03 01:54:15,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28246293] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:54:15,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120406459] [2022-11-03 01:54:15,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:54:15,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:54:15,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:54:15,729 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:54:15,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 01:54:16,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-03 01:54:16,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:54:16,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 01:54:16,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:17,098 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 155 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:17,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:54:17,704 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 155 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:17,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120406459] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:54:17,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1553509421] [2022-11-03 01:54:17,708 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:54:17,708 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:54:17,708 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:54:17,709 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:54:17,709 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:54:17,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:17,760 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 01:54:17,761 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 01:54:17,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:17,773 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 24 treesize of output 32 [2022-11-03 01:54:17,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:17,812 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 185 [2022-11-03 01:54:17,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:17,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:17,848 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 226 treesize of output 244 [2022-11-03 01:54:17,878 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-11-03 01:54:17,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:17,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:17,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:17,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:17,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:17,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:17,990 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 187 treesize of output 150 [2022-11-03 01:54:18,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:18,011 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 17 [2022-11-03 01:54:18,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:18,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:18,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:18,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:18,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:18,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:18,047 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 128 [2022-11-03 01:54:18,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:18,062 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2022-11-03 01:54:18,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:18,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:18,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:18,145 INFO L390 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 111 treesize of output 81 [2022-11-03 01:54:18,157 INFO L390 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 10 treesize of output 3 [2022-11-03 01:54:18,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:18,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:18,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:18,181 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 212 [2022-11-03 01:54:18,237 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 01:54:18,263 INFO L390 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 21 treesize of output 7 [2022-11-03 01:54:18,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:18,315 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-03 01:54:18,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:18,341 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 136 [2022-11-03 01:54:18,357 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 01:54:18,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:18,370 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 14 [2022-11-03 01:54:18,388 INFO L390 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 21 treesize of output 7 [2022-11-03 01:54:18,409 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 119 [2022-11-03 01:54:18,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:18,429 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-11-03 01:54:18,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:18,491 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2022-11-03 01:54:18,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:18,513 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 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 64 treesize of output 39 [2022-11-03 01:54:18,528 INFO L390 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 21 treesize of output 7 [2022-11-03 01:54:18,542 INFO L390 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 0 case distinctions, treesize of input 57 treesize of output 41 [2022-11-03 01:54:18,822 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:54:19,840 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5160#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:54:19,840 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:54:19,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:54:19,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 19] total 55 [2022-11-03 01:54:19,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127221356] [2022-11-03 01:54:19,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:54:19,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-03 01:54:19,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:54:19,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-03 01:54:19,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=696, Invalid=3086, Unknown=0, NotChecked=0, Total=3782 [2022-11-03 01:54:19,844 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 55 states, 55 states have (on average 2.1818181818181817) internal successors, (120), 55 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) [2022-11-03 01:54:20,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:20,581 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2022-11-03 01:54:20,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-03 01:54:20,582 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1818181818181817) internal successors, (120), 55 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) Word has length 42 [2022-11-03 01:54:20,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:20,583 INFO L225 Difference]: With dead ends: 80 [2022-11-03 01:54:20,583 INFO L226 Difference]: Without dead ends: 44 [2022-11-03 01:54:20,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2236 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1115, Invalid=4585, Unknown=0, NotChecked=0, Total=5700 [2022-11-03 01:54:20,585 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 98 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:20,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 103 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:54:20,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-03 01:54:20,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-11-03 01:54:20,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:20,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2022-11-03 01:54:20,612 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 42 [2022-11-03 01:54:20,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:20,612 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2022-11-03 01:54:20,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.1818181818181817) internal successors, (120), 55 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) [2022-11-03 01:54:20,613 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2022-11-03 01:54:20,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-03 01:54:20,614 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:20,614 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 6, 1, 1, 1, 1, 1, 1] [2022-11-03 01:54:20,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-03 01:54:20,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-03 01:54:20,819 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:20,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:20,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1760543031, now seen corresponding path program 15 times [2022-11-03 01:54:20,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:54:20,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137697612] [2022-11-03 01:54:20,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:20,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:54:20,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:22,429 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:22,429 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:54:22,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137697612] [2022-11-03 01:54:22,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137697612] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:54:22,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848139428] [2022-11-03 01:54:22,429 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:54:22,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:54:22,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:54:22,431 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:54:22,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-03 01:54:22,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:54:22,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:54:22,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-03 01:54:22,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:22,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:22,894 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 43 [2022-11-03 01:54:22,962 INFO L390 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 75 [2022-11-03 01:54:22,975 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 18 treesize of output 22 [2022-11-03 01:54:23,046 INFO L390 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 7 [2022-11-03 01:54:23,052 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 106 [2022-11-03 01:54:23,064 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 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 28 treesize of output 58 [2022-11-03 01:54:23,183 INFO L390 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 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-03 01:54:23,188 INFO L390 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 7 [2022-11-03 01:54:23,213 INFO L390 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 0 case distinctions, treesize of input 45 treesize of output 31 [2022-11-03 01:54:23,220 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 31 treesize of output 16 [2022-11-03 01:54:25,076 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:54:25,077 INFO L390 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 106 treesize of output 58 [2022-11-03 01:54:25,164 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:25,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:54:26,053 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:54:26,054 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-11-03 01:54:26,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:54:26,158 INFO L356 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-03 01:54:26,158 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 107 [2022-11-03 01:54:26,180 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2022-11-03 01:54:26,476 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:26,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848139428] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:54:26,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1515321950] [2022-11-03 01:54:26,479 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:54:26,479 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:54:26,480 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:54:26,480 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:54:26,480 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:54:26,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:26,526 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 01:54:26,526 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 01:54:26,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:26,539 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 24 treesize of output 32 [2022-11-03 01:54:26,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:26,576 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 175 [2022-11-03 01:54:26,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:26,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:26,610 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 199 [2022-11-03 01:54:26,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:26,636 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 01:54:26,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:26,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:26,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:26,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:26,683 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 66 [2022-11-03 01:54:26,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:26,699 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 38 treesize of output 14 [2022-11-03 01:54:26,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:26,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:26,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:26,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:26,739 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 66 [2022-11-03 01:54:26,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:26,760 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 38 treesize of output 14 [2022-11-03 01:54:26,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:26,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:26,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:26,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:26,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:26,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:26,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:26,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:26,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:26,882 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 196 [2022-11-03 01:54:26,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:26,894 INFO L390 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 [2022-11-03 01:54:26,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:26,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:26,952 INFO L390 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 0 case distinctions, treesize of input 133 treesize of output 107 [2022-11-03 01:54:26,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:26,966 INFO L390 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 17 treesize of output 11 [2022-11-03 01:54:27,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:27,042 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-03 01:54:27,064 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 129 [2022-11-03 01:54:27,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:27,088 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-11-03 01:54:27,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:27,114 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 16 [2022-11-03 01:54:27,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:27,142 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 16 [2022-11-03 01:54:27,160 INFO L390 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 0 case distinctions, treesize of input 33 treesize of output 21 [2022-11-03 01:54:27,170 INFO L390 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 21 treesize of output 7 [2022-11-03 01:54:27,188 INFO L390 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 68 [2022-11-03 01:54:27,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:27,209 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 76 [2022-11-03 01:54:27,222 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 01:54:27,239 INFO L390 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 30 treesize of output 16 [2022-11-03 01:54:27,257 INFO L390 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 10 treesize of output 3 [2022-11-03 01:54:27,273 INFO L390 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 10 treesize of output 3 [2022-11-03 01:54:27,491 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:54:28,736 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5679#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:54:28,736 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:54:28,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:54:28,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 21] total 60 [2022-11-03 01:54:28,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025987152] [2022-11-03 01:54:28,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:54:28,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-03 01:54:28,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:54:28,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-03 01:54:28,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=4178, Unknown=0, NotChecked=0, Total=4422 [2022-11-03 01:54:28,740 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 60 states, 60 states have (on average 2.066666666666667) internal successors, (124), 60 states have internal predecessors, (124), 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) [2022-11-03 01:54:49,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:49,936 INFO L93 Difference]: Finished difference Result 148 states and 162 transitions. [2022-11-03 01:54:49,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-11-03 01:54:49,937 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.066666666666667) internal successors, (124), 60 states have internal predecessors, (124), 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 43 [2022-11-03 01:54:49,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:49,938 INFO L225 Difference]: With dead ends: 148 [2022-11-03 01:54:49,938 INFO L226 Difference]: Without dead ends: 146 [2022-11-03 01:54:49,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6397 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=2006, Invalid=24400, Unknown=0, NotChecked=0, Total=26406 [2022-11-03 01:54:49,941 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 188 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 1550 mSolverCounterSat, 575 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 2125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 575 IncrementalHoareTripleChecker+Valid, 1550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:49,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 318 Invalid, 2125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [575 Valid, 1550 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-03 01:54:49,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-03 01:54:49,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 47. [2022-11-03 01:54:49,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 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) [2022-11-03 01:54:49,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2022-11-03 01:54:49,975 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 