./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ss1.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_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/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_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/ss1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/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_17b317c3-3152-42c0-aeab-418d6aeca56b/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 26cc6c43657aae3d6045b0e296032a25844d2e64f01344915dc1323c4b8b39f3 --- 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 03:28:46,228 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:28:46,231 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:28:46,279 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:28:46,279 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:28:46,283 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:28:46,285 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:28:46,290 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:28:46,292 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:28:46,301 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:28:46,302 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:28:46,303 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:28:46,303 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:28:46,304 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:28:46,305 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:28:46,306 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:28:46,307 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:28:46,308 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:28:46,310 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:28:46,312 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:28:46,313 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:28:46,316 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:28:46,317 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:28:46,318 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:28:46,321 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:28:46,322 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:28:46,322 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:28:46,323 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:28:46,324 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:28:46,325 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:28:46,325 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:28:46,326 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:28:46,327 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:28:46,328 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:28:46,336 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:28:46,337 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:28:46,338 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:28:46,338 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:28:46,338 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:28:46,339 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:28:46,340 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:28:46,341 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 03:28:46,375 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:28:46,376 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:28:46,377 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:28:46,377 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:28:46,378 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:28:46,378 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:28:46,378 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:28:46,379 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:28:46,379 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:28:46,379 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:28:46,380 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:28:46,380 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:28:46,380 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:28:46,381 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:28:46,381 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:28:46,381 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:28:46,381 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:28:46,381 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:28:46,382 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:28:46,382 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:28:46,382 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:28:46,383 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:28:46,383 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:28:46,384 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:28:46,384 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:28:46,385 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:28:46,385 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:28:46,385 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:28:46,385 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:28:46,385 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:28:46,386 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:28:46,386 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:28:46,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:28:46,387 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:28:46,387 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:28:46,387 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:28:46,388 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:28:46,388 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:28:46,388 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:28:46,388 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:28:46,388 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:28:46,388 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_17b317c3-3152-42c0-aeab-418d6aeca56b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 26cc6c43657aae3d6045b0e296032a25844d2e64f01344915dc1323c4b8b39f3 [2022-11-03 03:28:46,675 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:28:46,715 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:28:46,718 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:28:46,719 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:28:46,720 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:28:46,721 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/array-fpi/ss1.c [2022-11-03 03:28:46,802 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/data/665feb01f/f6eaeeeb807146d4a199c8895296a27a/FLAG5b4470c10 [2022-11-03 03:28:47,285 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:28:47,285 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/sv-benchmarks/c/array-fpi/ss1.c [2022-11-03 03:28:47,292 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/data/665feb01f/f6eaeeeb807146d4a199c8895296a27a/FLAG5b4470c10 [2022-11-03 03:28:47,775 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/data/665feb01f/f6eaeeeb807146d4a199c8895296a27a [2022-11-03 03:28:47,778 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:28:47,779 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:28:47,787 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:28:47,787 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:28:47,790 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:28:47,791 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:28:47" (1/1) ... [2022-11-03 03:28:47,793 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55b20081 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:47, skipping insertion in model container [2022-11-03 03:28:47,793 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:28:47" (1/1) ... [2022-11-03 03:28:47,801 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:28:47,821 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:28:48,015 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_17b317c3-3152-42c0-aeab-418d6aeca56b/sv-benchmarks/c/array-fpi/ss1.c[586,599] [2022-11-03 03:28:48,035 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:28:48,043 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:28:48,062 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_17b317c3-3152-42c0-aeab-418d6aeca56b/sv-benchmarks/c/array-fpi/ss1.c[586,599] [2022-11-03 03:28:48,070 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:28:48,083 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:28:48,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:48 WrapperNode [2022-11-03 03:28:48,084 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:28:48,085 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:28:48,085 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:28:48,085 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:28:48,093 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:48" (1/1) ... [2022-11-03 03:28:48,100 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:48" (1/1) ... [2022-11-03 03:28:48,120 INFO L138 Inliner]: procedures = 17, calls = 31, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 95 [2022-11-03 03:28:48,121 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:28:48,122 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:28:48,122 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:28:48,122 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:28:48,131 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:48" (1/1) ... [2022-11-03 03:28:48,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:48" (1/1) ... [2022-11-03 03:28:48,134 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:48" (1/1) ... [2022-11-03 03:28:48,134 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:48" (1/1) ... [2022-11-03 03:28:48,139 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:48" (1/1) ... [2022-11-03 03:28:48,144 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:48" (1/1) ... [2022-11-03 03:28:48,145 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:48" (1/1) ... [2022-11-03 03:28:48,146 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:48" (1/1) ... [2022-11-03 03:28:48,148 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:28:48,149 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:28:48,149 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:28:48,149 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:28:48,150 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:48" (1/1) ... [2022-11-03 03:28:48,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:28:48,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:28:48,186 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:28:48,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:28:48,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:28:48,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:28:48,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 03:28:48,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 03:28:48,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 03:28:48,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:28:48,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:28:48,229 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 03:28:48,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 03:28:48,303 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:28:48,305 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:28:48,482 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:28:48,544 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:28:48,544 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-03 03:28:48,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:28:48 BoogieIcfgContainer [2022-11-03 03:28:48,557 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:28:48,560 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:28:48,560 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:28:48,564 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:28:48,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:28:47" (1/3) ... [2022-11-03 03:28:48,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cfb6d6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:28:48, skipping insertion in model container [2022-11-03 03:28:48,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:48" (2/3) ... [2022-11-03 03:28:48,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cfb6d6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:28:48, skipping insertion in model container [2022-11-03 03:28:48,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:28:48" (3/3) ... [2022-11-03 03:28:48,568 INFO L112 eAbstractionObserver]: Analyzing ICFG ss1.c [2022-11-03 03:28:48,588 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:28:48,588 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:28:48,650 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:28:48,658 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;@3e8eacb1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:28:48,658 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:28:48,663 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 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 03:28:48,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-03 03:28:48,669 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:48,670 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:48,671 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:48,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:48,677 INFO L85 PathProgramCache]: Analyzing trace with hash 581057961, now seen corresponding path program 1 times [2022-11-03 03:28:48,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:28:48,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10723160] [2022-11-03 03:28:48,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:48,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:28:48,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:48,840 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:28:48,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10723160] [2022-11-03 03:28:48,841 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-03 03:28:48,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904871982] [2022-11-03 03:28:48,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:48,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:28:48,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:28:48,844 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:28:48,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 03:28:48,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:48,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:28:49,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:49,106 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 03:28:49,106 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:28:49,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904871982] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:49,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:49,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:28:49,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755204376] [2022-11-03 03:28:49,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:49,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:28:49,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:28:49,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:28:49,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:28:49,160 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 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) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 03:28:49,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:49,211 INFO L93 Difference]: Finished difference Result 22 states and 31 transitions. [2022-11-03 03:28:49,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:28:49,214 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 03:28:49,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:49,222 INFO L225 Difference]: With dead ends: 22 [2022-11-03 03:28:49,223 INFO L226 Difference]: Without dead ends: 10 [2022-11-03 03:28:49,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:28:49,229 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:49,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:28:49,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-11-03 03:28:49,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-11-03 03:28:49,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 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 03:28:49,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2022-11-03 03:28:49,270 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 8 [2022-11-03 03:28:49,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:49,270 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2022-11-03 03:28:49,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 03:28:49,272 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2022-11-03 03:28:49,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 03:28:49,273 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:49,273 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:49,294 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-03 03:28:49,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:28:49,474 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:49,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:49,476 INFO L85 PathProgramCache]: Analyzing trace with hash 431603023, now seen corresponding path program 1 times [2022-11-03 03:28:49,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:28:49,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308865537] [2022-11-03 03:28:49,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:49,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:28:49,529 