./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ss4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/ss4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS --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 cb671fec0d42514b04873418e954f5a2df95ef7f393045434a478c03667a31d2 --- 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-8393723 [2022-11-19 08:11:46,073 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:11:46,075 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:11:46,100 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:11:46,101 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:11:46,102 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:11:46,108 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:11:46,113 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:11:46,116 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:11:46,122 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:11:46,125 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:11:46,127 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:11:46,127 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:11:46,130 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:11:46,133 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:11:46,139 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:11:46,141 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:11:46,142 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:11:46,144 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:11:46,151 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:11:46,153 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:11:46,155 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:11:46,158 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:11:46,159 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:11:46,162 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:11:46,163 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:11:46,163 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:11:46,164 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:11:46,164 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:11:46,165 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:11:46,166 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:11:46,166 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:11:46,167 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:11:46,168 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:11:46,169 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:11:46,169 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:11:46,170 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:11:46,170 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:11:46,175 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:11:46,177 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:11:46,178 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:11:46,179 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 08:11:46,217 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:11:46,217 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:11:46,217 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:11:46,218 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:11:46,218 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:11:46,219 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:11:46,219 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:11:46,219 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:11:46,219 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:11:46,220 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:11:46,220 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:11:46,220 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:11:46,220 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:11:46,221 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:11:46,221 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:11:46,221 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:11:46,221 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:11:46,222 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:11:46,222 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:11:46,223 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:11:46,223 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:11:46,223 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:11:46,223 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:11:46,224 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:11:46,224 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:11:46,224 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:11:46,224 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:11:46,225 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:11:46,225 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:11:46,225 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:11:46,226 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:11:46,226 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:11:46,226 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:11:46,226 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:11:46,227 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:11:46,227 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:11:46,227 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:11:46,227 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:11:46,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:11:46,228 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:11:46,228 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:11:46,228 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_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb671fec0d42514b04873418e954f5a2df95ef7f393045434a478c03667a31d2 [2022-11-19 08:11:46,505 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:11:46,543 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:11:46,546 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:11:46,547 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:11:46,548 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:11:46,549 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/array-fpi/ss4.c [2022-11-19 08:11:46,621 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/data/115f706f4/1672a31b14074e9ca7c73a6039d9ade9/FLAG40cb71d55 [2022-11-19 08:11:47,129 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:11:47,130 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/sv-benchmarks/c/array-fpi/ss4.c [2022-11-19 08:11:47,144 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/data/115f706f4/1672a31b14074e9ca7c73a6039d9ade9/FLAG40cb71d55 [2022-11-19 08:11:47,526 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/data/115f706f4/1672a31b14074e9ca7c73a6039d9ade9 [2022-11-19 08:11:47,529 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:11:47,531 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:11:47,536 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:11:47,537 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:11:47,540 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:11:47,541 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:11:47" (1/1) ... [2022-11-19 08:11:47,543 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2509a49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:11:47, skipping insertion in model container [2022-11-19 08:11:47,543 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:11:47" (1/1) ... [2022-11-19 08:11:47,551 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:11:47,569 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:11:47,788 WARN L234 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_e7e178d3-ef96-44b3-b66b-8222a9056605/sv-benchmarks/c/array-fpi/ss4.c[586,599] [2022-11-19 08:11:47,812 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:11:47,819 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:11:47,831 WARN L234 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_e7e178d3-ef96-44b3-b66b-8222a9056605/sv-benchmarks/c/array-fpi/ss4.c[586,599] [2022-11-19 08:11:47,840 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:11:47,853 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:11:47,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:11:47 WrapperNode [2022-11-19 08:11:47,853 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:11:47,854 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:11:47,854 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:11:47,854 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:11:47,862 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:11:47" (1/1) ... [2022-11-19 08:11:47,869 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:11:47" (1/1) ... [2022-11-19 08:11:47,888 INFO L138 Inliner]: procedures = 17, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 96 [2022-11-19 08:11:47,888 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:11:47,889 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:11:47,889 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:11:47,889 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:11:47,898 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:11:47" (1/1) ... [2022-11-19 08:11:47,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:11:47" (1/1) ... [2022-11-19 08:11:47,901 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:11:47" (1/1) ... [2022-11-19 08:11:47,901 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:11:47" (1/1) ... [2022-11-19 08:11:47,907 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:11:47" (1/1) ... [2022-11-19 08:11:47,911 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:11:47" (1/1) ... [2022-11-19 08:11:47,912 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:11:47" (1/1) ... [2022-11-19 08:11:47,913 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:11:47" (1/1) ... [2022-11-19 08:11:47,915 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:11:47,916 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:11:47,916 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:11:47,916 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:11:47,917 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:11:47" (1/1) ... [2022-11-19 08:11:47,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:11:47,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:11:47,952 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:11:47,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:11:48,006 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:11:48,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:11:48,007 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 08:11:48,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 08:11:48,008 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 08:11:48,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:11:48,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:11:48,008 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 08:11:48,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 08:11:48,134 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:11:48,136 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:11:48,421 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:11:48,477 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:11:48,477 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-19 08:11:48,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:11:48 BoogieIcfgContainer [2022-11-19 08:11:48,480 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:11:48,482 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:11:48,483 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:11:48,486 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:11:48,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:11:47" (1/3) ... [2022-11-19 08:11:48,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65727197 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:11:48, skipping insertion in model container [2022-11-19 08:11:48,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:11:47" (2/3) ... [2022-11-19 08:11:48,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65727197 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:11:48, skipping insertion in model container [2022-11-19 08:11:48,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:11:48" (3/3) ... [2022-11-19 08:11:48,490 INFO L112 eAbstractionObserver]: Analyzing ICFG ss4.c [2022-11-19 08:11:48,509 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:11:48,510 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 08:11:48,575 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:11:48,583 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;@20826e04, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:11:48,583 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 08:11:48,586 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) [2022-11-19 08:11:48,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 08:11:48,593 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:11:48,593 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:11:48,594 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:11:48,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:11:48,602 INFO L85 PathProgramCache]: Analyzing trace with hash -228288665, now seen corresponding path program 1 times [2022-11-19 08:11:48,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:11:48,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9963685] [2022-11-19 08:11:48,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:11:48,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:11:48,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:11:48,869 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:11:48,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9963685] [2022-11-19 08:11:48,874 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-19 08:11:48,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581975063] [2022-11-19 08:11:48,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:11:48,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:11:48,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:11:48,883 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:11:48,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:11:49,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:11:49,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:11:49,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:11:49,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:11:49,119 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:11:49,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581975063] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:11:49,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:11:49,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:11:49,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069636538] [2022-11-19 08:11:49,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:11:49,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:11:49,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:11:49,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:11:49,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:11:49,186 