43 [2022-11-03 01:54:49,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:49,975 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2022-11-03 01:54:49,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.066666666666667) internal successors, (124), 60 states have internal predecessors, (124), 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) [2022-11-03 01:54:49,976 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2022-11-03 01:54:49,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-03 01:54:49,976 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:49,977 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 1, 1, 1, 1, 1, 1] [2022-11-03 01:54:50,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-03 01:54:50,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:54:50,177 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:50,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:50,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1808459082, now seen corresponding path program 16 times [2022-11-03 01:54:50,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:54:50,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253168945] [2022-11-03 01:54:50,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:50,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:54:50,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:51,569 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:51,570 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:54:51,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253168945] [2022-11-03 01:54:51,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253168945] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:54:51,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737487087] [2022-11-03 01:54:51,570 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 01:54:51,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:54:51,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:54:51,571 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:54:51,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-03 01:54:51,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:51,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-03 01:54:51,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:51,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:51,973 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 43 [2022-11-03 01:54:51,995 INFO L390 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 7 treesize of output 3 [2022-11-03 01:54:52,006 INFO L390 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 0 case distinctions, treesize of input 18 treesize of output 7 [2022-11-03 01:54:52,009 INFO L390 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 7 treesize of output 3 [2022-11-03 01:54:53,240 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 55 [2022-11-03 01:54:53,306 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:53,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:54:54,236 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:54:54,236 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-11-03 01:54:54,262 INFO L390 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 0 case distinctions, treesize of input 54 treesize of output 39 [2022-11-03 01:54:54,273 INFO L356 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-03 01:54:54,273 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2022-11-03 01:54:54,282 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2022-11-03 01:54:54,571 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:54:54,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737487087] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:54:54,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1129543264] [2022-11-03 01:54:54,573 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:54:54,573 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:54:54,573 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:54:54,574 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:54:54,574 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:54:54,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:54,617 INFO L356 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2022-11-03 01:54:54,617 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 40 [2022-11-03 01:54:54,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:54,663 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 01:54:54,663 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 01:54:54,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:54,704 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 175 [2022-11-03 01:54:54,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:54,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:54,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:54,778 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 248 treesize of output 296 [2022-11-03 01:54:54,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:54,802 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 173 treesize of output 177 [2022-11-03 01:54:54,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:54,826 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 175 treesize of output 179 [2022-11-03 01:54:54,845 INFO L390 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 166 treesize of output 164 [2022-11-03 01:54:54,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:54,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:54,872 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 01:54:54,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:54,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:54,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:54,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:54,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:54,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:54,981 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 90 [2022-11-03 01:54:55,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:55,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:55,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:55,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:55,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:55,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:55,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:55,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 84 [2022-11-03 01:54:55,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:55,294 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-03 01:54:55,313 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 129 [2022-11-03 01:54:55,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:55,335 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-11-03 01:54:55,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:55,395 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 16 [2022-11-03 01:54:55,423 INFO L390 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 21 treesize of output 7 [2022-11-03 01:54:55,444 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 195 treesize of output 240 [2022-11-03 01:54:55,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:55,467 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-11-03 01:54:55,491 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 01:54:55,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:54:55,521 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2022-11-03 01:54:55,596 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 247 treesize of output 254 [2022-11-03 01:54:55,631 INFO L390 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 21 treesize of output 7 [2022-11-03 01:54:55,971 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:54:57,285 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6488#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:54:57,285 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:54:57,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:54:57,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 22] total 63 [2022-11-03 01:54:57,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956106934] [2022-11-03 01:54:57,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:54:57,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-11-03 01:54:57,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:54:57,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-11-03 01:54:57,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=4576, Unknown=0, NotChecked=0, Total=4830 [2022-11-03 01:54:57,287 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 63 states, 63 states have (on average 2.111111111111111) internal successors, (133), 63 states have internal predecessors, (133), 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) [2022-11-03 01:55:20,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:20,956 INFO L93 Difference]: Finished difference Result 187 states and 203 transitions. [2022-11-03 01:55:20,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-11-03 01:55:20,957 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.111111111111111) internal successors, (133), 63 states have internal predecessors, (133), 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 46 [2022-11-03 01:55:20,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:20,958 INFO L225 Difference]: With dead ends: 187 [2022-11-03 01:55:20,958 INFO L226 Difference]: Without dead ends: 185 [2022-11-03 01:55:20,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9423 ImplicationChecksByTransitivity, 23.4s TimeCoverageRelationStatistics Valid=2666, Invalid=34006, Unknown=0, NotChecked=0, Total=36672 [2022-11-03 01:55:20,962 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 274 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 1898 mSolverCounterSat, 822 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 2720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 822 IncrementalHoareTripleChecker+Valid, 1898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:20,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 353 Invalid, 2720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [822 Valid, 1898 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-03 01:55:20,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-03 01:55:20,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 50. [2022-11-03 01:55:20,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 49 states have internal predecessors, (51), 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) [2022-11-03 01:55:20,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2022-11-03 01:55:20,997 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 46 [2022-11-03 01:55:20,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:20,997 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2022-11-03 01:55:20,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.111111111111111) internal successors, (133), 63 states have internal predecessors, (133), 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) [2022-11-03 01:55:20,998 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2022-11-03 01:55:20,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-03 01:55:20,999 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:20,999 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 6, 1, 1, 1, 1, 1, 1] [2022-11-03 01:55:21,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:21,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-03 01:55:21,207 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:21,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:21,207 INFO L85 PathProgramCache]: Analyzing trace with hash -259972311, now seen corresponding path program 17 times [2022-11-03 01:55:21,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:55:21,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384351154] [2022-11-03 01:55:21,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:21,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:55:21,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:22,306 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 188 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:22,306 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:55:22,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384351154] [2022-11-03 01:55:22,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384351154] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:55:22,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426797403] [2022-11-03 01:55:22,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:55:22,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:55:22,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:55:22,309 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:55:22,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-03 01:55:24,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-11-03 01:55:24,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:55:24,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 01:55:24,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:25,050 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 222 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:25,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:55:25,735 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 222 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:25,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426797403] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:55:25,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1749709375] [2022-11-03 01:55:25,737 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:55:25,738 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:55:25,738 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:55:25,738 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:55:25,738 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:55:25,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:25,785 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 01:55:25,785 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 01:55:25,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:25,798 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 24 treesize of output 32 [2022-11-03 01:55:25,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:25,835 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 175 [2022-11-03 01:55:25,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:25,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:25,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 195 treesize of output 217 [2022-11-03 01:55:25,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:25,895 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 01:55:26,011 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 01:55:26,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:26,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:26,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:26,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:26,055 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 58 [2022-11-03 01:55:26,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:26,073 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 12 [2022-11-03 01:55:26,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:26,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:26,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:26,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:26,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:26,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:26,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:26,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:26,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:26,111 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 196 [2022-11-03 01:55:26,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:26,122 INFO L390 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 [2022-11-03 01:55:26,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:26,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:26,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:26,156 INFO L390 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 140 treesize of output 112 [2022-11-03 01:55:26,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:26,169 INFO L390 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 [2022-11-03 01:55:26,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:26,280 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-03 01:55:26,299 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 129 [2022-11-03 01:55:26,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:26,322 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-11-03 01:55:26,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:26,341 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 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 74 treesize of output 58 [2022-11-03 01:55:26,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:26,369 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 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 74 treesize of output 58 [2022-11-03 01:55:26,412 INFO L390 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 21 treesize of output 7 [2022-11-03 01:55:26,427 INFO L390 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 0 case distinctions, treesize of input 21 treesize of output 10 [2022-11-03 01:55:26,437 INFO L390 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 10 treesize of output 3 [2022-11-03 01:55:26,453 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 01:55:26,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:26,465 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 76 [2022-11-03 01:55:26,478 INFO L390 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 0 case distinctions, treesize of input 33 treesize of output 21 [2022-11-03 01:55:26,488 INFO L390 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 21 treesize of output 7 [2022-11-03 01:55:26,509 INFO L390 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 21 treesize of output 7 [2022-11-03 01:55:26,705 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:55:27,749 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7426#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:55:27,749 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:55:27,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:55:27,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 22] total 64 [2022-11-03 01:55:27,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810583726] [2022-11-03 01:55:27,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:55:27,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-03 01:55:27,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:55:27,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-03 01:55:27,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=926, Invalid=4044, Unknown=0, NotChecked=0, Total=4970 [2022-11-03 01:55:27,752 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 64 states, 64 states have (on average 2.203125) internal successors, (141), 64 states have internal predecessors, (141), 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) [2022-11-03 01:55:28,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:28,575 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2022-11-03 01:55:28,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-03 01:55:28,575 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.203125) internal successors, (141), 64 states have internal predecessors, (141), 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 49 [2022-11-03 01:55:28,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:28,576 INFO L225 Difference]: With dead ends: 93 [2022-11-03 01:55:28,576 INFO L226 Difference]: Without dead ends: 51 [2022-11-03 01:55:28,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3009 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1469, Invalid=6013, Unknown=0, NotChecked=0, Total=7482 [2022-11-03 01:55:28,577 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 109 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:28,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 133 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:55:28,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-03 01:55:28,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-11-03 01:55:28,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 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) [2022-11-03 01:55:28,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2022-11-03 01:55:28,610 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 49 [2022-11-03 01:55:28,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:28,610 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2022-11-03 01:55:28,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.203125) internal successors, (141), 64 states have internal predecessors, (141), 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) [2022-11-03 01:55:28,611 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2022-11-03 01:55:28,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-03 01:55:28,611 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:28,611 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 7, 1, 1, 1, 1, 1, 1] [2022-11-03 01:55:28,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:28,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:55:28,812 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:28,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:28,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1725071097, now seen corresponding path program 18 times [2022-11-03 01:55:28,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:55:28,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719870865] [2022-11-03 01:55:28,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:28,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:55:28,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:31,518 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 0 proven. 