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:28:49,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1253869189] [2022-11-03 03:28:49,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:49,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:28:49,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:28:49,531 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:28:49,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 03:28:49,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:49,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:28:49,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:49,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:28:49,679 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:28:49,679 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:28:49,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308865537] [2022-11-03 03:28:49,682 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:28:49,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253869189] [2022-11-03 03:28:49,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253869189] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:49,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:49,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:28:49,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935372630] [2022-11-03 03:28:49,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:49,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:28:49,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:28:49,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:28:49,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:28:49,694 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 03:28:49,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:49,745 INFO L93 Difference]: Finished difference Result 18 states and 25 transitions. [2022-11-03 03:28:49,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:28:49,746 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 9 [2022-11-03 03:28:49,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:49,747 INFO L225 Difference]: With dead ends: 18 [2022-11-03 03:28:49,747 INFO L226 Difference]: Without dead ends: 13 [2022-11-03 03:28:49,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:28:49,749 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 7 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:49,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 4 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:28:49,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-03 03:28:49,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-03 03:28:49,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:49,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2022-11-03 03:28:49,757 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 9 [2022-11-03 03:28:49,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:49,758 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2022-11-03 03:28:49,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 03:28:49,759 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2022-11-03 03:28:49,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-03 03:28:49,760 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:49,760 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:49,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:28:49,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:28:49,965 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:49,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:49,966 INFO L85 PathProgramCache]: Analyzing trace with hash 792964949, now seen corresponding path program 1 times [2022-11-03 03:28:49,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:28:49,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120928468] [2022-11-03 03:28:49,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:49,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:28:50,002 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:28:50,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [309082494] [2022-11-03 03:28:50,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:50,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:28:50,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:28:50,004 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:28:50,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 03:28:50,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:50,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-03 03:28:50,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:50,179 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 8 [2022-11-03 03:28:50,196 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:28:50,236 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-03 03:28:50,348 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-03 03:28:50,480 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-03 03:28:50,578 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 25 [2022-11-03 03:28:50,675 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 35 [2022-11-03 03:28:50,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:50,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:28:51,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:51,296 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:28:51,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120928468] [2022-11-03 03:28:51,297 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:28:51,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309082494] [2022-11-03 03:28:51,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309082494] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:28:51,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1347778249] [2022-11-03 03:28:51,326 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 03:28:51,326 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:28:51,330 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:28:51,336 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:28:51,338 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:28:51,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:51,434 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 03:28:51,435 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 92 [2022-11-03 03:28:51,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:51,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:51,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:51,553 INFO L356 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-03 03:28:51,554 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-03 03:28:51,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:51,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:51,621 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 29 treesize of output 39 [2022-11-03 03:28:51,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:51,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:51,688 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-11-03 03:28:51,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:51,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:51,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:51,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:51,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:51,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:28:51,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:51,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:51,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:51,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:51,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:51,984 INFO L356 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-11-03 03:28:51,987 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 20 case distinctions, treesize of input 420 treesize of output 410 [2022-11-03 03:28:52,144 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 16 treesize of output 12 [2022-11-03 03:28:52,205 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:28:52,235 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 03:28:52,236 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 03:28:52,352 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 03:28:52,352 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 03:28:52,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:28:52,448 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 03:28:52,449 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-11-03 03:28:52,559 INFO L356 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-03 03:28:52,559 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-03 03:28:52,629 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:28:52,655 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 03:28:52,656 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 03:28:52,747 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 03:28:52,748 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 03:28:52,786 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:28:53,318 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '248#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-03 03:28:53,318 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:28:53,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:28:53,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2022-11-03 03:28:53,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750088373] [2022-11-03 03:28:53,319 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 03:28:53,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-03 03:28:53,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:28:53,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-03 03:28:53,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2022-11-03 03:28:53,322 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 19 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:53,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:53,812 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2022-11-03 03:28:53,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 03:28:53,812 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-03 03:28:53,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:53,813 INFO L225 Difference]: With dead ends: 27 [2022-11-03 03:28:53,813 INFO L226 Difference]: Without dead ends: 21 [2022-11-03 03:28:53,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-11-03 03:28:53,815 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:53,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 23 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 140 Invalid, 0 Unknown, 27 Unchecked, 0.3s Time] [2022-11-03 03:28:53,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-03 03:28:53,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2022-11-03 03:28:53,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 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 03:28:53,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2022-11-03 03:28:53,823 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 12 [2022-11-03 03:28:53,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:53,824 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2022-11-03 03:28:53,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:53,824 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2022-11-03 03:28:53,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 03:28:53,825 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:53,825 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:53,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:28:54,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:28:54,043 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:54,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:54,044 INFO L85 PathProgramCache]: Analyzing trace with hash -911807493, now seen corresponding path program 2 times [2022-11-03 03:28:54,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:28:54,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105789444] [2022-11-03 03:28:54,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:54,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:28:54,098 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:28:54,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [564893151] [2022-11-03 03:28:54,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:28:54,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:28:54,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:28:54,100 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:28:54,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 03:28:54,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 03:28:54,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:28:54,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:28:54,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:54,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:28:54,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:28:54,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:28:54,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:28:54,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105789444] [2022-11-03 03:28:54,262 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:28:54,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564893151] [2022-11-03 03:28:54,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564893151] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:28:54,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [391903003] [2022-11-03 03:28:54,265 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 03:28:54,265 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:28:54,265 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:28:54,266 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:28:54,266 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:28:54,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:54,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:54,363 INFO L356 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-03 03:28:54,364 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 3 case distinctions, treesize of input 29 treesize of output 57 [2022-11-03 03:28:54,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:54,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:54,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:54,468 INFO L356 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-03 03:28:54,468 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-03 03:28:54,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:54,490 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 88 [2022-11-03 03:28:54,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:54,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:54,532 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-03 03:28:54,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:54,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:54,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:54,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:54,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:54,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:28:54,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:28:54,756 INFO L356 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-03 03:28:54,756 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 20 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 415 treesize of output 411 [2022-11-03 03:28:54,862 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 16 treesize of output 12 [2022-11-03 03:28:54,901 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 03:28:54,901 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 03:28:54,979 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 03:28:54,979 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 03:28:55,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:28:55,057 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 03:28:55,057 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 03:28:55,127 INFO L356 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-03 03:28:55,128 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-03 03:28:55,194 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 03:28:55,195 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 03:28:55,265 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 03:28:55,266 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 03:28:55,298 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:28:55,723 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '415#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-03 03:28:55,724 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:28:55,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:28:55,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-03 03:28:55,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017870162] [2022-11-03 03:28:55,724 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 03:28:55,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 03:28:55,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:28:55,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 03:28:55,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:28:55,726 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 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 03:28:55,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:55,875 INFO L93 Difference]: Finished difference Result 31 states and 41 transitions. [2022-11-03 03:28:55,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:28:55,875 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 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) Word has length 13 [2022-11-03 03:28:55,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:55,876 