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) [2022-11-19 08:11:49,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:11:49,257 INFO L93 Difference]: Finished difference Result 22 states and 31 transitions. [2022-11-19 08:11:49,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:11:49,260 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 [2022-11-19 08:11:49,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:11:49,266 INFO L225 Difference]: With dead ends: 22 [2022-11-19 08:11:49,267 INFO L226 Difference]: Without dead ends: 10 [2022-11-19 08:11:49,269 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 [2022-11-19 08:11:49,273 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 4 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 [2022-11-19 08:11:49,274 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] [2022-11-19 08:11:49,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-11-19 08:11:49,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-11-19 08:11:49,299 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) [2022-11-19 08:11:49,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2022-11-19 08:11:49,301 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 8 [2022-11-19 08:11:49,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:11:49,301 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2022-11-19 08:11:49,301 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) [2022-11-19 08:11:49,301 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2022-11-19 08:11:49,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 08:11:49,302 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:11:49,303 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:11:49,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 08:11:49,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-19 08:11:49,504 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:11:49,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:11:49,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1111661393, now seen corresponding path program 1 times [2022-11-19 08:11:49,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:11:49,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761739977] [2022-11-19 08:11:49,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:11:49,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:11:49,549 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:11:49,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2002587476] [2022-11-19 08:11:49,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:11:49,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:11:49,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:11:49,552 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:11:49,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 08:11:49,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:11:49,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:11:49,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:11:49,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:11:49,688 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:11:49,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:11:49,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761739977] [2022-11-19 08:11:49,691 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:11:49,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002587476] [2022-11-19 08:11:49,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002587476] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:11:49,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:11:49,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:11:49,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781777960] [2022-11-19 08:11:49,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:11:49,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:11:49,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:11:49,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:11:49,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:11:49,697 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) [2022-11-19 08:11:49,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:11:49,735 INFO L93 Difference]: Finished difference Result 18 states and 25 transitions. [2022-11-19 08:11:49,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:11:49,736 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 [2022-11-19 08:11:49,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:11:49,736 INFO L225 Difference]: With dead ends: 18 [2022-11-19 08:11:49,736 INFO L226 Difference]: Without dead ends: 13 [2022-11-19 08:11:49,737 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 [2022-11-19 08:11:49,738 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 10 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:11:49,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 4 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:11:49,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-19 08:11:49,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-19 08:11:49,743 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) [2022-11-19 08:11:49,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2022-11-19 08:11:49,744 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 9 [2022-11-19 08:11:49,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:11:49,745 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2022-11-19 08:11:49,745 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) [2022-11-19 08:11:49,745 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2022-11-19 08:11:49,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 08:11:49,746 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:11:49,746 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:11:49,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 08:11:49,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:11:49,952 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:11:49,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:11:49,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1860477013, now seen corresponding path program 1 times [2022-11-19 08:11:49,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:11:49,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106172197] [2022-11-19 08:11:49,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:11:49,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:11:50,001 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:11:50,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1842799205] [2022-11-19 08:11:50,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:11:50,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:11:50,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:11:50,009 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:11:50,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 08:11:50,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:11:50,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-19 08:11:50,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:11:50,144 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:11:50,161 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:11:50,197 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:11:50,294 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:11:50,379 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:11:50,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 23 [2022-11-19 08:11:50,497 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:11:50,609 INFO L350 Elim1Store]: Elim1 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 31 [2022-11-19 08:11:50,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:11:50,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:11:55,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:11:55,198 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:11:55,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106172197] [2022-11-19 08:11:55,198 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:11:55,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842799205] [2022-11-19 08:11:55,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842799205] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:11:55,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2001146464] [2022-11-19 08:11:55,218 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:11:55,218 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:11:55,222 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:11:55,228 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:11:55,228 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:11:55,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:11:55,329 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-19 08:11:55,330 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:11:55,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:11:55,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:11:55,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:11:55,457 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-19 08:11:55,458 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:11:55,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:11:55,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:11:55,510 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:11:55,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:11:55,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:11:55,626 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:11:55,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:11:55,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:11:55,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:11:55,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:11:55,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:11:55,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:11:55,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:11:55,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:11:55,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:11:55,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:11:55,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:11:55,898 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-11-19 08:11:55,902 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:11:56,056 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:11:56,110 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-19 08:11:56,111 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:11:56,217 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-19 08:11:56,218 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:11:56,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:11:56,307 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-19 08:11:56,309 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:11:56,425 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-19 08:11:56,425 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:11:56,468 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:11:56,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:11:56,522 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-19 08:11:56,522 INFO L350 Elim1Store]: Elim1 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 34 treesize of output 33 [2022-11-19 08:11:56,615 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-19 08:11:56,615 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:11:56,653 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:11:57,488 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '249#(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) (<= 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) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem16#1| (+ ~N~0 (* ~N~0 ~N~0))) 1 0)) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-19 08:11:57,488 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:11:57,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:11:57,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-11-19 08:11:57,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962797827] [2022-11-19 08:11:57,489 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:11:57,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-19 08:11:57,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:11:57,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-19 08:11:57,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=479, Unknown=1, NotChecked=0, Total=552 [2022-11-19 08:11:57,491 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 20 states, 20 states have (on average 1.1) internal successors, (22), 20 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) [2022-11-19 08:11:58,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:11:58,341 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2022-11-19 08:11:58,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 08:11:58,342 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.1) internal successors, (22), 20 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 12 [2022-11-19 08:11:58,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:11:58,343 INFO L225 Difference]: With dead ends: 27 [2022-11-19 08:11:58,343 INFO L226 Difference]: Without dead ends: 21 [2022-11-19 08:11:58,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=88, Invalid=613, Unknown=1, NotChecked=0, Total=702 [2022-11-19 08:11:58,344 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:11:58,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 23 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 156 Invalid, 0 Unknown, 13 Unchecked, 0.4s Time] [2022-11-19 08:11:58,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-19 08:11:58,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2022-11-19 08:11:58,352 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) [2022-11-19 08:11:58,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2022-11-19 08:11:58,353 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 12 [2022-11-19 08:11:58,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:11:58,353 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2022-11-19 08:11:58,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.1) internal successors, (22), 20 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) [2022-11-19 08:11:58,354 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2022-11-19 08:11:58,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 08:11:58,355 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:11:58,355 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:11:58,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 08:11:58,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:11:58,561 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:11:58,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:11:58,562 INFO L85 PathProgramCache]: Analyzing trace with hash -689266881, now seen corresponding path program 2 times [2022-11-19 08:11:58,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:11:58,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482840201] [2022-11-19 