250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:31,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:55:31,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719870865] [2022-11-03 01:55:31,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719870865] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:55:31,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266808711] [2022-11-03 01:55:31,520 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:55:31,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:55:31,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:55:31,521 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:55:31,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-03 01:55:31,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:55:31,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:55:31,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-03 01:55:31,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:32,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:32,016 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 43 [2022-11-03 01:55:32,096 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 101 [2022-11-03 01:55:32,103 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 99 [2022-11-03 01:55:32,111 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 94 [2022-11-03 01:55:32,119 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 18 treesize of output 22 [2022-11-03 01:55:32,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 30 treesize of output 9 [2022-11-03 01:55:32,209 INFO L390 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 0 case distinctions, treesize of input 45 treesize of output 29 [2022-11-03 01:55:32,227 INFO L390 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 7 treesize of output 3 [2022-11-03 01:55:32,238 INFO L390 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 0 case distinctions, treesize of input 47 treesize of output 31 [2022-11-03 01:55:32,244 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 7 [2022-11-03 01:55:32,249 INFO L390 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 7 treesize of output 3 [2022-11-03 01:55:33,592 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 45 [2022-11-03 01:55:33,650 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 0 proven. 250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:33,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:55:34,612 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:55:34,612 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-11-03 01:55:34,713 INFO L390 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 0 case distinctions, treesize of input 181 treesize of output 160 [2022-11-03 01:55:34,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:55:34,727 INFO L356 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-03 01:55:34,727 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 98 [2022-11-03 01:55:34,748 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2022-11-03 01:55:35,093 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 0 proven. 250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:55:35,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266808711] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:55:35,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [785567190] [2022-11-03 01:55:35,095 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:55:35,095 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:55:35,096 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:55:35,096 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:55:35,096 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:55:35,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:35,145 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 01:55:35,145 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 01:55:35,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:35,172 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 24 treesize of output 32 [2022-11-03 01:55:35,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:35,207 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 175 [2022-11-03 01:55:35,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:35,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:35,243 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 217 treesize of output 235 [2022-11-03 01:55:35,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:35,270 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 01:55:35,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:35,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:35,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:35,370 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 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 173 treesize of output 134 [2022-11-03 01:55:35,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:35,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:35,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:35,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:35,426 INFO L390 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 0 case distinctions, treesize of input 183 treesize of output 135 [2022-11-03 01:55:35,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:35,450 INFO L390 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 [2022-11-03 01:55:35,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:35,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:35,476 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 196 [2022-11-03 01:55:35,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:35,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:35,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:35,543 INFO L390 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 93 treesize of output 75 [2022-11-03 01:55:35,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:35,556 INFO L390 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 [2022-11-03 01:55:35,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:35,682 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-03 01:55:35,702 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 129 [2022-11-03 01:55:35,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:35,726 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-11-03 01:55:35,785 INFO L390 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 70 [2022-11-03 01:55:35,796 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 62 treesize of output 19 [2022-11-03 01:55:35,815 INFO L390 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 56 [2022-11-03 01:55:35,832 INFO L390 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 21 treesize of output 7 [2022-11-03 01:55:35,850 INFO L390 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 0 case distinctions, treesize of input 21 treesize of output 10 [2022-11-03 01:55:35,860 INFO L390 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 10 treesize of output 3 [2022-11-03 01:55:35,876 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 01:55:35,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:35,888 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 76 [2022-11-03 01:55:35,902 INFO L390 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 0 case distinctions, treesize of input 33 treesize of output 21 [2022-11-03 01:55:35,912 INFO L390 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 21 treesize of output 7 [2022-11-03 01:55:35,935 INFO L390 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 21 treesize of output 7 [2022-11-03 01:55:36,186 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:55:37,455 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8028#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:55:37,456 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:55:37,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:55:37,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 24] total 69 [2022-11-03 01:55:37,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615356707] [2022-11-03 01:55:37,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:55:37,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-11-03 01:55:37,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:55:37,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-11-03 01:55:37,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=5392, Unknown=0, NotChecked=0, Total=5700 [2022-11-03 01:55:37,458 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 69 states, 69 states have (on average 2.101449275362319) internal successors, (145), 69 states have internal predecessors, (145), 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) [2022-11-03 01:56:07,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:07,922 INFO L93 Difference]: Finished difference Result 204 states and 221 transitions. [2022-11-03 01:56:07,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-11-03 01:56:07,923 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.101449275362319) internal successors, (145), 69 states have internal predecessors, (145), 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 50 [2022-11-03 01:56:07,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:07,924 INFO L225 Difference]: With dead ends: 204 [2022-11-03 01:56:07,924 INFO L226 Difference]: Without dead ends: 202 [2022-11-03 01:56:07,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12014 ImplicationChecksByTransitivity, 29.9s TimeCoverageRelationStatistics Valid=2879, Invalid=41011, Unknown=0, NotChecked=0, Total=43890 [2022-11-03 01:56:07,927 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 248 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 1908 mSolverCounterSat, 775 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 2683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 775 IncrementalHoareTripleChecker+Valid, 1908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:07,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 386 Invalid, 2683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [775 Valid, 1908 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-11-03 01:56:07,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-11-03 01:56:07,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 54. [2022-11-03 01:56:07,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 53 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:56:07,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2022-11-03 01:56:07,983 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 50 [2022-11-03 01:56:07,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:07,984 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2022-11-03 01:56:07,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.101449275362319) internal successors, (145), 69 states have internal predecessors, (145), 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) [2022-11-03 01:56:07,984 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2022-11-03 01:56:07,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-03 01:56:07,985 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:07,985 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 7, 1, 1, 1, 1, 1, 1] [2022-11-03 01:56:08,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-03 01:56:08,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:08,189 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:56:08,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:08,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1990890060, now seen corresponding path program 19 times [2022-11-03 01:56:08,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:08,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789846002] [2022-11-03 01:56:08,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:08,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:08,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:09,834 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:56:09,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:09,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789846002] [2022-11-03 01:56:09,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789846002] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:56:09,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815749412] [2022-11-03 01:56:09,835 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 01:56:09,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:09,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:56:09,836 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:56:09,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-03 01:56:10,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:10,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-03 01:56:10,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:56:10,316 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 43 [2022-11-03 01:56:10,330 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-11-03 01:56:10,343 INFO L390 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 7 treesize of output 3 [2022-11-03 01:56:11,458 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 37 [2022-11-03 01:56:11,522 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:56:11,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:56:12,738 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:56:12,739 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-11-03 01:56:12,784 INFO L356 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-03 01:56:12,784 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 14 [2022-11-03 01:56:12,791 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2022-11-03 01:56:12,835 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:56:12,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815749412] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:56:12,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [448328732] [2022-11-03 01:56:12,837 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:56:12,837 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:56:12,838 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:56:12,838 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:56:12,838 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:56:12,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:12,895 INFO L356 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2022-11-03 01:56:12,896 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 40 [2022-11-03 01:56:12,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:12,941 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 01:56:12,941 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 01:56:12,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:12,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 175 [2022-11-03 01:56:13,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:13,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:13,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:13,087 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 234 treesize of output 286 [2022-11-03 01:56:13,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:13,114 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 173 treesize of output 177 [2022-11-03 01:56:13,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:13,140 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 175 treesize of output 179 [2022-11-03 01:56:13,162 INFO L390 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 166 treesize of output 164 [2022-11-03 01:56:13,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:13,189 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 01:56:13,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:13,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:13,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:13,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:13,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:13,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:13,554 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 90 [2022-11-03 01:56:13,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:13,567 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 38 treesize of output 14 [2022-11-03 01:56:13,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:13,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:13,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:13,613 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 317 treesize of output 302 [2022-11-03 01:56:13,628 INFO L390 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 287 treesize of output 283 [2022-11-03 01:56:13,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:13,667 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 296 treesize of output 312 [2022-11-03 01:56:13,716 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 01:56:13,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:13,767 INFO L390 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 [2022-11-03 01:56:13,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:13,818 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-03 01:56:13,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:13,847 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 136 [2022-11-03 01:56:13,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:13,864 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 17 [2022-11-03 01:56:13,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:13,884 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 17 [2022-11-03 01:56:13,918 INFO L390 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 21 treesize of output 7 [2022-11-03 01:56:13,929 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 176 [2022-11-03 01:56:13,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:13,952 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-11-03 01:56:13,980 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 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 82 treesize of output 74 [2022-11-03 01:56:14,009 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 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 82 treesize of output 74 [2022-11-03 01:56:14,044 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 01:56:14,057 INFO L390 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2022-11-03 01:56:14,068 INFO L390 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 21 treesize of output 7 [2022-11-03 01:56:14,314 