INFO L225 Difference]: With dead ends: 31 [2022-11-03 03:28:55,876 INFO L226 Difference]: Without dead ends: 24 [2022-11-03 03:28:55,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-03 03:28:55,877 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 6 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:55,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 4 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:28:55,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-03 03:28:55,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2022-11-03 03:28:55,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.35) internal successors, (27), 20 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 03:28:55,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2022-11-03 03:28:55,889 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 13 [2022-11-03 03:28:55,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:55,889 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2022-11-03 03:28:55,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 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 03:28:55,890 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2022-11-03 03:28:55,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 03:28:55,892 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:55,893 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:55,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 03:28:56,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:28:56,093 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:56,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:56,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1188195942, now seen corresponding path program 3 times [2022-11-03 03:28:56,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:28:56,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809928751] [2022-11-03 03:28:56,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:56,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:28:56,118 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:28:56,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1190944567] [2022-11-03 03:28:56,118 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 03:28:56,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:28:56,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:28:56,122 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:28:56,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 03:28:56,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 03:28:56,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:28:56,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:28:56,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:56,225 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:28:56,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:28:56,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:28:56,263 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:28:56,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809928751] [2022-11-03 03:28:56,264 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:28:56,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190944567] [2022-11-03 03:28:56,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190944567] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:28:56,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1821902748] [2022-11-03 03:28:56,266 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 03:28:56,266 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:28:56,267 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:28:56,267 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:28:56,267 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:28:56,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:56,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:56,375 INFO L356 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-03 03:28:56,375 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 3 case distinctions, treesize of input 29 treesize of output 57 [2022-11-03 03:28:56,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:56,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:56,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:56,488 INFO L356 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-03 03:28:56,488 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-03 03:28:56,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:56,509 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 88 [2022-11-03 03:28:56,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:56,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:56,609 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-11-03 03:28:56,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:56,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:56,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:56,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:56,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:56,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:28:56,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:56,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:56,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:56,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:56,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:56,869 INFO L356 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-11-03 03:28:56,870 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 20 case distinctions, treesize of input 420 treesize of output 410 [2022-11-03 03:28:56,971 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 16 treesize of output 12 [2022-11-03 03:28:57,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:28:57,029 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 03:28:57,032 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 03:28:57,134 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 03:28:57,134 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 03:28:57,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:28:57,218 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 03:28:57,219 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-11-03 03:28:57,303 INFO L356 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-03 03:28:57,304 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-03 03:28:57,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:28:57,395 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 03:28:57,395 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 03:28:57,478 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 03:28:57,478 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 03:28:57,507 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:28:57,906 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '599#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-03 03:28:57,906 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:28:57,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:28:57,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-03 03:28:57,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602113946] [2022-11-03 03:28:57,906 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 03:28:57,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 03:28:57,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:28:57,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 03:28:57,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:28:57,908 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 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 03:28:58,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:58,001 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2022-11-03 03:28:58,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:28:58,001 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 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) Word has length 13 [2022-11-03 03:28:58,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:58,002 INFO L225 Difference]: With dead ends: 33 [2022-11-03 03:28:58,002 INFO L226 Difference]: Without dead ends: 17 [2022-11-03 03:28:58,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-11-03 03:28:58,003 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:58,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 8 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:28:58,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-03 03:28:58,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-03 03:28:58,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 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 03:28:58,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-11-03 03:28:58,009 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 13 [2022-11-03 03:28:58,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:58,009 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-11-03 03:28:58,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 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 03:28:58,009 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-11-03 03:28:58,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-03 03:28:58,010 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:58,010 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:58,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 03:28:58,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:28:58,229 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:58,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:58,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1993429225, now seen corresponding path program 4 times [2022-11-03 03:28:58,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:28:58,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031065357] [2022-11-03 03:28:58,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:58,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:28:58,254 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:28:58,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1562753769] [2022-11-03 03:28:58,254 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 03:28:58,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:28:58,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:28:58,256 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:28:58,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 03:28:58,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:58,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-03 03:28:58,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:58,395 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 11 treesize of output 7 [2022-11-03 03:28:58,400 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 8 [2022-11-03 03:28:58,421 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-03 03:28:58,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:58,459 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-03 03:28:58,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:58,542 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-11-03 03:28:58,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:58,592 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2022-11-03 03:28:58,690 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:28:58,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:58,697 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 40 [2022-11-03 03:28:58,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:58,750 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 37 [2022-11-03 03:28:58,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:28:58,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:58,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2022-11-03 03:28:58,923 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2022-11-03 03:28:59,001 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 40 [2022-11-03 03:28:59,035 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:59,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:18,234 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:18,234 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:18,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031065357] [2022-11-03 03:29:18,234 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:29:18,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562753769] [2022-11-03 03:29:18,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562753769] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:29:18,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1233000390] [2022-11-03 03:29:18,237 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 03:29:18,237 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:29:18,237 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:29:18,237 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:29:18,238 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:29:18,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:18,276 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 03:29:18,277 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 92 [2022-11-03 03:29:18,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:18,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:18,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:18,378 INFO L356 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-03 03:29:18,379 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-03 03:29:18,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:18,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:18,402 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 29 treesize of output 39 [2022-11-03 03:29:18,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:18,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:18,441 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-03 03:29:18,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:18,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:18,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:18,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:18,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:18,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:18,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:18,630 INFO L356 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-03 03:29:18,631 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 20 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 415 treesize of output 411 [2022-11-03 03:29:18,807 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 16 treesize of output 12 [2022-11-03 03:29:18,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:18,848 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 03:29:18,848 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 03:29:18,927 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 03:29:18,927 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 03:29:18,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:19,000 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 03:29:19,001 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 03:29:19,073 INFO L356 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-03 03:29:19,074 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-03 03:29:19,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:19,125 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 03:29:19,126 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 03:29:19,205 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 03:29:19,205 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 03:29:19,234 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:29:20,930 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '811#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-03 03:29:20,931 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:29:20,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:29:20,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2022-11-03 03:29:20,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116598143] [2022-11-03 03:29:20,931 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 03:29:20,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-03 03:29:20,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:20,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-03 03:29:20,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=839, Unknown=3, NotChecked=0, Total=930 [2022-11-03 03:29:20,933 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 27 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:26,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:26,981 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2022-11-03 03:29:26,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-03 03:29:26,981 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-03 03:29:26,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:26,982 INFO L225 Difference]: With dead ends: 36 [2022-11-03 03:29:26,982 INFO L226 Difference]: Without dead ends: 29 [2022-11-03 03:29:26,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 24.8s TimeCoverageRelationStatistics Valid=113, Invalid=1074, Unknown=3, NotChecked=0, Total=1190 [2022-11-03 03:29:26,985 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:26,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 37 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 288 Invalid, 0 Unknown, 38 Unchecked, 1.9s Time] [2022-11-03 03:29:26,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-03 03:29:26,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2022-11-03 03:29:26,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 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 03:29:26,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2022-11-03 03:29:26,994 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 16 [2022-11-03 03:29:26,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:26,995 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2022-11-03 03:29:26,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:26,995 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2022-11-03 03:29:26,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 03:29:26,996 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:26,996 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:27,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:27,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-03 03:29:27,201 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:27,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:27,201 INFO L85 PathProgramCache]: Analyzing trace with hash 2119813775, now seen corresponding path program 5 times [2022-11-03 03:29:27,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:27,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820008920] [2022-11-03 03:29:27,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:27,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:27,253 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:29:27,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1215180036] [2022-11-03 03:29:27,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:29:27,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:27,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:27,265 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:27,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 03:29:27,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 03:29:27,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:29:27,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:29:27,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:27,471 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:29:27,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:27,520 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:29:27,521 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:27,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820008920] [2022-11-03 03:29:27,521 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:29:27,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215180036] [2022-11-03 03:29:27,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215180036] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:29:27,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [112815572] [2022-11-03 03:29:27,523 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 03:29:27,524 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:29:27,524 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:29:27,524 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:29:27,525 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:29:27,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:27,564 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 03:29:27,565 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 92 [2022-11-03 03:29:27,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:27,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:27,672 INFO L356 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-03 03:29:27,673 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 3 case distinctions, treesize of input 29 treesize of output 57 [2022-11-03 03:29:27,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:27,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:27,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:27,774 INFO L356 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-03 03:29:27,774 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-03 03:29:27,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:27,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:27,814 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-03 03:29:27,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:27,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:27,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:27,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:27,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:27,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:27,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:27,994 INFO L356 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-03 03:29:27,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 20 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 415 treesize of output 411 [2022-11-03 03:29:28,088 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 16 treesize of output 12 [2022-11-03 03:29:28,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:28,137 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 03:29:28,137 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 03:29:28,225 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 03:29:28,226 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 03:29:28,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:28,293 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 03:29:28,294 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-11-03 03:29:28,376 INFO L356 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-03 03:29:28,377 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-03 03:29:28,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:28,447 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 03:29:28,447 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 03:29:28,526 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 03:29:28,526 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 03:29:28,554 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:29:29,040 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1039#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-03 03:29:29,040 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:29:29,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:29:29,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-03 03:29:29,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354932135] [2022-11-03 03:29:29,041 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 03:29:29,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 03:29:29,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:29,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 03:29:29,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:29:29,042 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 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 03:29:29,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:29,240 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2022-11-03 03:29:29,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 03:29:29,241 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 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 17 [2022-11-03 03:29:29,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:29,242 INFO L225 Difference]: With dead ends: 41 [2022-11-03 03:29:29,242 INFO L226 Difference]: Without dead ends: 32 [2022-11-03 03:29:29,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 13 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2022-11-03 03:29:29,243 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 9 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:29,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 4 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:29:29,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-03 03:29:29,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2022-11-03 03:29:29,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:29,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-11-03 03:29:29,254 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 17 [2022-11-03 03:29:29,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:29,255 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-11-03 03:29:29,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 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 03:29:29,255 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-11-03 03:29:29,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 03:29:29,256 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:29,256 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:29,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:29,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:29,462 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:29,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:29,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1666458246, now seen corresponding path program 6 times [2022-11-03 03:29:29,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:29,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457912240] [2022-11-03 03:29:29,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:29,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:29,489 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:29:29,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1981917884] [2022-11-03 03:29:29,493 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 03:29:29,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:29,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:29,494 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:29,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 03:29:29,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 03:29:29,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:29:29,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:29:29,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:29,649 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:29:29,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:29,710 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:29:29,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:29,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457912240] [2022-11-03 03:29:29,710 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:29:29,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981917884] [2022-11-03 03:29:29,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981917884] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:29:29,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [686712877] [2022-11-03 03:29:29,713 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 03:29:29,713 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:29:29,713 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:29:29,714 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:29:29,714 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:29:29,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:29,751 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 03:29:29,752 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 92 [2022-11-03 03:29:29,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:29,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:29,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:29,849 INFO L356 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-03 03:29:29,850 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-03 03:29:29,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:29,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:29,897 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 29 treesize of output 39 [2022-11-03 03:29:29,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:29,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:29,940 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-11-03 03:29:30,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:30,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:30,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:30,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:30,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:30,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:30,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:30,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:30,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:30,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:30,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:30,122 INFO L356 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-11-03 03:29:30,122 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 20 case distinctions, treesize of input 420 treesize of output 410 [2022-11-03 03:29:30,229 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 16 treesize of output 12 [2022-11-03 03:29:30,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:30,281 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 03:29:30,281 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 03:29:30,355 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 03:29:30,355 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 03:29:30,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:30,423 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 03:29:30,423 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 03:29:30,493 INFO L356 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-03 03:29:30,493 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-03 03:29:30,534 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 03:29:30,534 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 03:29:30,607 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 03:29:30,608 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 03:29:30,635 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:29:31,022 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1284#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-03 03:29:31,022 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:29:31,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:29:31,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-03 03:29:31,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329666581] [2022-11-03 03:29:31,023 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 03:29:31,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 03:29:31,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:31,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 03:29:31,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:29:31,024 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 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 03:29:31,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:31,152 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2022-11-03 03:29:31,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:29:31,152 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 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 17 [2022-11-03 03:29:31,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:31,153 INFO L225 Difference]: With dead ends: 42 [2022-11-03 03:29:31,153 INFO L226 Difference]: Without dead ends: 21 [2022-11-03 03:29:31,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2022-11-03 03:29:31,155 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:31,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 8 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:29:31,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-03 03:29:31,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-03 03:29:31,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 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 03:29:31,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-11-03 03:29:31,164 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 17 [2022-11-03 03:29:31,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:31,164 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-11-03 03:29:31,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 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 03:29:31,165 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-11-03 03:29:31,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-03 03:29:31,165 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:31,165 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:31,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:31,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:31,369 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:31,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:31,369 INFO L85 PathProgramCache]: Analyzing trace with hash -72472683, now seen corresponding path program 7 times [2022-11-03 03:29:31,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:31,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122011934] [2022-11-03 03:29:31,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:31,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:31,426 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:29:31,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1480427663] [2022-11-03 03:29:31,427 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 03:29:31,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:31,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:31,428 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:31,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 03:29:31,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:31,563 WARN L261 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 90 conjunts are in the unsatisfiable core [2022-11-03 03:29:31,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:31,579 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 11 treesize of output 7 [2022-11-03 03:29:31,585 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 8 [2022-11-03 03:29:31,606 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 23 [2022-11-03 03:29:31,639 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2022-11-03 03:29:31,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:31,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:31,689 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-03 