08:11:58,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:11:58,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:11:58,600 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:11:58,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2063063906] [2022-11-19 08:11:58,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:11:58,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:11:58,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:11:58,602 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:11:58,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 08:11:58,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 08:11:58,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:11:58,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 08:11:58,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:11:58,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:11:58,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:11:58,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:11:58,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:11:58,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482840201] [2022-11-19 08:11:58,775 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:11:58,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063063906] [2022-11-19 08:11:58,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063063906] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:11:58,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1584141762] [2022-11-19 08:11:58,778 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:11:58,778 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:11:58,778 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:11:58,779 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:11:58,779 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:11:58,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:11:58,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:11:58,881 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-19 08:11:58,881 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:11:58,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:11:58,921 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-19 08:11:58,921 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:11:58,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:11:58,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:11:58,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:11:59,040 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-19 08:11:59,040 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:11:59,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:11:59,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:11:59,091 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:11:59,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:11:59,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:11:59,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:11:59,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:11:59,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:11:59,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:11:59,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:11:59,297 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-19 08:11:59,298 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:11:59,415 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:11:59,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:11:59,479 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-19 08:11:59,480 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:11:59,561 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-19 08:11:59,561 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:11:59,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:11:59,631 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-19 08:11:59,631 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:11:59,721 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-19 08:11:59,722 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:11:59,744 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:11:59,779 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 08:11:59,783 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 28 [2022-11-19 08:11:59,867 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-19 08:11:59,868 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:11:59,957 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-19 08:11:59,958 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:11:59,978 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:12:00,336 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '418#(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) (<= 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) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem16#1| (+ ~N~0 (* ~N~0 ~N~0))) 1 0)) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-19 08:12:00,336 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:12:00,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:12:00,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-19 08:12:00,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491732128] [2022-11-19 08:12:00,337 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:12:00,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 08:12:00,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:00,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 08:12:00,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-19 08:12:00,338 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) [2022-11-19 08:12:00,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:00,519 INFO L93 Difference]: Finished difference Result 31 states and 41 transitions. [2022-11-19 08:12:00,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:12:00,520 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 [2022-11-19 08:12:00,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:00,520 INFO L225 Difference]: With dead ends: 31 [2022-11-19 08:12:00,520 INFO L226 Difference]: Without dead ends: 24 [2022-11-19 08:12:00,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-19 08:12:00,521 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 12 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:00,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 8 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:12:00,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-19 08:12:00,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2022-11-19 08:12:00,534 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) [2022-11-19 08:12:00,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2022-11-19 08:12:00,536 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 13 [2022-11-19 08:12:00,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:00,537 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2022-11-19 08:12:00,537 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) [2022-11-19 08:12:00,538 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2022-11-19 08:12:00,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 08:12:00,540 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:00,540 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:00,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 08:12:00,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:00,748 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:00,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:00,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1839906970, now seen corresponding path program 3 times [2022-11-19 08:12:00,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:00,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594421439] [2022-11-19 08:12:00,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:00,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:00,785 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:12:00,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1714044744] [2022-11-19 08:12:00,800 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:12:00,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:00,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:00,801 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:12:00,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 08:12:00,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:12:00,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:12:00,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 08:12:00,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:12:00,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:12:00,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:12:00,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:12:00,954 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:00,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594421439] [2022-11-19 08:12:00,954 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:12:00,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714044744] [2022-11-19 08:12:00,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714044744] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:12:00,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [411236974] [2022-11-19 08:12:00,959 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:12:00,959 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:12:00,960 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:12:00,960 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:12:00,960 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:12:00,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:01,006 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-19 08:12:01,006 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:01,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:01,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:01,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:01,110 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-19 08:12:01,111 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:01,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:01,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:01,139 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:01,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:01,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:01,204 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:01,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:01,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:01,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:01,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:01,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:01,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:12:01,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:12:01,403 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-19 08:12:01,404 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:01,586 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:01,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:12:01,669 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-19 08:12:01,670 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:01,756 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-19 08:12:01,756 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:01,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:12:01,827 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-19 08:12:01,827 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:01,911 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-19 08:12:01,911 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:01,936 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:01,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:12:01,981 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 08:12:01,982 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 28 [2022-11-19 08:12:02,062 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-19 08:12:02,062 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:02,091 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:12:02,485 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '602#(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) (<= 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) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem16#1| (+ ~N~0 (* ~N~0 ~N~0))) 1 0)) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-19 08:12:02,485 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:12:02,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:12:02,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-19 08:12:02,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733885559] [2022-11-19 08:12:02,486 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:12:02,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 08:12:02,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:02,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 08:12:02,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-19 08:12:02,487 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) [2022-11-19 08:12:02,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:02,581 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2022-11-19 08:12:02,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:12:02,582 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 [2022-11-19 08:12:02,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:02,583 INFO L225 Difference]: With dead ends: 33 [2022-11-19 08:12:02,583 INFO L226 Difference]: Without dead ends: 17 [2022-11-19 08:12:02,583 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 [2022-11-19 08:12:02,584 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:02,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 8 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:12:02,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-19 08:12:02,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-19 08:12:02,592 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) [2022-11-19 08:12:02,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-11-19 08:12:02,595 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 13 [2022-11-19 08:12:02,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:02,595 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-11-19 08:12:02,595 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) [2022-11-19 08:12:02,595 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-11-19 08:12:02,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-19 08:12:02,596 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:02,597 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:02,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 08:12:02,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:02,802 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:02,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:02,803 INFO L85 PathProgramCache]: Analyzing trace with hash 664323303, now seen corresponding path program 4 times [2022-11-19 08:12:02,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:02,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694986415] [2022-11-19 