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:56:15,686 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9043#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:56:15,686 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:56:15,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:56:15,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 63 [2022-11-03 01:56:15,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013034306] [2022-11-03 01:56:15,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:56:15,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-11-03 01:56:15,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:15,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-11-03 01:56:15,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=4610, Unknown=0, NotChecked=0, Total=4830 [2022-11-03 01:56:15,688 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 63 states, 63 states have (on average 2.3015873015873014) internal successors, (145), 63 states have internal predecessors, (145), 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) [2022-11-03 01:56:43,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:43,829 INFO L93 Difference]: Finished difference Result 249 states and 268 transitions. [2022-11-03 01:56:43,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2022-11-03 01:56:43,830 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.3015873015873014) internal successors, (145), 63 states have internal predecessors, (145), 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 53 [2022-11-03 01:56:43,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:43,831 INFO L225 Difference]: With dead ends: 249 [2022-11-03 01:56:43,831 INFO L226 Difference]: Without dead ends: 247 [2022-11-03 01:56:43,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16484 ImplicationChecksByTransitivity, 27.1s TimeCoverageRelationStatistics Valid=3295, Invalid=51227, Unknown=0, NotChecked=0, Total=54522 [2022-11-03 01:56:43,834 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 287 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 2129 mSolverCounterSat, 930 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 3059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 930 IncrementalHoareTripleChecker+Valid, 2129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:43,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 410 Invalid, 3059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [930 Valid, 2129 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-11-03 01:56:43,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-11-03 01:56:43,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 57. [2022-11-03 01:56:43,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 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) [2022-11-03 01:56:43,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2022-11-03 01:56:43,876 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 53 [2022-11-03 01:56:43,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:43,876 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2022-11-03 01:56:43,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.3015873015873014) internal successors, (145), 63 states have internal predecessors, (145), 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) [2022-11-03 01:56:43,877 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2022-11-03 01:56:43,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-03 01:56:43,878 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:43,878 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 7, 1, 1, 1, 1, 1, 1] [2022-11-03 01:56:43,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-03 01:56:44,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:44,085 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:56:44,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:44,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1407663847, now seen corresponding path program 20 times [2022-11-03 01:56:44,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:44,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625153252] [2022-11-03 01:56:44,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:44,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:44,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:45,510 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 261 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:56:45,510 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:45,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625153252] [2022-11-03 01:56:45,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625153252] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:56:45,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880999235] [2022-11-03 01:56:45,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:56:45,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:45,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:56:45,521 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:56:45,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-03 01:56:48,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-11-03 01:56:48,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:56:48,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 01:56:48,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:56:49,486 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 301 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:56:49,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:56:50,407 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 301 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:56:50,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880999235] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:56:50,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1867198966] [2022-11-03 01:56:50,409 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:56:50,409 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:56:50,410 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:56:50,410 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:56:50,410 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:56:50,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:50,457 INFO L356 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2022-11-03 01:56:50,457 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 40 [2022-11-03 01:56:50,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:50,505 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 01:56:50,505 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 01:56:50,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:50,544 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 175 [2022-11-03 01:56:50,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:50,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:50,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:50,648 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 199 treesize of output 261 [2022-11-03 01:56:50,670 INFO L390 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 120 treesize of output 118 [2022-11-03 01:56:50,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:50,691 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 129 treesize of output 133 [2022-11-03 01:56:50,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:50,719 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 131 treesize of output 135 [2022-11-03 01:56:50,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:50,748 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 01:56:50,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:50,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:50,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:50,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:50,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:50,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:50,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:50,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:50,856 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 85 [2022-11-03 01:56:50,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:50,873 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 12 [2022-11-03 01:56:50,898 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 01:56:50,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:50,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:50,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:50,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:50,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:50,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:50,952 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 44 [2022-11-03 01:56:50,967 INFO L390 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 7 treesize of output 3 [2022-11-03 01:56:51,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:51,114 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-03 01:56:51,132 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 129 [2022-11-03 01:56:51,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:51,155 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-11-03 01:56:51,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:51,174 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 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 74 treesize of output 58 [2022-11-03 01:56:51,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:51,201 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 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 74 treesize of output 58 [2022-11-03 01:56:51,248 INFO L390 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 21 treesize of output 7 [2022-11-03 01:56:51,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:51,262 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 76 [2022-11-03 01:56:51,275 INFO L390 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 0 case distinctions, treesize of input 42 treesize of output 30 [2022-11-03 01:56:51,284 INFO L390 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 30 treesize of output 16 [2022-11-03 01:56:51,303 INFO L390 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 40 treesize of output 19 [2022-11-03 01:56:51,326 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 01:56:51,328 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 01:56:51,344 INFO L390 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 10 treesize of output 3 [2022-11-03 01:56:51,590 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:56:52,780 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10212#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:56:52,780 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:56:52,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:56:52,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 25] total 73 [2022-11-03 01:56:52,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281227354] [2022-11-03 01:56:52,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:56:52,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-11-03 01:56:52,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:52,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-11-03 01:56:52,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1190, Invalid=5130, Unknown=0, NotChecked=0, Total=6320 [2022-11-03 01:56:52,784 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 73 states, 73 states have (on average 2.219178082191781) internal successors, (162), 73 states have internal predecessors, (162), 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) [2022-11-03 01:56:53,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:53,911 INFO L93 Difference]: Finished difference Result 106 states and 108 transitions. [2022-11-03 01:56:53,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-03 01:56:53,912 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.219178082191781) internal successors, (162), 73 states have internal predecessors, (162), 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 56 [2022-11-03 01:56:53,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:53,915 INFO L225 Difference]: With dead ends: 106 [2022-11-03 01:56:53,915 INFO L226 Difference]: Without dead ends: 58 [2022-11-03 01:56:53,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3894 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1873, Invalid=7633, Unknown=0, NotChecked=0, Total=9506 [2022-11-03 01:56:53,918 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 131 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:53,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 155 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:56:53,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-03 01:56:53,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-11-03 01:56:53,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 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) [2022-11-03 01:56:53,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2022-11-03 01:56:53,966 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 56 [2022-11-03 01:56:53,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:53,967 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2022-11-03 01:56:53,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.219178082191781) internal successors, (162), 73 states have internal predecessors, (162), 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) [2022-11-03 01:56:53,968 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2022-11-03 01:56:53,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-03 01:56:53,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:53,969 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 8, 1, 1, 1, 1, 1, 1] [2022-11-03 01:56:54,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-03 01:56:54,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:54,177 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:56:54,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:54,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1270011063, now seen corresponding path program 21 times [2022-11-03 01:56:54,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:54,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293033108] [2022-11-03 01:56:54,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:54,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:54,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:56,467 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:56:56,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:56,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293033108] [2022-11-03 01:56:56,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293033108] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:56:56,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892488768] [2022-11-03 01:56:56,468 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:56:56,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:56,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:56:56,472 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:56:56,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-03 01:56:56,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:56:56,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:56:56,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-03 01:56:56,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:56:57,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:56:57,160 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 43 [2022-11-03 01:56:57,241 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 101 [2022-11-03 01:56:57,248 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 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 67 treesize of output 89 [2022-11-03 01:56:57,257 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 18 treesize of output 22 [2022-11-03 01:56:57,332 INFO L390 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 7 treesize of output 3 [2022-11-03 01:56:57,346 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2022-11-03 01:56:57,377 INFO L390 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 0 case distinctions, treesize of input 18 treesize of output 7 [2022-11-03 01:56:57,381 INFO L390 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 7 treesize of output 3 [2022-11-03 01:56:59,233 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 45 [2022-11-03 01:56:59,313 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:56:59,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:57:00,705 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:57:00,705 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-11-03 01:57:00,802 INFO L390 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 0 case distinctions, treesize of input 181 treesize of output 160 [2022-11-03 01:57:00,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:57:00,816 INFO L356 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-03 01:57:00,816 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 98 [2022-11-03 01:57:00,836 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2022-11-03 01:57:01,314 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:01,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892488768] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:57:01,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [362162827] [2022-11-03 01:57:01,316 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:57:01,316 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:57:01,316 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:57:01,317 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:57:01,317 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:57:01,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:01,370 INFO L356 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2022-11-03 01:57:01,371 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 40 [2022-11-03 01:57:01,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:01,417 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 01:57:01,417 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 01:57:01,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:01,461 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 175 [2022-11-03 01:57:01,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:01,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:01,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:01,557 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 262 treesize of output 306 [2022-11-03 01:57:01,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:01,581 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 194 treesize of output 198 [2022-11-03 01:57:01,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:01,606 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 196 treesize of output 200 [2022-11-03 01:57:01,626 INFO L390 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 187 treesize of output 185 [2022-11-03 01:57:01,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:01,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:01,655 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 01:57:01,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:01,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:01,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:01,925 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 289 treesize of output 294 [2022-11-03 01:57:01,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:01,943 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 235 treesize of output 237 [2022-11-03 01:57:01,961 INFO L390 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 222 treesize of output 218 [2022-11-03 01:57:02,053 INFO L390 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 11 treesize of output 7 [2022-11-03 01:57:02,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:02,071 INFO L390 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 [2022-11-03 01:57:02,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:02,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:02,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:02,198 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 92 [2022-11-03 01:57:02,208 INFO L390 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 