03:29:31,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:31,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:31,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:31,791 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 52 [2022-11-03 03:29:31,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:31,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:31,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:31,858 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 55 [2022-11-03 03:29:31,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:31,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:31,930 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 51 [2022-11-03 03:29:32,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:32,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:32,066 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 49 [2022-11-03 03:29:32,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:32,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:32,136 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 51 [2022-11-03 03:29:32,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:32,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:32,221 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 47 [2022-11-03 03:29:32,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:32,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:32,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:32,354 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 54 [2022-11-03 03:29:32,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:32,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:32,433 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 47 [2022-11-03 03:29:32,512 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 43 [2022-11-03 03:29:32,605 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 43 [2022-11-03 03:29:32,662 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:32,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:13,066 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:31:13,066 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:31:13,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122011934] [2022-11-03 03:31:13,066 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:31:13,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480427663] [2022-11-03 03:31:13,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480427663] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:31:13,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1328451129] [2022-11-03 03:31:13,069 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 03:31:13,069 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:31:13,069 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:31:13,070 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:31:13,070 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:31:13,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:13,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:13,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:13,176 INFO L356 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-03 03:31:13,177 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-03 03:31:13,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:13,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:13,196 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 29 treesize of output 39 [2022-11-03 03:31:13,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:13,215 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 88 [2022-11-03 03:31:13,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:13,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:13,252 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-03 03:31:13,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:13,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:13,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:13,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:13,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:13,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:13,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:13,415 INFO L356 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-03 03:31:13,416 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 20 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 415 treesize of output 411 [2022-11-03 03:31:13,516 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 16 treesize of output 12 [2022-11-03 03:31:13,554 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 03:31:13,555 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 03:31:13,624 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 03:31:13,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 03:31:13,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:13,687 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 03:31:13,687 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 03:31:13,764 INFO L356 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-03 03:31:13,764 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-03 03:31:13,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:13,807 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 03:31:13,807 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 03:31:13,885 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 03:31:13,885 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 03:31:13,910 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:31:18,585 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1556#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-03 03:31:18,585 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:31:18,585 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:31:18,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 35 [2022-11-03 03:31:18,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988270264] [2022-11-03 03:31:18,586 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 03:31:18,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-03 03:31:18,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:31:18,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-03 03:31:18,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1354, Unknown=15, NotChecked=0, Total=1482 [2022-11-03 03:31:18,588 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 35 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 03:31:58,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:58,475 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2022-11-03 03:31:58,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 03:31:58,475 INFO L78 Accepts]: Start accepts. Automaton has has 35 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) Word has length 20 [2022-11-03 03:31:58,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:58,476 INFO L225 Difference]: With dead ends: 45 [2022-11-03 03:31:58,476 INFO L226 Difference]: Without dead ends: 37 [2022-11-03 03:31:58,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 12 SyntacticMatches, 9 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 136.0s TimeCoverageRelationStatistics Valid=148, Invalid=1726, Unknown=18, NotChecked=0, Total=1892 [2022-11-03 03:31:58,479 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:58,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 49 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 414 Invalid, 0 Unknown, 86 Unchecked, 7.6s Time] [2022-11-03 03:31:58,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-03 03:31:58,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2022-11-03 03:31:58,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 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 03:31:58,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2022-11-03 03:31:58,504 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 20 [2022-11-03 03:31:58,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:58,505 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2022-11-03 03:31:58,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 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 03:31:58,505 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2022-11-03 03:31:58,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-03 03:31:58,510 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:58,510 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:31:58,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:58,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-03 03:31:58,736 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:31:58,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:58,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1317708229, now seen corresponding path program 8 times [2022-11-03 03:31:58,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:31:58,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342699364] [2022-11-03 03:31:58,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:58,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:31:58,760 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:31:58,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1014061714] [2022-11-03 03:31:58,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:31:58,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:31:58,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:31:58,762 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:31:58,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 03:31:58,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 03:31:58,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:31:58,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:31:58,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:59,059 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 03:31:59,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:59,154 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 03:31:59,154 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:31:59,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342699364] [2022-11-03 03:31:59,154 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:31:59,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014061714] [2022-11-03 03:31:59,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014061714] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:31:59,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [297169623] [2022-11-03 03:31:59,157 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 03:31:59,157 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:31:59,157 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:31:59,157 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:31:59,158 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:31:59,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:59,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:59,278 INFO L356 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-03 03:31:59,278 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 3 case distinctions, treesize of input 29 treesize of output 57 [2022-11-03 03:31:59,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:59,322 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 03:31:59,322 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 92 [2022-11-03 03:31:59,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:59,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:59,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:59,458 INFO L356 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-03 03:31:59,459 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-03 03:31:59,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:59,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:59,511 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-11-03 03:31:59,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:59,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:59,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:59,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:59,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:59,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:59,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:59,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:59,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:59,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:59,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:59,671 INFO L356 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-11-03 03:31:59,671 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 20 case distinctions, treesize of input 420 treesize of output 410 [2022-11-03 03:31:59,758 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 16 treesize of output 12 [2022-11-03 03:31:59,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:59,824 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 03:31:59,824 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 03:31:59,912 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 03:31:59,912 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 03:31:59,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:59,986 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 03:31:59,986 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-11-03 03:32:00,081 INFO L356 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-03 03:32:00,081 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-03 03:32:00,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:00,162 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 03:32:00,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 03:32:00,253 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 03:32:00,253 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 03:32:00,283 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:32:00,681 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1843#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-03 03:32:00,681 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:32:00,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:32:00,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-11-03 03:32:00,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142258818] [2022-11-03 03:32:00,682 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 03:32:00,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-03 03:32:00,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:32:00,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-03 03:32:00,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-11-03 03:32:00,683 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 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 03:32:01,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:01,094 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2022-11-03 03:32:01,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 03:32:01,096 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 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 03:32:01,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:01,096 INFO L225 Difference]: With dead ends: 51 [2022-11-03 03:32:01,097 INFO L226 Difference]: Without dead ends: 40 [2022-11-03 03:32:01,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2022-11-03 03:32:01,098 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 12 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:01,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 10 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:32:01,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-03 03:32:01,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2022-11-03 03:32:01,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 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 03:32:01,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2022-11-03 03:32:01,116 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 21 [2022-11-03 03:32:01,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:01,117 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2022-11-03 03:32:01,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 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 03:32:01,117 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2022-11-03 03:32:01,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-03 03:32:01,118 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:01,118 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:01,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:01,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 03:32:01,323 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:32:01,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:01,323 INFO L85 PathProgramCache]: Analyzing trace with hash 2048008538, now seen corresponding path program 9 times [2022-11-03 03:32:01,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:32:01,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656473057] [2022-11-03 03:32:01,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:01,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:32:01,346 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:32:01,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2034337950] [2022-11-03 03:32:01,346 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 03:32:01,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:32:01,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:32:01,348 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:32:01,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 03:32:01,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 03:32:01,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:32:01,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:32:01,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:01,528 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 03:32:01,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:32:01,632 