08:12:02,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:02,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:02,852 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:12:02,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [450487113] [2022-11-19 08:12:02,885 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 08:12:02,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:02,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:02,887 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:12:02,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 08:12:02,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:02,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-19 08:12:02,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:12:03,004 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:03,009 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:03,036 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:03,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:03,072 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:03,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:03,137 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:03,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:03,177 INFO L350 Elim1Store]: Elim1 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 51 treesize of output 35 [2022-11-19 08:12:03,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:12:03,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:03,274 INFO L350 Elim1Store]: Elim1 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 75 treesize of output 44 [2022-11-19 08:12:03,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:03,324 INFO L350 Elim1Store]: Elim1 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 61 treesize of output 39 [2022-11-19 08:12:03,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:03,378 INFO L350 Elim1Store]: Elim1 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 57 treesize of output 41 [2022-11-19 08:12:03,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:12:03,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:03,437 INFO L350 Elim1Store]: Elim1 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 58 treesize of output 44 [2022-11-19 08:12:03,498 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:03,579 INFO L350 Elim1Store]: Elim1 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 80 treesize of output 44 [2022-11-19 08:12:03,610 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:12:03,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:12:08,445 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:12:08,446 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:08,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694986415] [2022-11-19 08:12:08,446 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:12:08,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450487113] [2022-11-19 08:12:08,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450487113] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:12:08,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1107447170] [2022-11-19 08:12:08,449 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:12:08,449 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:12:08,449 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:12:08,449 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:12:08,450 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:12:08,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:08,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:08,546 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-19 08:12:08,547 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:08,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:08,581 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-19 08:12:08,582 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:08,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:08,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:08,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:08,689 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-19 08:12:08,689 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:08,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:08,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:08,730 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:08,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:08,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:08,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:08,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:08,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:08,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:12:08,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:12:08,970 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-19 08:12:08,970 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:09,091 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:09,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:12:09,159 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-19 08:12:09,160 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:09,250 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-19 08:12:09,250 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:09,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:12:09,313 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-19 08:12:09,314 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:09,392 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-19 08:12:09,392 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:09,412 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:09,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:12:09,442 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-19 08:12:09,442 INFO L350 Elim1Store]: Elim1 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 34 treesize of output 33 [2022-11-19 08:12:09,519 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-19 08:12:09,519 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:09,595 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-19 08:12:09,596 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:09,631 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:12:10,388 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '815#(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) (<= 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) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem16#1| (+ ~N~0 (* ~N~0 ~N~0))) 1 0)) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-19 08:12:10,388 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:12:10,388 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:12:10,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-11-19 08:12:10,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494247468] [2022-11-19 08:12:10,389 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:12:10,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-19 08:12:10,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:10,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-19 08:12:10,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2022-11-19 08:12:10,391 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 28 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:13,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:13,887 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2022-11-19 08:12:13,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-19 08:12:13,888 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-19 08:12:13,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:13,889 INFO L225 Difference]: With dead ends: 42 [2022-11-19 08:12:13,889 INFO L226 Difference]: Without dead ends: 38 [2022-11-19 08:12:13,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=123, Invalid=1209, Unknown=0, NotChecked=0, Total=1332 [2022-11-19 08:12:13,891 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 7 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 213 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:13,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 38 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 120 Invalid, 0 Unknown, 213 Unchecked, 0.1s Time] [2022-11-19 08:12:13,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-19 08:12:13,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2022-11-19 08:12:13,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.34375) internal successors, (43), 32 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:13,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-11-19 08:12:13,931 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 16 [2022-11-19 08:12:13,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:13,932 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-11-19 08:12:13,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:13,932 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-11-19 08:12:13,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-19 08:12:13,933 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:13,933 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:13,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 08:12:14,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-19 08:12:14,139 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:14,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:14,139 INFO L85 PathProgramCache]: Analyzing trace with hash -881119672, now seen corresponding path program 5 times [2022-11-19 08:12:14,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:14,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723833365] [2022-11-19 08:12:14,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:14,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:14,173 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:12:14,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [386333074] [2022-11-19 08:12:14,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:12:14,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:14,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:14,181 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:12:14,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 08:12:14,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 08:12:14,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:12:14,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:12:14,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:12:14,379 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:12:14,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:12:14,441 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:12:14,441 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:14,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723833365] [2022-11-19 08:12:14,441 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:12:14,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386333074] [2022-11-19 08:12:14,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386333074] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:12:14,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [220147984] [2022-11-19 08:12:14,443 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:12:14,443 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:12:14,443 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:12:14,443 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:12:14,444 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:12:14,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:14,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:14,538 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-19 08:12:14,539 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:14,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:14,573 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-19 08:12:14,573 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:14,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:14,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:14,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:14,692 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-19 08:12:14,692 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:14,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:14,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:14,744 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:14,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:14,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:14,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:14,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:14,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:14,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:12:14,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:12:14,914 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-19 08:12:14,914 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:15,023 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:15,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:12:15,080 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-19 08:12:15,081 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:15,156 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-19 08:12:15,156 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:15,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:12:15,215 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-19 08:12:15,215 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:15,320 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-19 08:12:15,321 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:15,343 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:15,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:12:15,382 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 08:12:15,383 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 28 [2022-11-19 08:12:15,456 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-19 08:12:15,457 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:15,487 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:12:15,877 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1073#(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) (<= 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) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem16#1| (+ ~N~0 (* ~N~0 ~N~0))) 1 0)) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-19 08:12:15,877 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:12:15,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:12:15,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-19 08:12:15,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944292004] [2022-11-19 08:12:15,878 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:12:15,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-19 08:12:15,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:15,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-19 08:12:15,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-19 08:12:15,879 INFO L87 Difference]: Start difference. First operand 33 states and 43 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) [2022-11-19 08:12:16,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:16,065 