7 treesize of output 3 [2022-11-03 01:57:02,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:02,313 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-03 01:57:02,332 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 129 [2022-11-03 01:57:02,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:02,356 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-11-03 01:57:02,416 INFO L390 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 21 treesize of output 7 [2022-11-03 01:57:02,444 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 62 treesize of output 19 [2022-11-03 01:57:02,456 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 197 treesize of output 242 [2022-11-03 01:57:02,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:02,482 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-11-03 01:57:02,548 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 56 treesize of output 17 [2022-11-03 01:57:02,560 INFO L390 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 21 treesize of output 7 [2022-11-03 01:57:02,588 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 62 treesize of output 19 [2022-11-03 01:57:02,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:57:02,609 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 157 treesize of output 172 [2022-11-03 01:57:02,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:57:02,647 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2022-11-03 01:57:02,661 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-11-03 01:57:02,922 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:57:04,490 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10897#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:57:04,490 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:57:04,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:57:04,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 27] total 78 [2022-11-03 01:57:04,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713352773] [2022-11-03 01:57:04,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:57:04,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-11-03 01:57:04,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:57:04,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-11-03 01:57:04,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=6830, Unknown=0, NotChecked=0, Total=7140 [2022-11-03 01:57:04,493 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 78 states, 78 states have (on average 2.128205128205128) internal successors, (166), 78 states have internal predecessors, (166), 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) [2022-11-03 01:57:50,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:50,817 INFO L93 Difference]: Finished difference Result 269 states and 289 transitions. [2022-11-03 01:57:50,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 183 states. [2022-11-03 01:57:50,818 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.128205128205128) internal successors, (166), 78 states have internal predecessors, (166), 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 57 [2022-11-03 01:57:50,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:50,819 INFO L225 Difference]: With dead ends: 269 [2022-11-03 01:57:50,819 INFO L226 Difference]: Without dead ends: 267 [2022-11-03 01:57:50,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18849 ImplicationChecksByTransitivity, 45.2s TimeCoverageRelationStatistics Valid=4126, Invalid=64780, Unknown=0, NotChecked=0, Total=68906 [2022-11-03 01:57:50,824 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 398 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 2699 mSolverCounterSat, 1218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 3917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1218 IncrementalHoareTripleChecker+Valid, 2699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:50,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [398 Valid, 514 Invalid, 3917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1218 Valid, 2699 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-11-03 01:57:50,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-11-03 01:57:50,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 61. [2022-11-03 01:57:50,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 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) [2022-11-03 01:57:50,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2022-11-03 01:57:50,885 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 57 [2022-11-03 01:57:50,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:50,885 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2022-11-03 01:57:50,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.128205128205128) internal successors, (166), 78 states have internal predecessors, (166), 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) [2022-11-03 01:57:50,886 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2022-11-03 01:57:50,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 01:57:50,886 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:50,886 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 8, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:50,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:51,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-03 01:57:51,087 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:51,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:51,087 INFO L85 PathProgramCache]: Analyzing trace with hash -527390518, now seen corresponding path program 22 times [2022-11-03 01:57:51,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:57:51,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837670870] [2022-11-03 01:57:51,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:51,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:57:51,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:53,111 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:53,112 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:57:53,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837670870] [2022-11-03 01:57:53,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837670870] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:57:53,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855406399] [2022-11-03 01:57:53,113 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 01:57:53,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:53,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:57:53,114 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:57:53,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-03 01:57:53,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:53,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-03 01:57:53,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:53,683 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 43 [2022-11-03 01:57:53,696 INFO L390 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 0 case distinctions, treesize of input 18 treesize of output 7 [2022-11-03 01:57:53,700 INFO L390 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 7 treesize of output 3 [2022-11-03 01:57:55,102 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 37 [2022-11-03 01:57:55,173 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:55,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:57:56,710 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:57:56,711 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-11-03 01:57:56,777 INFO L356 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-03 01:57:56,778 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2022-11-03 01:57:56,785 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2022-11-03 01:57:56,834 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:56,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855406399] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:57:56,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [586034043] [2022-11-03 01:57:56,837 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:57:56,837 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:57:56,838 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:57:56,838 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:57:56,838 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:57:56,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:56,884 INFO L356 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2022-11-03 01:57:56,884 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 40 [2022-11-03 01:57:56,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:56,928 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 01:57:56,929 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 01:57:56,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:56,976 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 185 [2022-11-03 01:57:57,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:57,011 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 241 treesize of output 257 [2022-11-03 01:57:57,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-11-03 01:57:57,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:57,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:57,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:57,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:57,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:57,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:57,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 69 [2022-11-03 01:57:57,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:57,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:57,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:57,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:57,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:57,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:57,173 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 65 [2022-11-03 01:57:57,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:57,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:57,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:57,215 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 212 [2022-11-03 01:57:57,226 INFO L390 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 21 treesize of output 7 [2022-11-03 01:57:57,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:57,279 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 116 [2022-11-03 01:57:57,291 INFO L390 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 40 treesize of output 19 [2022-11-03 01:57:57,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:57,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:57,357 INFO L390 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 0 case distinctions, treesize of input 95 treesize of output 65 [2022-11-03 01:57:57,372 INFO L390 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 10 treesize of output 3 [2022-11-03 01:57:57,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:57,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-03 01:57:57,445 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 129 [2022-11-03 01:57:57,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:57,468 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-11-03 01:57:57,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:57,492 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 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 74 treesize of output 60 [2022-11-03 01:57:57,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:57,505 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 16 [2022-11-03 01:57:57,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:57,526 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 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 74 treesize of output 60 [2022-11-03 01:57:57,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:57,539 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 16 [2022-11-03 01:57:57,575 INFO L390 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 21 treesize of output 7 [2022-11-03 01:57:57,605 INFO L390 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 10 treesize of output 3 [2022-11-03 01:57:57,616 INFO L390 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 0 case distinctions, treesize of input 21 treesize of output 10 [2022-11-03 01:57:57,625 INFO L390 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 10 treesize of output 3 [2022-11-03 01:57:57,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:57,638 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 76 [2022-11-03 01:57:57,658 INFO L390 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 30 treesize of output 16 [2022-11-03 01:57:57,676 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 01:57:57,891 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:57:59,427 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12150#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:57:59,427 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:57:59,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:57:59,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 71 [2022-11-03 01:57:59,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864953590] [2022-11-03 01:57:59,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:57:59,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-11-03 01:57:59,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:57:59,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-11-03 01:57:59,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=5761, Unknown=0, NotChecked=0, Total=6006 [2022-11-03 01:57:59,430 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 71 states, 71 states have (on average 2.323943661971831) internal successors, (165), 71 states have internal predecessors, (165), 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) [2022-11-03 01:58:44,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:44,197 INFO L93 Difference]: Finished difference Result 320 states and 342 transitions. [2022-11-03 01:58:44,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 217 states. [2022-11-03 01:58:44,198 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.323943661971831) internal successors, (165), 71 states have internal predecessors, (165), 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 60 [2022-11-03 01:58:44,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:44,200 INFO L225 Difference]: With dead ends: 320 [2022-11-03 01:58:44,200 INFO L226 Difference]: Without dead ends: 318 [2022-11-03 01:58:44,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 128 SyntacticMatches, 3 SemanticMatches, 288 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26530 ImplicationChecksByTransitivity, 42.8s TimeCoverageRelationStatistics Valid=4536, Invalid=79274, Unknown=0, NotChecked=0, Total=83810 [2022-11-03 01:58:44,207 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 283 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 2647 mSolverCounterSat, 1032 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 3679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1032 IncrementalHoareTripleChecker+Valid, 2647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:44,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 472 Invalid, 3679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1032 Valid, 2647 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-11-03 01:58:44,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-11-03 01:58:44,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 64. [2022-11-03 01:58:44,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 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) [2022-11-03 01:58:44,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2022-11-03 01:58:44,275 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 60 [2022-11-03 01:58:44,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:44,275 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2022-11-03 01:58:44,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.323943661971831) internal successors, (165), 71 states have internal predecessors, (165), 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) [2022-11-03 01:58:44,275 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2022-11-03 01:58:44,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 01:58:44,276 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:44,276 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 8, 1, 1, 1, 1, 1, 1] [2022-11-03 01:58:44,312 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-11-03 01:58:44,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-03 01:58:44,489 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:44,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:44,489 INFO L85 PathProgramCache]: Analyzing trace with hash -495276119, now seen corresponding path program 23 times [2022-11-03 01:58:44,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:58:44,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420530091] [2022-11-03 01:58:44,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:44,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:58:44,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:46,048 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 346 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:46,048 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:58:46,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420530091] [2022-11-03 01:58:46,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420530091] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:58:46,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984017619] [2022-11-03 01:58:46,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:58:46,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:58:46,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:58:46,050 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:58:46,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-03 01:58:56,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-11-03 01:58:56,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:58:56,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 01:58:56,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:58,256 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 392 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:58,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:58:59,356 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 392 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:59,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984017619] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:58:59,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [753389160] [2022-11-03 01:58:59,359 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:58:59,359 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:58:59,359 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:58:59,359 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:58:59,360 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:58:59,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:59,454 INFO L356 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2022-11-03 01:58:59,455 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 40 [2022-11-03 01:58:59,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:59,508 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 01:58:59,508 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 01:58:59,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:59,560 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 175 [2022-11-03 01:58:59,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:59,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:59,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:59,600 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 212 [2022-11-03 01:58:59,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:59,631 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 01:58:59,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:59,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:59,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:59,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:59,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:59,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:59,675 