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 03:32:01,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:32:01,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656473057] [2022-11-03 03:32:01,633 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:32:01,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034337950] [2022-11-03 03:32:01,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034337950] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:32:01,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1126918171] [2022-11-03 03:32:01,637 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 03:32:01,637 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:32:01,638 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:32:01,638 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:32:01,638 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:32:01,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:01,702 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 03:32:01,702 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 92 [2022-11-03 03:32:01,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:01,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:01,818 INFO L356 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-03 03:32:01,818 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 3 case distinctions, treesize of input 29 treesize of output 57 [2022-11-03 03:32:01,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:01,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:01,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:01,936 INFO L356 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-03 03:32:01,936 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-03 03:32:01,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:01,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:01,981 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-11-03 03:32:02,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:02,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:02,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:02,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:02,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:02,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:02,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:02,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:02,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:02,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:02,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:02,135 INFO L356 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-11-03 03:32:02,135 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 20 case distinctions, treesize of input 420 treesize of output 410 [2022-11-03 03:32:02,217 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 16 treesize of output 12 [2022-11-03 03:32:02,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:02,274 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 03:32:02,275 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 03:32:02,381 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 03:32:02,382 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 03:32:02,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:02,441 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 03:32:02,441 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-11-03 03:32:02,525 INFO L356 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-03 03:32:02,526 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-03 03:32:02,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:02,589 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 03:32:02,589 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 03:32:02,682 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 03:32:02,683 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 03:32:02,712 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:32:03,129 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2149#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-03 03:32:03,129 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:32:03,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:32:03,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-11-03 03:32:03,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687328812] [2022-11-03 03:32:03,130 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 03:32:03,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-03 03:32:03,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:32:03,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-03 03:32:03,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-11-03 03:32:03,131 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 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 03:32:03,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:03,371 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2022-11-03 03:32:03,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 03:32:03,371 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 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 03:32:03,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:03,372 INFO L225 Difference]: With dead ends: 51 [2022-11-03 03:32:03,372 INFO L226 Difference]: Without dead ends: 25 [2022-11-03 03:32:03,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2022-11-03 03:32:03,373 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 6 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:03,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 12 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:32:03,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-03 03:32:03,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-03 03:32:03,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 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 03:32:03,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-11-03 03:32:03,385 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 21 [2022-11-03 03:32:03,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:03,385 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-11-03 03:32:03,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 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 03:32:03,386 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-11-03 03:32:03,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-03 03:32:03,387 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:03,387 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:03,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:03,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:32:03,589 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:32:03,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:03,589 INFO L85 PathProgramCache]: Analyzing trace with hash 992060457, now seen corresponding path program 10 times [2022-11-03 03:32:03,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:32:03,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299556940] [2022-11-03 03:32:03,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:03,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:32:03,625 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:32:03,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1362961962] [2022-11-03 03:32:03,625 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 03:32:03,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:32:03,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:32:03,627 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:32:03,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 03:32:03,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:03,786 WARN L261 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 114 conjunts are in the unsatisfiable core [2022-11-03 03:32:03,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:03,801 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 8 [2022-11-03 03:32:03,806 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:32:03,836 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-03 03:32:03,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:03,865 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-03 03:32:03,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:03,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:03,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:03,916 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 45 [2022-11-03 03:32:03,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:03,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:03,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:03,971 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 54 [2022-11-03 03:32:04,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:04,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:04,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:04,107 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 59 [2022-11-03 03:32:04,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:04,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:04,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:04,179 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 59 [2022-11-03 03:32:04,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:04,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:04,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:04,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:04,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:04,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:04,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:04,269 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 64 [2022-11-03 03:32:04,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:04,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:04,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:04,360 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 64 [2022-11-03 03:32:04,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:04,541 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:04,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:04,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:04,544 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 69 [2022-11-03 03:32:04,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:04,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:04,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:04,649 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 63 [2022-11-03 03:32:04,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:04,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:04,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:04,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:04,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:04,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:04,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:04,743 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 66 [2022-11-03 03:32:04,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:04,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:04,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:04,851 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 63 [2022-11-03 03:32:05,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:05,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:05,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:05,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:05,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 70 [2022-11-03 03:32:05,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:05,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:05,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:05,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:05,189 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 75 [2022-11-03 03:32:05,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:05,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:05,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:05,307 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 74 [2022-11-03 03:32:05,416 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 64 [2022-11-03 03:32:05,542 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 51 [2022-11-03 03:32:05,600 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:05,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:34:05,153 WARN L833 $PredicateComparison]: unable to prove that (forall ((~N~0 Int)) (or (< (+ 2 |c_ULTIMATE.start_main_~i~0#1|) ~N~0) (not (< (+ |c_ULTIMATE.start_main_~i~0#1| 1) ~N~0)) (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) (let ((.cse21 (let ((.cse22 (* 8 |c_ULTIMATE.start_main_~i~0#1|))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse22 |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (+ .cse22 8 |c_ULTIMATE.start_main_~a~0#1.offset|) 1)))) (let ((.cse19 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse21))) (let ((.cse20 (select .cse19 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse1 (select .cse20 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse2 (select .cse21 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse13 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse9 (select (select (store .cse19 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse20 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 .cse2))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse13)) (.cse12 (+ 16 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse3 (select (select (store .cse19 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse20 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 .cse2 .cse9))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse12)) (.cse11 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 24))) (let ((.cse10 (select (select (store .cse19 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse20 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 .cse2 .cse3 .cse9))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse11))) (let ((.cse14 (store .cse19 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse20 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 .cse2 .cse3 .cse9 .cse10))))) (let ((.cse16 (select .cse14 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse5 (select .cse16 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse6 (store .cse14 |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse15 (let ((.cse17 (let ((.cse18 (store .cse16 |c_ULTIMATE.start_main_~a~0#1.offset| (+ .cse1 .cse2 .cse3 .cse5 .cse9 .cse10)))) (store .cse18 .cse13 (+ (select .cse16 .cse13) (select (select (store .cse14 |c_ULTIMATE.start_main_~a~0#1.base| .cse18) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))))) (store .cse17 .cse12 (+ (select .cse16 .cse12) (select (select (store .cse14 |c_ULTIMATE.start_main_~a~0#1.base| .cse17) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))))) (store .cse15 .cse11 (+ (select (select (store .cse14 |c_ULTIMATE.start_main_~a~0#1.base| .cse15) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse16 .cse11))))))) (let ((.cse7 (select .cse6 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse8 (select .cse7 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse0 (select (select (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 .cse2 .cse3 .cse5 .cse8 .cse9 .cse10))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse13))) (let ((.cse4 (select (select (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse1 .cse2 .cse3 .cse5 .cse8 .cse9 .cse10))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse12))) (+ .