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2022-11-19 08:12:16,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 08:12:16,066 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 [2022-11-19 08:12:16,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:16,067 INFO L225 Difference]: With dead ends: 62 [2022-11-19 08:12:16,067 INFO L226 Difference]: Without dead ends: 38 [2022-11-19 08:12:16,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2022-11-19 08:12:16,068 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 19 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:16,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 12 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:12:16,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-19 08:12:16,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2022-11-19 08:12:16,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:16,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2022-11-19 08:12:16,087 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 17 [2022-11-19 08:12:16,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:16,087 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2022-11-19 08:12:16,088 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) [2022-11-19 08:12:16,088 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2022-11-19 08:12:16,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-19 08:12:16,089 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:16,089 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:16,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 08:12:16,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-19 08:12:16,294 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:16,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:16,295 INFO L85 PathProgramCache]: Analyzing trace with hash -231139271, now seen corresponding path program 6 times [2022-11-19 08:12:16,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:16,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381977822] [2022-11-19 08:12:16,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:16,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:16,317 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:12:16,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [409571025] [2022-11-19 08:12:16,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:12:16,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:16,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:16,319 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:12:16,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 08:12:16,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:12:16,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:12:16,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:12:16,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:12:16,472 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 08:12:16,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:12:16,528 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 08:12:16,529 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:16,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381977822] [2022-11-19 08:12:16,529 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:12:16,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409571025] [2022-11-19 08:12:16,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409571025] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:12:16,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1403998971] [2022-11-19 08:12:16,534 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:12:16,535 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:12:16,535 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:12:16,535 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:12:16,535 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:12:16,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:16,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:16,621 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-19 08:12:16,622 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:16,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:16,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:16,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:16,715 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-19 08:12:16,715 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:16,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:16,735 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:16,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:16,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:16,779 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:16,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:16,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:16,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:16,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:16,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:16,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:12:16,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:12:16,960 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-19 08:12:16,961 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:17,075 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:17,103 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:12:17,126 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-19 08:12:17,126 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:17,201 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-19 08:12:17,201 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:17,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:12:17,265 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-19 08:12:17,265 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:17,334 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-19 08:12:17,335 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:17,366 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:17,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:12:17,399 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-19 08:12:17,400 INFO L350 Elim1Store]: Elim1 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 34 treesize of output 33 [2022-11-19 08:12:17,478 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-19 08:12:17,479 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:17,501 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:12:17,847 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1366#(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) (<= 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) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem16#1| (+ ~N~0 (* ~N~0 ~N~0))) 1 0)) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-19 08:12:17,847 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:12:17,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:12:17,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-19 08:12:17,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677447090] [2022-11-19 08:12:17,848 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:12:17,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-19 08:12:17,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:17,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-19 08:12:17,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-11-19 08:12:17,850 INFO L87 Difference]: Start difference. First operand 31 states and 38 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) [2022-11-19 08:12:18,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:18,016 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2022-11-19 08:12:18,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:12:18,016 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 18 [2022-11-19 08:12:18,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:18,017 INFO L225 Difference]: With dead ends: 35 [2022-11-19 08:12:18,017 INFO L226 Difference]: Without dead ends: 26 [2022-11-19 08:12:18,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2022-11-19 08:12:18,018 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 20 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:18,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 8 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:12:18,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-19 08:12:18,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2022-11-19 08:12:18,027 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) [2022-11-19 08:12:18,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-11-19 08:12:18,028 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 18 [2022-11-19 08:12:18,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:18,028 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-11-19 08:12:18,028 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) [2022-11-19 08:12:18,029 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-11-19 08:12:18,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-19 08:12:18,029 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:18,029 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:18,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 08:12:18,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:18,235 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:18,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:18,235 INFO L85 PathProgramCache]: Analyzing trace with hash 449636693, now seen corresponding path program 7 times [2022-11-19 08:12:18,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:18,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439068993] [2022-11-19 08:12:18,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:18,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:18,271 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:12:18,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [535698643] [2022-11-19 08:12:18,287 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 08:12:18,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:18,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:18,299 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:12:18,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 08:12:18,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:18,432 WARN L261 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-19 08:12:18,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:12:18,444 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:18,449 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:18,464 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:18,505 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:18,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:18,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:18,544 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:18,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:18,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:18,649 INFO L350 Elim1Store]: Elim1 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 54 treesize of output 47 [2022-11-19 08:12:18,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:18,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:18,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:18,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:18,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:12:18,720 INFO L350 Elim1Store]: Elim1 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 50 [2022-11-19 08:12:18,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:18,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:18,781 INFO L350 Elim1Store]: Elim1 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 64 treesize of output 49 [2022-11-19 08:12:18,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:18,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:18,926 INFO L350 Elim1Store]: Elim1 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 75 treesize of output 52 [2022-11-19 08:12:19,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:19,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:19,010 INFO L350 Elim1Store]: Elim1 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 85 treesize of output 54 [2022-11-19 08:12:19,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:19,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:19,085 INFO L350 Elim1Store]: Elim1 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 53 [2022-11-19 08:12:19,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:19,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:19,170 INFO L350 Elim1Store]: Elim1 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 68 treesize of output 51 [2022-11-19 08:12:19,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:19,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:12:19,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:19,236 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:19,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:19,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:19,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:12:19,331 INFO L350 Elim1Store]: Elim1 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 68 treesize of output 55 [2022-11-19 08:12:19,405 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:12:19,474 INFO L350 Elim1Store]: Elim1 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 61 treesize of output 37 [2022-11-19 08:12:19,513 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:12:19,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:13:45,847 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:13:45,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:13:45,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439068993] [2022-11-19 08:13:45,847 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:13:45,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535698643] [2022-11-19 08:13:45,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535698643] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:13:45,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [43209354] [2022-11-19 08:13:45,849 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:13:45,849 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:13:45,850 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:13:45,850 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:13:45,850 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:13:45,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:45,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:45,941 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-19 08:13:45,941 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:13:45,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:45,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:45,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:46,040 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-19 08:13:46,040 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:13:46,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:46,078 