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 125 [2022-11-03 01:58:59,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:59,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:59,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:59,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:59,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:59,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:59,736 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 125 [2022-11-03 01:58:59,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:59,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:59,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:59,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:59,861 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 196 [2022-11-03 01:58:59,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:59,873 INFO L390 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 [2022-11-03 01:58:59,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:59,942 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 106 [2022-11-03 01:58:59,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:59,957 INFO L390 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 22 treesize of output 14 [2022-11-03 01:59:00,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:00,022 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-03 01:59:00,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:00,049 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 136 [2022-11-03 01:59:00,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:00,114 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 17 [2022-11-03 01:59:00,129 INFO L390 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 21 treesize of output 7 [2022-11-03 01:59:00,143 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 177 [2022-11-03 01:59:00,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:00,166 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-11-03 01:59:00,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:00,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:00,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:00,223 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:59:00,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:00,238 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 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 17 treesize of output 8 [2022-11-03 01:59:00,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:00,273 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 16 [2022-11-03 01:59:00,294 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 01:59:00,333 INFO L390 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 21 treesize of output 7 [2022-11-03 01:59:00,359 INFO L390 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 21 treesize of output 7 [2022-11-03 01:59:00,587 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:59:01,846 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13573#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:59:01,846 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:59:01,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:59:01,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 28] total 81 [2022-11-03 01:59:01,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790546227] [2022-11-03 01:59:01,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:59:01,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-11-03 01:59:01,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:59:01,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-11-03 01:59:01,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1453, Invalid=6203, Unknown=0, NotChecked=0, Total=7656 [2022-11-03 01:59:01,849 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 81 states, 81 states have (on average 2.246913580246914) internal successors, (182), 81 states have internal predecessors, (182), 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) [2022-11-03 01:59:03,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:03,118 INFO L93 Difference]: Finished difference Result 119 states and 121 transitions. [2022-11-03 01:59:03,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-03 01:59:03,119 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.246913580246914) internal successors, (182), 81 states have internal predecessors, (182), 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 63 [2022-11-03 01:59:03,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:03,119 INFO L225 Difference]: With dead ends: 119 [2022-11-03 01:59:03,120 INFO L226 Difference]: Without dead ends: 65 [2022-11-03 01:59:03,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4839 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2272, Invalid=9284, Unknown=0, NotChecked=0, Total=11556 [2022-11-03 01:59:03,122 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 117 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:03,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 168 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:59:03,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-03 01:59:03,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-11-03 01:59:03,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 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) [2022-11-03 01:59:03,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2022-11-03 01:59:03,182 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 63 [2022-11-03 01:59:03,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:03,182 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2022-11-03 01:59:03,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.246913580246914) internal successors, (182), 81 states have internal predecessors, (182), 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) [2022-11-03 01:59:03,183 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2022-11-03 01:59:03,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-03 01:59:03,184 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:03,184 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 9, 1, 1, 1, 1, 1, 1] [2022-11-03 01:59:03,235 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-11-03 01:59:03,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:59:03,397 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:03,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:03,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1878626041, now seen corresponding path program 24 times [2022-11-03 01:59:03,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:59:03,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80119732] [2022-11-03 01:59:03,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:03,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:59:03,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:05,724 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 0 proven. 437 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:05,724 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:59:05,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80119732] [2022-11-03 01:59:05,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80119732] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:59:05,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471280605] [2022-11-03 01:59:05,724 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:59:05,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:59:05,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:59:05,726 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:59:05,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-03 01:59:06,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:59:06,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:59:06,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-03 01:59:06,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:06,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:06,553 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 43 [2022-11-03 01:59:06,639 INFO L390 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 98 [2022-11-03 01:59:06,649 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 81 [2022-11-03 01:59:06,662 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 18 treesize of output 22 [2022-11-03 01:59:06,676 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 31 treesize of output 11 [2022-11-03 01:59:06,691 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 38 treesize of output 14 [2022-11-03 01:59:06,754 INFO L390 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 7 [2022-11-03 01:59:06,777 INFO L390 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 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-03 01:59:06,784 INFO L390 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 7 [2022-11-03 01:59:06,790 INFO L390 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 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-03 01:59:06,794 INFO L390 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 7 [2022-11-03 01:59:10,347 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:59:10,347 INFO L390 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 106 treesize of output 58 [2022-11-03 01:59:10,425 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 0 proven. 437 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:10,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:59:12,130 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:59:12,131 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-11-03 01:59:12,219 INFO L390 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 0 case distinctions, treesize of input 120 treesize of output 107 [2022-11-03 01:59:12,222 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:59:12,232 INFO L356 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-03 01:59:12,232 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 93 [2022-11-03 01:59:12,254 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2022-11-03 01:59:12,883 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 0 proven. 437 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:12,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471280605] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:59:12,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1170880454] [2022-11-03 01:59:12,884 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:59:12,884 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:59:12,885 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:59:12,885 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:59:12,885 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:59:12,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:12,941 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 01:59:12,941 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 01:59:12,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:12,954 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 24 treesize of output 32 [2022-11-03 01:59:12,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:13,001 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 185 [2022-11-03 01:59:13,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:13,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:13,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:13,037 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 216 treesize of output 238 [2022-11-03 01:59:13,064 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-11-03 01:59:13,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:13,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:13,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:13,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:13,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:13,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:13,101 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 157 [2022-11-03 01:59:13,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:13,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:13,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:13,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:13,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:13,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:13,166 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 157 [2022-11-03 01:59:13,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:13,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:13,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:13,313 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 212 [2022-11-03 01:59:13,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:13,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:13,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:13,376 INFO L390 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 97 treesize of output 79 [2022-11-03 01:59:13,388 INFO L390 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 21 treesize of output 7 [2022-11-03 01:59:13,419 INFO L390 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 21 treesize of output 7 [2022-11-03 01:59:13,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:13,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:13,449 INFO L390 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 0 case distinctions, treesize of input 136 treesize of output 100 [2022-11-03 01:59:13,461 INFO L390 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 10 treesize of output 3 [2022-11-03 01:59:13,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:13,551 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-03 01:59:13,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:13,578 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 136 [2022-11-03 01:59:13,597 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 56 treesize of output 17 [2022-11-03 01:59:13,616 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 56 treesize of output 17 [2022-11-03 01:59:13,633 INFO L390 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 21 treesize of output 7 [2022-11-03 01:59:13,657 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 177 [2022-11-03 01:59:13,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:13,681 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-11-03 01:59:13,766 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 01:59:13,801 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 279 treesize of output 309 [2022-11-03 01:59:13,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:13,916 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 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 35 treesize of output 18 [2022-11-03 01:59:13,931 INFO L390 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 21 treesize of output 7 [2022-11-03 01:59:13,950 INFO L390 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 21 treesize of output 7 [2022-11-03 01:59:13,975 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2022-11-03 01:59:14,186 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:59:15,922 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14341#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 01:59:15,922 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:59:15,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:59:15,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 30] total 87 [2022-11-03 01:59:15,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30033396] [2022-11-03 01:59:15,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:59:15,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-11-03 01:59:15,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:59:15,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-11-03 01:59:15,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=8399, Unknown=0, NotChecked=0, Total=8742 [2022-11-03 01:59:15,925 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 87 states, 87 states have (on average 2.1494252873563218) internal successors, (187), 87 states have internal predecessors, (187), 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) [2022-11-03 02:00:28,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:28,397 INFO L93 Difference]: Finished difference Result 343 states and 366 transitions. [2022-11-03 02:00:28,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 233 states. [2022-11-03 02:00:28,398 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.1494252873563218) internal successors, (187), 87 states have internal predecessors, (187), 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 64 [2022-11-03 02:00:28,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:28,400 INFO L225 Difference]: With dead ends: 343 [2022-11-03 02:00:28,400 INFO L226 Difference]: Without dead ends: 341 [2022-11-03 02:00:28,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 320 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29724 ImplicationChecksByTransitivity, 70.7s TimeCoverageRelationStatistics Valid=5573, Invalid=97789, Unknown=0, NotChecked=0, Total=103362 [2022-11-03 02:00:28,404 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 629 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 3281 mSolverCounterSat, 1836 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 629 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 5117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1836 IncrementalHoareTripleChecker+Valid, 3281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:28,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [629 Valid, 629 Invalid, 5117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1836 Valid, 3281 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2022-11-03 02:00:28,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-11-03 02:00:28,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 68. [2022-11-03 02:00:28,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 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) [2022-11-03 02:00:28,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2022-11-03 02:00:28,474 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 64 [2022-11-03 02:00:28,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:28,474 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2022-11-03 02:00:28,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.1494252873563218) internal successors, (187), 87 states have internal predecessors, (187), 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) [2022-11-03 02:00:28,475 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2022-11-03 02:00:28,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 02:00:28,475 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:28,475 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 9, 1, 1, 1, 1, 1, 1] [2022-11-03 02:00:28,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-03 02:00:28,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-03 02:00:28,676 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:00:28,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:28,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1575723596, now seen corresponding path program 25 times [2022-11-03 02:00:28,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:00:28,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063775118] [2022-11-03 02:00:28,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:28,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:00:28,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:30,559 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 0 proven. 