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 (select (select (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse8 .cse9 .cse10))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse11) .cse8 .cse9 .cse10))))))))))))))))))) is different from false [2022-11-03 03:35:59,445 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2022-11-03 03:35:59,446 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:35:59,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299556940] [2022-11-03 03:35:59,446 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:35:59,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362961962] [2022-11-03 03:35:59,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362961962] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:35:59,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [690248462] [2022-11-03 03:35:59,448 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 03:35:59,448 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:35:59,449 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:35:59,449 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:35:59,449 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:35:59,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:59,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:59,561 INFO L356 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-03 03:35:59,561 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 3 case distinctions, treesize of input 29 treesize of output 57 [2022-11-03 03:35:59,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:59,606 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 03:35:59,607 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 92 [2022-11-03 03:35:59,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:59,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:59,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:59,722 INFO L356 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-03 03:35:59,722 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-03 03:35:59,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:59,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:59,764 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-03 03:35:59,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:59,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:59,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:59,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:59,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:59,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:59,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:59,927 INFO L356 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-03 03:35:59,928 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 20 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 415 treesize of output 411 [2022-11-03 03:36:00,053 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 16 treesize of output 12 [2022-11-03 03:36:00,110 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 03:36:00,111 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 03:36:00,195 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 03:36:00,195 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 03:36:00,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:36:00,263 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 03:36:00,263 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 03:36:00,345 INFO L356 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-03 03:36:00,345 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-03 03:36:00,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:36:00,392 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 03:36:00,392 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 03:36:00,468 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 03:36:00,468 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 03:36:00,492 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:36:14,124 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2481#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-03 03:36:14,124 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:36:14,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:36:14,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 43 [2022-11-03 03:36:14,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624326011] [2022-11-03 03:36:14,125 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 03:36:14,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-03 03:36:14,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:36:14,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-03 03:36:14,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1882, Unknown=54, NotChecked=88, Total=2162 [2022-11-03 03:36:14,127 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 43 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 03:37:02,066 WARN L234 SmtUtils]: Spent 9.23s on a formula simplification. DAG size of input: 144 DAG size of output: 107 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:37:04,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 03:37:06,244 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 03:37:08,287 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 03:37:10,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 03:37:12,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 03:37:15,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 03:37:17,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 03:37:20,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 03:37:25,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 03:37:27,458 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse45 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse13 (select .cse45 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse14 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse30 (* 8 |c_ULTIMATE.start_main_~i~0#1|))) (let ((.cse12 (let ((.cse47 (+ .cse30 |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse14 .cse47 (+ .cse13 (select .cse14 .cse47)))))) (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse12))) (let ((.cse8 (select .cse7 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse5 (select .cse8 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse21 (let ((.cse46 (+ .cse30 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse12 .cse46 (+ (select .cse14 .cse46) .cse5))))) (let ((.cse16 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse21))) (let ((.cse10 (+ 16 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse17 (select .cse16 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse15 (select .cse17 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse2 (+ (* c_~N~0 2) (* c_~N~0 c_~N~0))) (.cse1 (select .cse14 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse11 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse9 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 24)) (.cse0 (select .cse14 .cse10))) (and (<= c_~N~0 4) (= .cse0 .cse1) (not (= |c_ULTIMATE.start_main_~#sum~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (= .cse2 (let ((.cse6 (select .cse12 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse3 (select (select (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse8 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse5 .cse6))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse11))) (let ((.cse4 (select (select (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse8 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse3 .cse5 .cse6))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse10))) (+ .cse3 .cse4 .cse5 .cse6 (select (select (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse8 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse3 .cse4 .cse5 .cse6))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse9)))))) (= .cse0 (+ .cse13 1)) (= (select .cse14 .cse11) .cse0) (= .cse2 (let ((.cse20 (select .cse21 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse19 (select (select (store .cse16 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse17 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse15 .cse20))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse11))) (let ((.cse18 (select (select (store .cse16 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse17 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse15 .cse19 .cse20))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse10))) (+ .cse15 (select (select (store .cse16 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse17 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse15 .cse18 .cse19 .cse20))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse9) .cse18 .cse19 .cse20))))) (= (let ((.cse28 (let ((.cse29 (+ .cse30 16 |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse21 .cse29 (+ .cse15 (select .cse14 .cse29)))))) (let ((.cse23 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse28))) (let ((.cse24 (select .cse23 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse25 (select .cse28 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse27 (select .cse24 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse22 (select (select (store .cse23 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse24 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse25 .cse27))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse11))) (let ((.cse26 (select (select (store .cse23 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse24 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse22 .cse25 .cse27))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse10))) (+ .cse22 (select (select (store .cse23 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse24 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse22 .cse25 .cse26 .cse27))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse9) .cse25 .cse26 .cse27))))))) .cse2) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (or (= .cse2 (let ((.cse34 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse45 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse13 .cse1))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse11))) (let ((.cse38 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse45 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse13 .cse34 .cse1))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse10))) (let ((.cse37 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse45 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse13 .cse34 .cse38 .cse1))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse9))) (let ((.cse40 (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse45 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse13 .cse34 .cse37 .cse38 .cse1))))) (let ((.cse42 (select .cse40 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse39 (select .cse42 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse32 (store .cse40 |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse41 (let ((.cse43 (let ((.cse44 (store .cse42 |c_ULTIMATE.start_main_~a~0#1.offset| (+ .cse13 .cse34 .cse37 .cse38 .cse39 .cse1)))) (store .cse44 .cse11 (+ (select .cse42 .cse11) (select (select (store .cse40 |c_ULTIMATE.start_main_~a~0#1.base| .cse44) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))))) (store .cse43 .cse10 (+ (select .cse42 .cse10) (select (select (store .cse40 |c_ULTIMATE.start_main_~a~0#1.base| .cse43) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))))) (store .cse41 .cse9 (+ (select .cse42 .cse9) (select (select (store .cse40 |c_ULTIMATE.start_main_~a~0#1.base| .cse41) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))))) (let ((.cse33 (select .cse32 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse35 (select .cse33 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse31 (select (select (store .cse32 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse33 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse13 .cse34 .cse35 .cse37 .cse38 .cse39 .cse1))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse11))) (let ((.cse36 (select (select (store .cse32 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse33 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse13 .cse31 .cse34 .cse35 .cse37 .cse38 .cse39 .cse1))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse10))) (+ .cse13 .cse31 (select (select (store .cse32 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse33 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse13 .cse31 .cse34 .cse35 .cse36 .cse37 .cse38 .cse39 .cse1))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse9) .cse34 .cse35 .cse36 .cse37 .cse38 .cse39 .cse1))))))))))))) (< |c_ULTIMATE.start_main_~i~0#1| c_~N~0)) (= (* .cse0 2) (+ 5 (select .cse14 .cse9))) (= .cse0 5) (< 3 c_~N~0)))))))))))) is different from false [2022-11-03 03:38:03,288 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 03:38:16,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:38:16,932 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2022-11-03 03:38:16,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-03 03:38:16,933 INFO L78 Accepts]: Start accepts. Automaton has has 43 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) Word has length 24 [2022-11-03 03:38:16,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:38:16,935 INFO L225 Difference]: With dead ends: 53 [2022-11-03 03:38:16,935 INFO L226 Difference]: Without dead ends: 50 [2022-11-03 03:38:16,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 14 SyntacticMatches, 12 SemanticMatches, 51 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 321.1s TimeCoverageRelationStatistics Valid=171, Invalid=2317, Unknown=70, NotChecked=198, Total=2756 [2022-11-03 03:38:16,937 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 23 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 42.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:38:16,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 67 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 647 Invalid, 5 Unknown, 117 Unchecked, 42.5s Time] [2022-11-03 03:38:16,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-03 03:38:16,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2022-11-03 03:38:16,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.275) internal successors, (51), 40 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 03:38:16,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2022-11-03 03:38:16,973 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 24 [2022-11-03 03:38:16,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:38:16,974 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2022-11-03 03:38:16,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 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 03:38:16,974 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2022-11-03 03:38:16,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-03 03:38:16,975 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:38:16,975 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:38:17,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 03:38:17,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:38:17,176 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:38:17,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:38:17,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1216276529, now seen corresponding path program 11 times [2022-11-03 03:38:17,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:38:17,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005329980] [2022-11-03 03:38:17,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:38:17,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:38:17,221 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:38:17,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [206964038] [2022-11-03 03:38:17,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:38:17,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:38:17,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:38:17,223 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:38:17,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 03:38:17,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 03:38:17,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:38:17,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:38:17,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:38:17,718 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 03:38:17,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:38:17,869 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 03:38:17,869 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:38:17,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005329980] [2022-11-03 03:38:17,869 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:38:17,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206964038] [2022-11-03 03:38:17,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206964038] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:38:17,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1789820677] [2022-11-03 03:38:17,871 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 03:38:17,872 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:38:17,872 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:38:17,872 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:38:17,873 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:38:17,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:17,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:17,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:17,995 INFO L356 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-03 03:38:17,996 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-03 03:38:18,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:18,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:18,019 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 29 treesize of output 39 [2022-11-03 03:38:18,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:18,038 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 88 [2022-11-03 03:38:18,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:18,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:18,092 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-11-03 03:38:18,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:18,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:18,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:18,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:18,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:18,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:38:18,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:18,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:18,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:18,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:18,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:18,316 INFO L356 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-11-03 03:38:18,316 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 20 case distinctions, treesize of input 420 treesize of output 410 [2022-11-03 03:38:18,405 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 16 treesize of output 12 [2022-11-03 03:38:18,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:38:18,482 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 03:38:18,483 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 03:38:18,573 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 03:38:18,574 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 03:38:18,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:38:18,646 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 03:38:18,647 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 03:38:18,726 INFO L356 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-03 03:38:18,726 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-03 03:38:18,790 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 03:38:18,790 