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:13:46,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:46,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:46,137 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:13:46,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:46,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:46,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:46,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:46,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:46,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:13:46,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:46,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:46,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:46,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:46,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:46,310 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-11-19 08:13:46,311 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:13:46,390 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:13:46,430 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-19 08:13:46,430 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:13:46,507 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-19 08:13:46,507 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:13:46,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:13:46,574 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-19 08:13:46,575 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:13:46,648 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-19 08:13:46,648 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:13:46,678 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:13:46,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:13:46,720 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 08:13:46,720 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 28 [2022-11-19 08:13:46,792 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-19 08:13:46,792 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:13:46,830 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:13:50,992 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1630#(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) (<= 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) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem16#1| (+ ~N~0 (* ~N~0 ~N~0))) 1 0)) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-19 08:13:50,992 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:13:50,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:13:50,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2022-11-19 08:13:50,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85935753] [2022-11-19 08:13:50,993 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:13:50,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-19 08:13:50,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:13:50,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-19 08:13:50,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1424, Unknown=13, NotChecked=0, Total=1560 [2022-11-19 08:13:50,995 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 36 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:33,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:14:33,618 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2022-11-19 08:14:33,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-19 08:14:33,619 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-19 08:14:33,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:14:33,621 INFO L225 Difference]: With dead ends: 45 [2022-11-19 08:14:33,621 INFO L226 Difference]: Without dead ends: 37 [2022-11-19 08:14:33,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 8 SyntacticMatches, 12 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 126.4s TimeCoverageRelationStatistics Valid=166, Invalid=1888, Unknown=16, NotChecked=0, Total=2070 [2022-11-19 08:14:33,623 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-11-19 08:14:33,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 53 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 466 Invalid, 0 Unknown, 97 Unchecked, 5.9s Time] [2022-11-19 08:14:33,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-19 08:14:33,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2022-11-19 08:14:33,641 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) [2022-11-19 08:14:33,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2022-11-19 08:14:33,642 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 20 [2022-11-19 08:14:33,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:14:33,642 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2022-11-19 08:14:33,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:33,643 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2022-11-19 08:14:33,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-19 08:14:33,643 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:14:33,643 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:14:33,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 08:14:33,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-19 08:14:33,844 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:14:33,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:14:33,845 INFO L85 PathProgramCache]: Analyzing trace with hash 444751423, now seen corresponding path program 8 times [2022-11-19 08:14:33,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:14:33,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198657264] [2022-11-19 08:14:33,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:33,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:14:33,870 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:14:33,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1905769009] [2022-11-19 08:14:33,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:14:33,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:14:33,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:14:33,880 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:14:33,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 08:14:34,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 08:14:34,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:14:34,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 08:14:34,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:34,108 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 08:14:34,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:14:34,188 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 08:14:34,188 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:14:34,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198657264] [2022-11-19 08:14:34,189 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:14:34,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905769009] [2022-11-19 08:14:34,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905769009] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:14:34,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [668646597] [2022-11-19 08:14:34,191 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:14:34,191 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:14:34,191 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:14:34,192 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:14:34,192 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:14:34,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:34,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:34,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:34,297 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-19 08:14:34,297 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:14:34,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:34,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:34,314 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:14:34,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:34,331 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:14:34,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:34,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:34,365 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:14:34,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:34,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:34,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:34,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:34,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:34,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:14:34,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:34,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:34,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:34,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:34,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:34,532 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-11-19 08:14:34,532 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:14:34,610 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:14:34,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:14:34,652 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-19 08:14:34,653 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:14:34,719 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-19 08:14:34,720 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:14:34,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:14:34,779 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-19 08:14:34,779 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:14:34,860 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-19 08:14:34,861 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:14:34,876 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:14:34,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:14:34,911 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-19 08:14:34,912 INFO L350 Elim1Store]: Elim1 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 34 treesize of output 33 [2022-11-19 08:14:34,976 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-19 08:14:34,977 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:14:35,051 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-19 08:14:35,051 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:14:35,068 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:14:35,440 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1919#(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) (<= 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) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem16#1| (+ ~N~0 (* ~N~0 ~N~0))) 1 0)) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-19 08:14:35,440 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:14:35,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:14:35,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-11-19 08:14:35,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951150241] [2022-11-19 08:14:35,444 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:14:35,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-19 08:14:35,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:14:35,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-19 08:14:35,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-11-19 08:14:35,447 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) [2022-11-19 08:14:35,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:14:35,763 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2022-11-19 08:14:35,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 08:14:35,764 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 [2022-11-19 08:14:35,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:14:35,764 INFO L225 Difference]: With dead ends: 51 [2022-11-19 08:14:35,765 INFO L226 Difference]: Without dead ends: 40 [2022-11-19 08:14:35,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 35 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2022-11-19 08:14:35,766 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 12 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:14:35,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 12 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:14:35,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-19 08:14:35,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2022-11-19 08:14:35,786 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) [2022-11-19 08:14:35,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2022-11-19 08:14:35,787 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 21 [2022-11-19 08:14:35,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:14:35,787 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2022-11-19 08:14:35,788 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) [2022-11-19 08:14:35,788 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2022-11-19 08:14:35,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-19 08:14:35,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:14:35,788 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:14:35,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 08:14:35,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-19 08:14:35,994 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:14:35,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:14:35,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1053530010, now seen corresponding path program 9 times [2022-11-19 08:14:35,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:14:35,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007875756] [2022-11-19 08:14:35,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:35,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:14:36,017 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:14:36,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [804175619] [2022-11-19 08:14:36,018 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:14:36,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:14:36,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:14:36,019 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:14:36,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 08:14:36,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:14:36,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:14:36,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 08:14:36,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:36,212 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 08:14:36,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:14:36,289 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 08:14:36,290 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:14:36,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007875756] [2022-11-19 08:14:36,290 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:14:36,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804175619] [2022-11-19 08:14:36,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804175619] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:14:36,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [256093497] [2022-11-19 08:14:36,292 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:14:36,292 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:14:36,293 