487 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:30,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:00:30,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063775118] [2022-11-03 02:00:30,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063775118] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:00:30,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518301849] [2022-11-03 02:00:30,560 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:00:30,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:30,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:00:30,561 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:00:30,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-03 02:00:30,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:30,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-03 02:00:30,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:31,201 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 43 [2022-11-03 02:00:31,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-11-03 02:00:31,237 INFO L390 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 7 treesize of output 3 [2022-11-03 02:00:32,781 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 37 [2022-11-03 02:00:32,850 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 0 proven. 487 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:32,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:00:34,302 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:00:34,303 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-11-03 02:00:34,331 INFO L356 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-03 02:00:34,331 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 35 [2022-11-03 02:00:34,383 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 0 proven. 487 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:34,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518301849] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:00:34,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1227251761] [2022-11-03 02:00:34,384 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 02:00:34,385 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:00:34,385 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:00:34,385 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:00:34,385 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:00:34,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:34,426 INFO L356 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2022-11-03 02:00:34,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 40 [2022-11-03 02:00:34,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:34,461 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 02:00:34,461 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 02:00:34,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:34,494 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 185 [2022-11-03 02:00:34,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:34,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:34,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:34,559 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 322 treesize of output 358 [2022-11-03 02:00:34,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 233 treesize of output 237 [2022-11-03 02:00:34,596 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 235 treesize of output 239 [2022-11-03 02:00:34,615 INFO L390 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 223 treesize of output 216 [2022-11-03 02:00:34,636 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-11-03 02:00:34,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:34,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:34,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:34,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:34,735 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 136 [2022-11-03 02:00:34,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:34,752 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 16 [2022-11-03 02:00:34,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:34,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:34,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:34,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:34,790 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 205 treesize of output 163 [2022-11-03 02:00:34,816 INFO L390 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 21 treesize of output 7 [2022-11-03 02:00:35,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:35,019 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-03 02:00:35,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:35,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 136 [2022-11-03 02:00:35,056 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 56 treesize of output 17 [2022-11-03 02:00:35,071 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 56 treesize of output 17 [2022-11-03 02:00:35,094 INFO L390 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 21 treesize of output 7 [2022-11-03 02:00:35,104 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 177 [2022-11-03 02:00:35,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:35,128 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-11-03 02:00:35,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:35,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:35,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:35,214 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2022-11-03 02:00:35,237 INFO L390 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 21 treesize of output 7 [2022-11-03 02:00:35,254 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:00:35,263 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-11-03 02:00:35,272 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 62 treesize of output 19 [2022-11-03 02:00:35,445 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:00:36,749 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15856#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 02:00:36,749 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:00:36,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:00:36,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 79 [2022-11-03 02:00:36,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106360544] [2022-11-03 02:00:36,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:00:36,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-11-03 02:00:36,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:36,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-11-03 02:00:36,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=7040, Unknown=0, NotChecked=0, Total=7310 [2022-11-03 02:00:36,751 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 79 states, 79 states have (on average 2.3417721518987342) internal successors, (185), 79 states have internal predecessors, (185), 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) [2022-11-03 02:01:36,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:36,053 INFO L93 Difference]: Finished difference Result 400 states and 425 transitions. [2022-11-03 02:01:36,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 271 states. [2022-11-03 02:01:36,054 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.3417721518987342) internal successors, (185), 79 states have internal predecessors, (185), 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 67 [2022-11-03 02:01:36,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:36,056 INFO L225 Difference]: With dead ends: 400 [2022-11-03 02:01:36,056 INFO L226 Difference]: Without dead ends: 398 [2022-11-03 02:01:36,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 144 SyntacticMatches, 3 SemanticMatches, 350 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40661 ImplicationChecksByTransitivity, 55.6s TimeCoverageRelationStatistics Valid=6032, Invalid=117520, Unknown=0, NotChecked=0, Total=123552 [2022-11-03 02:01:36,062 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 485 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 3601 mSolverCounterSat, 1596 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 5197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1596 IncrementalHoareTripleChecker+Valid, 3601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:36,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [485 Valid, 637 Invalid, 5197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1596 Valid, 3601 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2022-11-03 02:01:36,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-11-03 02:01:36,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 71. [2022-11-03 02:01:36,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 70 states have internal predecessors, (72), 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) [2022-11-03 02:01:36,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2022-11-03 02:01:36,152 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 67 [2022-11-03 02:01:36,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:36,152 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2022-11-03 02:01:36,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.3417721518987342) internal successors, (185), 79 states have internal predecessors, (185), 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) [2022-11-03 02:01:36,152 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2022-11-03 02:01:36,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-03 02:01:36,153 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:36,153 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 9, 1, 1, 1, 1, 1, 1] [2022-11-03 02:01:36,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-03 02:01:36,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-03 02:01:36,361 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:36,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:36,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1605619993, now seen corresponding path program 26 times [2022-11-03 02:01:36,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:01:36,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588281572] [2022-11-03 02:01:36,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:36,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:01:36,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:38,006 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 443 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:38,006 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:01:38,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588281572] [2022-11-03 02:01:38,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588281572] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:01:38,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595074992] [2022-11-03 02:01:38,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:01:38,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:01:38,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:01:38,009 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:01:38,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-03 02:02:26,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-11-03 02:02:26,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:02:26,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 02:02:26,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:28,395 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 495 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:28,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:29,537 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 495 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:29,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595074992] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:29,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [880189443] [2022-11-03 02:02:29,538 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 02:02:29,539 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:02:29,539 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:02:29,539 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:02:29,539 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:02:29,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:29,577 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 02:02:29,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 02:02:29,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:29,587 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 24 treesize of output 32 [2022-11-03 02:02:29,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:29,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 175 [2022-11-03 02:02:29,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:29,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:29,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:29,678 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 248 treesize of output 296 [2022-11-03 02:02:29,695 INFO L390 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 162 treesize of output 160 [2022-11-03 02:02:29,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:29,714 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 171 treesize of output 175 [2022-11-03 02:02:29,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:29,735 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 173 treesize of output 177 [2022-11-03 02:02:29,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:29,758 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 02:02:29,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:29,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:29,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:29,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:29,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:29,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:29,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:29,874 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 76 [2022-11-03 02:02:29,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:29,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:29,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:29,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:29,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:29,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:29,911 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 90 [2022-11-03 02:02:29,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:29,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:29,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:29,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:29,961 INFO L390 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 0 case distinctions, treesize of input 74 treesize of output 48 [2022-11-03 02:02:29,971 INFO L390 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 7 treesize of output 3 [2022-11-03 02:02:29,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:29,994 INFO L390 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 [2022-11-03 02:02:30,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:30,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:30,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:30,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 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 96 treesize of output 66 [2022-11-03 02:02:30,054 INFO L390 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 7 treesize of output 3 [2022-11-03 02:02:30,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:30,164 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-03 02:02:30,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:30,185 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 136 [2022-11-03 02:02:30,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:30,199 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 14 [2022-11-03 02:02:30,215 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:02:30,233 INFO L390 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 21 treesize of output 7 [2022-11-03 02:02:30,243 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 119 [2022-11-03 02:02:30,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:30,258 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-11-03 02:02:30,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:30,273 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 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 74 treesize of output 58 [2022-11-03 02:02:30,291 INFO L390 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 58 [2022-11-03 02:02:30,332 INFO L390 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 21 treesize of output 7 [2022-11-03 02:02:30,348 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 62 treesize of output 19 [2022-11-03 02:02:30,534 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:02:31,593 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17559#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 02:02:31,593 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:02:31,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:02:31,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 31] total 91 [2022-11-03 02:02:31,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336066136] [2022-11-03 02:02:31,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:02:31,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-11-03 02:02:31,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:02:31,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-11-03 02:02:31,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1820, Invalid=7686, Unknown=0, NotChecked=0, Total=9506 [2022-11-03 02:02:31,595 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 91 states, 91 states have (on average 2.241758241758242) internal successors, (204), 91 states have internal predecessors, (204), 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) [2022-11-03 02:02:32,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:32,820 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2022-11-03 02:02:32,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-03 02:02:32,820 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.241758241758242) internal successors, (204), 91 states have internal predecessors, (204), 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 70 [2022-11-03 02:02:32,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:32,821 INFO L225 Difference]: With dead ends: 132 [2022-11-03 02:02:32,821 INFO L226 Difference]: Without dead ends: 72 [2022-11-03 02:02:32,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6000 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=2831, Invalid=11449, Unknown=0, NotChecked=0, Total=14280 [2022-11-03 02:02:32,823 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 149 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:32,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 233 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:02:32,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-03 02:02:32,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-11-03 02:02:32,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 states have internal predecessors, (73), 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) [2022-11-03 02:02:32,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2022-11-03 02:02:32,892 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 70 [2022-11-03 02:02:32,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:32,892 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2022-11-03 02:02:32,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.241758241758242) internal successors, (204), 91 states have internal predecessors, (204), 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) [2022-11-03 02:02:32,893 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2022-11-03 02:02:32,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 02:02:32,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:32,893 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 10, 1, 1, 1, 1, 1, 1] [2022-11-03 02:02:32,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:33,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:02:33,094 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:33,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:33,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1746679863, now seen corresponding path program 27 times [2022-11-03 02:02:33,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:02:33,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418895245] [2022-11-03 02:02:33,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:33,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:02:33,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:35,700 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 0 proven. 