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 03:38:18,875 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 03:38:18,876 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 03:38:18,904 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:38:19,463 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2835#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-03 03:38:19,463 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:38:19,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:38:19,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-11-03 03:38:19,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93399971] [2022-11-03 03:38:19,464 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 03:38:19,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-03 03:38:19,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:38:19,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-03 03:38:19,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-11-03 03:38:19,466 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 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 03:38:20,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:38:20,163 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2022-11-03 03:38:20,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 03:38:20,165 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 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 03:38:20,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:38:20,166 INFO L225 Difference]: With dead ends: 66 [2022-11-03 03:38:20,166 INFO L226 Difference]: Without dead ends: 53 [2022-11-03 03:38:20,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2022-11-03 03:38:20,168 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 9 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:38:20,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 8 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 03:38:20,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-03 03:38:20,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2022-11-03 03:38:20,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 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 03:38:20,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2022-11-03 03:38:20,205 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 25 [2022-11-03 03:38:20,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:38:20,207 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2022-11-03 03:38:20,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 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 03:38:20,207 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2022-11-03 03:38:20,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-03 03:38:20,210 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:38:20,210 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:38:20,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 03:38:20,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-03 03:38:20,437 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:38:20,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:38:20,437 INFO L85 PathProgramCache]: Analyzing trace with hash 688797510, now seen corresponding path program 12 times [2022-11-03 03:38:20,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:38:20,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982342980] [2022-11-03 03:38:20,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:38:20,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:38:20,463 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:38:20,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1088002079] [2022-11-03 03:38:20,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 03:38:20,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:38:20,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:38:20,465 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:38:20,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 03:38:20,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 03:38:20,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:38:20,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:38:20,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:38:20,730 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 03:38:20,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:38:20,882 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 03:38:20,882 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:38:20,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982342980] [2022-11-03 03:38:20,882 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:38:20,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088002079] [2022-11-03 03:38:20,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088002079] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:38:20,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [53976996] [2022-11-03 03:38:20,885 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 03:38:20,885 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:38:20,885 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:38:20,886 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:38:20,886 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:38:20,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:20,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:20,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:21,021 INFO L356 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-03 03:38:21,021 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-03 03:38:21,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:21,039 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 88 [2022-11-03 03:38:21,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:21,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:21,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 29 treesize of output 39 [2022-11-03 03:38:21,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:21,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:21,105 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-03 03:38:21,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:21,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:21,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:21,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:21,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:21,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:38:21,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:38:21,307 INFO L356 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-03 03:38:21,307 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 20 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 415 treesize of output 411 [2022-11-03 03:38:21,392 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 16 treesize of output 12 [2022-11-03 03:38:21,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:38:21,439 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 03:38:21,439 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 03:38:21,533 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 03:38:21,534 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 03:38:21,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:38:21,608 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 03:38:21,608 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-11-03 03:38:21,703 INFO L356 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-03 03:38:21,703 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-03 03:38:21,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:38:21,778 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 03:38:21,778 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 03:38:21,896 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 03:38:21,896 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 03:38:21,926 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:38:23,039 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3202#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-03 03:38:23,039 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:38:23,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:38:23,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-11-03 03:38:23,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386235527] [2022-11-03 03:38:23,040 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 03:38:23,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-03 03:38:23,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:38:23,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-03 03:38:23,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-11-03 03:38:23,042 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 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 03:38:23,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:38:23,464 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2022-11-03 03:38:23,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 03:38:23,467 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 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 03:38:23,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:38:23,467 INFO L225 Difference]: With dead ends: 60 [2022-11-03 03:38:23,468 INFO L226 Difference]: Without dead ends: 29 [2022-11-03 03:38:23,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 22 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2022-11-03 03:38:23,469 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 6 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:38:23,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 14 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:38:23,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-03 03:38:23,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-03 03:38:23,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:38:23,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2022-11-03 03:38:23,489 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 25 [2022-11-03 03:38:23,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:38:23,489 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2022-11-03 03:38:23,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 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 03:38:23,490 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2022-11-03 03:38:23,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-03 03:38:23,491 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:38:23,491 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:38:23,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-03 03:38:23,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-03 03:38:23,692 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:38:23,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:38:23,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1689346091, now seen corresponding path program 13 times [2022-11-03 03:38:23,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:38:23,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334330289] [2022-11-03 03:38:23,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:38:23,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:38:23,731 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:38:23,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [224300010] [2022-11-03 03:38:23,733 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 03:38:23,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:38:23,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:38:23,735 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:38:23,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b317c3-3152-42c0-aeab-418d6aeca56b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 03:38:23,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:38:23,954 WARN L261 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 136 conjunts are in the unsatisfiable core [2022-11-03 03:38:23,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:38:23,989 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 11 treesize of output 7 [2022-11-03 03:38:24,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-03 03:38:24,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,080 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-03 03:38:24,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,141 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 45 [2022-11-03 03:38:24,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,205 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 60 [2022-11-03 03:38:24,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,291 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 66 [2022-11-03 03:38:24,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:38:24,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,515 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 76 [2022-11-03 03:38:24,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:38:24,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,636 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 79 [2022-11-03 03:38:24,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:38:24,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,804 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 84 [2022-11-03 03:38:24,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:24,958 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 76 [2022-11-03 03:38:25,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:25,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:25,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:25,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:25,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:25,086 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 76 [2022-11-03 03:38:25,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:25,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:25,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:25,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:25,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:25,378 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 76 [2022-11-03 03:38:25,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:25,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:25,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:25,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:25,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:25,563 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 75 [2022-11-03 03:38:25,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:25,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:25,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:25,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:25,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:25,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:25,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:38:25,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:25,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:25,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:25,718 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 78 [2022-11-03 03:38:25,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:25,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:25,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:25,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:25,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:25,873 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 73 [2022-11-03 03:38:26,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:26,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:26,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:26,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:26,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:26,053 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 75 [2022-11-03 03:38:26,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:26,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:26,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:38:26,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:26,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:26,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:26,391 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 76 [2022-11-03 03:38:26,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:26,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:26,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:26,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:26,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:26,582 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 73 [2022-11-03 03:38:26,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:26,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:26,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:26,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:26,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:26,765 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 73 [2022-11-03 03:38:26,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:26,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:26,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:26,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:26,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:26,978 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 73 [2022-11-03 03:38:27,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:27,164 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 66 [2022-11-03 03:38:27,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:27,396 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 50 [2022-11-03 03:38:27,513 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:38:27,513 INFO L328 TraceCheckSpWp]: Computing backward predicates...