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:14:36,293 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:14:36,293 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:14:36,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:36,332 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-19 08:14:36,332 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:14:36,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:36,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:36,425 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-19 08:14:36,425 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:14:36,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:36,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:36,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:36,531 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-19 08:14:36,532 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:14:36,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:36,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:36,569 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:14:36,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:36,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:36,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:36,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:36,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:36,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:14:36,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:14:36,705 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-19 08:14:36,705 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:14:36,863 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:14:36,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:14:36,923 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-19 08:14:36,923 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:14:36,997 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-19 08:14:36,998 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:14:37,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:14:37,067 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-19 08:14:37,067 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:14:37,136 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-19 08:14:37,137 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:14:37,161 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:14:37,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:14:37,191 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-19 08:14:37,191 INFO L350 Elim1Store]: Elim1 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 34 treesize of output 33 [2022-11-19 08:14:37,254 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-19 08:14:37,254 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:14:37,321 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-19 08:14:37,321 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:14:37,337 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:14:37,677 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2225#(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) (<= 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) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem16#1| (+ ~N~0 (* ~N~0 ~N~0))) 1 0)) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-19 08:14:37,677 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:14:37,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:14:37,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-11-19 08:14:37,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39428247] [2022-11-19 08:14:37,678 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:14:37,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-19 08:14:37,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:14:37,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-19 08:14:37,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-11-19 08:14:37,679 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) [2022-11-19 08:14:37,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:14:37,909 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2022-11-19 08:14:37,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 08:14:37,915 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 [2022-11-19 08:14:37,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:14:37,918 INFO L225 Difference]: With dead ends: 51 [2022-11-19 08:14:37,918 INFO L226 Difference]: Without dead ends: 25 [2022-11-19 08:14:37,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2022-11-19 08:14:37,920 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:14:37,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 16 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:14:37,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-19 08:14:37,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-19 08:14:37,941 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) [2022-11-19 08:14:37,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-11-19 08:14:37,942 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 21 [2022-11-19 08:14:37,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:14:37,942 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-11-19 08:14:37,942 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) [2022-11-19 08:14:37,942 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-11-19 08:14:37,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 08:14:37,943 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:14:37,943 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:14:37,951 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-19 08:14:38,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:14:38,147 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:14:38,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:14:38,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1463476839, now seen corresponding path program 10 times [2022-11-19 08:14:38,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:14:38,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989483411] [2022-11-19 08:14:38,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:38,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:14:38,191 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:14:38,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1214928678] [2022-11-19 08:14:38,192 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 08:14:38,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:14:38,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:14:38,202 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:14:38,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 08:14:38,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:38,342 WARN L261 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 121 conjunts are in the unsatisfiable core [2022-11-19 08:14:38,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:38,357 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:14:38,362 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:14:38,382 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:14:38,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:38,413 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:14:38,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:38,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:38,453 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:14:38,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:38,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:38,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:38,507 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:14:38,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:38,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:14:38,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:38,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:38,651 INFO L350 Elim1Store]: Elim1 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 68 treesize of output 64 [2022-11-19 08:14:38,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:38,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:38,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:14:38,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:38,726 INFO L350 Elim1Store]: Elim1 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 82 treesize of output 67 [2022-11-19 08:14:38,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:38,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:38,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:38,823 INFO L350 Elim1Store]: Elim1 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 85 treesize of output 63 [2022-11-19 08:14:38,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:38,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:38,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:38,904 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:14:39,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:39,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:14:39,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:39,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:39,048 INFO L350 Elim1Store]: Elim1 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 73 treesize of output 64 [2022-11-19 08:14:39,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:39,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:39,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:14:39,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:39,158 INFO L350 Elim1Store]: Elim1 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 78 treesize of output 67 [2022-11-19 08:14:39,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:39,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:39,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:39,248 INFO L350 Elim1Store]: Elim1 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 75 treesize of output 61 [2022-11-19 08:14:39,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:39,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:39,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:39,350 INFO L350 Elim1Store]: Elim1 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 73 treesize of output 61 [2022-11-19 08:14:39,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:39,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:39,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:39,441 INFO L350 Elim1Store]: Elim1 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 67 treesize of output 59 [2022-11-19 08:14:39,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:39,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:39,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:39,539 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:14:39,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:39,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:39,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:39,638 INFO L350 Elim1Store]: Elim1 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 69 treesize of output 59 [2022-11-19 08:14:39,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:39,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:39,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:39,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:39,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:14:39,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:39,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:39,744 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:14:39,842 INFO L350 Elim1Store]: Elim1 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 55 [2022-11-19 08:14:39,943 INFO L350 Elim1Store]: Elim1 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 85 treesize of output 45 [2022-11-19 08:14:39,989 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:39,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:19:02,467 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:19:02,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:19:02,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989483411] [2022-11-19 08:19:02,468 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:19:02,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214928678] [2022-11-19 08:19:02,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214928678] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:19:02,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [286119013] [2022-11-19 08:19:02,470 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:19:02,470 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:19:02,470 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:19:02,470 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:19:02,470 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:19:02,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:19:02,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:19:02,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:19:02,580 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-19 08:19:02,581 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:19:02,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:19:02,598 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:19:02,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:19:02,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:19:02,618 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:19:02,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:19:02,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:19:02,650 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:19:02,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:19:02,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:19:02,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:19:02,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:19:02,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:19:02,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:19:02,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:19:02,823 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-19 08:19:02,824 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:19:02,910 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:19:02,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:19:02,973 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-19 08:19:02,974 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:19:03,054 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-19 08:19:03,054 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:19:03,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:19:03,125 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-19 08:19:03,126 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:19:03,218 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-19 08:19:03,218 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:19:03,241 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:19:03,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:19:03,286 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 08:19:03,286 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 28 [2022-11-19 08:19:03,362 