550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:35,700 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:02:35,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418895245] [2022-11-03 02:02:35,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418895245] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:02:35,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781674812] [2022-11-03 02:02:35,700 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:02:35,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:02:35,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:02:35,701 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:02:35,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-03 02:02:36,035 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:02:36,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:02:36,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-03 02:02:36,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:36,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:36,527 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 43 [2022-11-03 02:02:36,598 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 101 [2022-11-03 02:02:36,605 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 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 67 treesize of output 89 [2022-11-03 02:02:36,614 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 18 treesize of output 22 [2022-11-03 02:02:36,672 INFO L390 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 7 [2022-11-03 02:02:36,682 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2022-11-03 02:02:36,702 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2022-11-03 02:02:36,711 INFO L390 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 0 case distinctions, treesize of input 54 treesize of output 36 [2022-11-03 02:02:36,727 INFO L390 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 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-03 02:02:36,730 INFO L390 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 7 [2022-11-03 02:02:39,817 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:02:39,817 INFO L390 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 106 treesize of output 58 [2022-11-03 02:02:39,907 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 0 proven. 550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:39,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:41,555 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:02:41,555 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-11-03 02:02:41,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:02:41,648 INFO L356 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-03 02:02:41,649 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 112 [2022-11-03 02:02:41,671 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2022-11-03 02:02:42,271 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 0 proven. 550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:42,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781674812] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:42,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2053289508] [2022-11-03 02:02:42,273 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 02:02:42,273 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:02:42,273 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:02:42,273 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:02:42,273 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:02:42,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:42,313 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 02:02:42,313 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 02:02:42,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:42,323 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 24 treesize of output 32 [2022-11-03 02:02:42,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:42,358 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 175 [2022-11-03 02:02:42,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:42,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:42,388 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 199 treesize of output 221 [2022-11-03 02:02:42,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:42,409 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 02:02:42,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:42,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:42,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:42,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:42,435 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 184 treesize of output 138 [2022-11-03 02:02:42,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:42,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:42,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:42,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:42,480 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 184 treesize of output 138 [2022-11-03 02:02:42,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:42,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:42,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:42,547 INFO L390 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 39 treesize of output 23 [2022-11-03 02:02:42,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:42,560 INFO L390 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 [2022-11-03 02:02:42,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:42,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:42,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 196 [2022-11-03 02:02:42,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:42,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:42,733 INFO L390 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 0 case distinctions, treesize of input 123 treesize of output 101 [2022-11-03 02:02:42,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:42,744 INFO L390 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 22 treesize of output 14 [2022-11-03 02:02:42,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:42,792 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-03 02:02:42,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:42,813 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 136 [2022-11-03 02:02:42,826 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:02:42,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:42,841 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 14 [2022-11-03 02:02:42,854 INFO L390 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 21 treesize of output 7 [2022-11-03 02:02:42,870 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 119 [2022-11-03 02:02:42,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:42,886 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-11-03 02:02:42,925 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 175 treesize of output 195 [2022-11-03 02:02:42,976 INFO L390 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 52 [2022-11-03 02:02:42,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:42,984 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 16 [2022-11-03 02:02:43,006 INFO L390 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 21 treesize of output 7 [2022-11-03 02:02:43,193 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:02:44,653 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18410#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 02:02:44,653 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:02:44,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:02:44,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 33] total 96 [2022-11-03 02:02:44,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934871207] [2022-11-03 02:02:44,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:02:44,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-11-03 02:02:44,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:02:44,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-11-03 02:02:44,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=10130, Unknown=0, NotChecked=0, Total=10506 [2022-11-03 02:02:44,656 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 96 states, 96 states have (on average 2.1666666666666665) internal successors, (208), 96 states have internal predecessors, (208), 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) [2022-11-03 02:04:20,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:04:20,646 INFO L93 Difference]: Finished difference Result 426 states and 452 transitions. [2022-11-03 02:04:20,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 289 states. [2022-11-03 02:04:20,646 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.1666666666666665) internal successors, (208), 96 states have internal predecessors, (208), 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 71 [2022-11-03 02:04:20,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:04:20,649 INFO L225 Difference]: With dead ends: 426 [2022-11-03 02:04:20,649 INFO L226 Difference]: Without dead ends: 424 [2022-11-03 02:04:20,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 143 SyntacticMatches, 1 SemanticMatches, 385 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44865 ImplicationChecksByTransitivity, 92.2s TimeCoverageRelationStatistics Valid=7296, Invalid=142086, Unknown=0, NotChecked=0, Total=149382 [2022-11-03 02:04:20,657 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 543 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 4142 mSolverCounterSat, 1776 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 5918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1776 IncrementalHoareTripleChecker+Valid, 4142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:04:20,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [543 Valid, 741 Invalid, 5918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1776 Valid, 4142 Invalid, 0 Unknown, 0 Unchecked, 8.9s Time] [2022-11-03 02:04:20,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-11-03 02:04:20,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 75. [2022-11-03 02:04:20,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 states have internal predecessors, (76), 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) [2022-11-03 02:04:20,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2022-11-03 02:04:20,765 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 71 [2022-11-03 02:04:20,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:04:20,766 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2022-11-03 02:04:20,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.1666666666666665) internal successors, (208), 96 states have internal predecessors, (208), 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) [2022-11-03 02:04:20,799 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2022-11-03 02:04:20,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-03 02:04:20,800 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:04:20,800 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 10, 1, 1, 1, 1, 1, 1] [2022-11-03 02:04:20,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-03 02:04:21,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-03 02:04:21,001 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:04:21,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:04:21,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1805730742, now seen corresponding path program 28 times [2022-11-03 02:04:21,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:04:21,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728356640] [2022-11-03 02:04:21,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:21,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:04:21,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:23,554 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 0 proven. 606 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:04:23,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:04:23,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728356640] [2022-11-03 02:04:23,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728356640] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:04:23,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330660161] [2022-11-03 02:04:23,555 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:04:23,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:04:23,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:04:23,556 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:04:23,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d23bd8a-b42b-4ad2-82e5-4a5607a191a8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-03 02:04:23,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:23,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 74 conjunts are in the unsatisfiable core [2022-11-03 02:04:23,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:24,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:24,507 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 43 [2022-11-03 02:04:24,527 INFO L390 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 7 treesize of output 3 [2022-11-03 02:04:24,532 INFO L390 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 0 case distinctions, treesize of input 18 treesize of output 7 [2022-11-03 02:04:24,535 INFO L390 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 7 treesize of output 3 [2022-11-03 02:04:27,258 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 55 [2022-11-03 02:04:27,333 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 0 proven. 606 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:04:27,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:04:29,331 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:04:29,331 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-11-03 02:04:29,356 INFO L390 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 0 case distinctions, treesize of input 54 treesize of output 41 [2022-11-03 02:04:29,367 INFO L356 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-03 02:04:29,367 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 35 [2022-11-03 02:04:29,378 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2022-11-03 02:04:30,129 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 0 proven. 606 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:04:30,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330660161] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:04:30,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [92874449] [2022-11-03 02:04:30,130 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 02:04:30,131 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:04:30,131 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:04:30,131 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:04:30,131 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:04:30,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:30,189 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 02:04:30,189 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 02:04:30,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:30,204 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 24 treesize of output 32 [2022-11-03 02:04:30,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:30,243 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 175 [2022-11-03 02:04:30,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:30,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:30,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:30,325 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 262 treesize of output 306 [2022-11-03 02:04:30,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:30,352 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 194 treesize of output 198 [2022-11-03 02:04:30,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:30,375 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 196 treesize of output 200 [2022-11-03 02:04:30,396 INFO L390 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 187 treesize of output 185 [2022-11-03 02:04:30,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:30,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:30,424 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 02:04:30,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:30,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:30,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:30,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:30,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:30,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:30,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:30,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:30,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:30,806 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 80 [2022-11-03 02:04:30,817 INFO L390 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 7 treesize of output 3 [2022-11-03 02:04:30,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:30,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:30,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:30,871 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 285 treesize of output 282 [2022-11-03 02:04:30,888 INFO L390 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 270 treesize of output 266 [2022-11-03 02:04:30,901 INFO L390 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 266 treesize of output 262 [2022-11-03 02:04:30,993 INFO L390 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 7 treesize of output 3 [2022-11-03 02:04:31,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:31,051 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-03 02:04:31,069 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 129 [2022-11-03 02:04:31,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:31,093 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2022-11-03 02:04:31,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:31,144 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 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 69 treesize of output 46 [2022-11-03 02:04:31,161 INFO L390 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 21 treesize of output 7 [2022-11-03 02:04:31,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:31,183 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 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 74 treesize of output 60 [2022-11-03 02:04:31,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:31,195 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 16 [2022-11-03 02:04:31,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:31,209 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 76 [2022-11-03 02:04:31,228 INFO L390 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 40 treesize of output 19 [2022-11-03 02:04:31,242 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:04:31,261 INFO L390 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 10 treesize of output 3 [2022-11-03 02:04:31,278 INFO L390 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 10 treesize of output 3 [2022-11-03 02:04:31,500 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:04:33,443 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20223#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 02:04:33,443 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:04:33,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:04:33,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 34] total 99 [2022-11-03 02:04:33,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415823247] [2022-11-03 02:04:33,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:04:33,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-11-03 02:04:33,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:04:33,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-11-03 02:04:33,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=10744, Unknown=0, NotChecked=0, Total=11130 [2022-11-03 02:04:33,446 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 99 states, 99 states have (on average 2.191919191919192) internal successors, (217), 99 states have internal predecessors, (217), 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)