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-19 08:19:03,362 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:19:03,385 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:19:07,241 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2558#(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) (<= 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) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem16#1| (+ ~N~0 (* ~N~0 ~N~0))) 1 0)) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-19 08:19:07,241 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:19:07,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:19:07,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2022-11-19 08:19:07,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364821047] [2022-11-19 08:19:07,241 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:19:07,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-19 08:19:07,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:19:07,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-19 08:19:07,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=2056, Unknown=49, NotChecked=0, Total=2256 [2022-11-19 08:19:07,244 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 44 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:19:53,066 WARN L233 SmtUtils]: Spent 5.19s on a formula simplification. DAG size of input: 147 DAG size of output: 106 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:19:57,128 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:19:58,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:20:01,381 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:21:01,296 WARN L233 SmtUtils]: Spent 14.09s on a formula simplification. DAG size of input: 184 DAG size of output: 100 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:21:44,188 WARN L233 SmtUtils]: Spent 7.81s on a formula simplification. DAG size of input: 157 DAG size of output: 93 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:22:54,938 WARN L233 SmtUtils]: Spent 5.42s on a formula simplification. DAG size of input: 170 DAG size of output: 110 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:22:55,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:22:55,091 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2022-11-19 08:22:55,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-19 08:22:55,092 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-19 08:22:55,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:22:55,092 INFO L225 Difference]: With dead ends: 54 [2022-11-19 08:22:55,092 INFO L226 Difference]: Without dead ends: 45 [2022-11-19 08:22:55,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 461.2s TimeCoverageRelationStatistics Valid=207, Invalid=2679, Unknown=84, NotChecked=0, Total=2970 [2022-11-19 08:22:55,094 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 46 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 27.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:22:55,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 56 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 628 Invalid, 2 Unknown, 139 Unchecked, 27.1s Time] [2022-11-19 08:22:55,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-19 08:22:55,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2022-11-19 08:22:55,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:22:55,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2022-11-19 08:22:55,120 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 24 [2022-11-19 08:22:55,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:22:55,120 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2022-11-19 08:22:55,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:22:55,120 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2022-11-19 08:22:55,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-19 08:22:55,121 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:22:55,121 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:22:55,127 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-19 08:22:55,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:22:55,322 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:22:55,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:22:55,322 INFO L85 PathProgramCache]: Analyzing trace with hash -470298031, now seen corresponding path program 11 times [2022-11-19 08:22:55,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:22:55,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312222672] [2022-11-19 08:22:55,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:22:55,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:22:55,345 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:22:55,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [786852449] [2022-11-19 08:22:55,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:22:55,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:22:55,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:22:55,347 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:22:55,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 08:22:55,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-19 08:22:55,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:22:55,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 08:22:55,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:22:55,986 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 08:22:55,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:22:56,117 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 08:22:56,117 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:22:56,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312222672] [2022-11-19 08:22:56,117 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:22:56,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786852449] [2022-11-19 08:22:56,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786852449] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:22:56,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2142334639] [2022-11-19 08:22:56,119 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:22:56,119 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:22:56,119 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:22:56,120 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:22:56,120 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:22:56,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:22:56,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:22:56,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:22:56,235 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-19 08:22:56,236 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:22:56,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:22:56,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:22:56,264 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:22:56,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:22:56,281 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:22:56,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:22:56,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:22:56,328 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:22:56,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:22:56,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:22:56,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:22:56,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:22:56,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:22:56,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:22:56,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:22:56,492 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-19 08:22:56,493 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:22:56,649 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:22:56,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:22:56,707 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-19 08:22:56,707 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:22:56,787 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-19 08:22:56,787 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:22:56,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:22:56,847 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-19 08:22:56,848 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:22:56,918 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-19 08:22:56,918 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:22:56,934 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:22:56,966 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 08:22:56,966 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 28 [2022-11-19 08:22:57,027 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-19 08:22:57,027 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:22:57,054 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:22:57,508 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2906#(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) (<= 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) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem16#1| (+ ~N~0 (* ~N~0 ~N~0))) 1 0)) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-19 08:22:57,508 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:22:57,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:22:57,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-11-19 08:22:57,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702219343] [2022-11-19 08:22:57,508 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:22:57,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-19 08:22:57,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:22:57,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-19 08:22:57,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-11-19 08:22:57,510 INFO L87 Difference]: Start difference. First operand 37 states and 43 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) [2022-11-19 08:22:57,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:22:57,864 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2022-11-19 08:22:57,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 08:22:57,865 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 [2022-11-19 08:22:57,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:22:57,866 INFO L225 Difference]: With dead ends: 61 [2022-11-19 08:22:57,866 INFO L226 Difference]: Without dead ends: 48 [2022-11-19 08:22:57,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2022-11-19 08:22:57,867 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 16 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:22:57,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 6 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:22:57,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-19 08:22:57,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 39. [2022-11-19 08:22:57,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 38 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) [2022-11-19 08:22:57,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2022-11-19 08:22:57,901 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 25 [2022-11-19 08:22:57,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:22:57,901 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2022-11-19 08:22:57,901 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) [2022-11-19 08:22:57,901 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2022-11-19 08:22:57,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-19 08:22:57,902 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:22:57,902 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:22:57,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-19 08:22:58,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-19 08:22:58,103 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:22:58,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:22:58,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1877163832, now seen corresponding path program 12 times [2022-11-19 08:22:58,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:22:58,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704632432] [2022-11-19 08:22:58,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:22:58,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:22:58,123 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:22:58,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2033202557] [2022-11-19 08:22:58,124 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:22:58,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:22:58,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:22:58,125 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:22:58,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-19 08:22:58,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:22:58,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:22:58,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 08:22:58,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:22:58,387 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 08:22:58,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:22:58,510 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 08:22:58,510 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:22:58,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704632432] [2022-11-19 08:22:58,511 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:22:58,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033202557] [2022-11-19 08:22:58,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033202557] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:22:58,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1737179229] [2022-11-19 08:22:58,513 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:22:58,513 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:22:58,513 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:22:58,513 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:22:58,514 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:22:58,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:22:58,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:22:58,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:22:58,626 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-19 08:22:58,626 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:22:58,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:22:58,640 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:22:58,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:22:58,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:22:58,660 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:22:58,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:22:58,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:22:58,694 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:22:58,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:22:58,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:22:58,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:22:58,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:22:58,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:22:58,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:22:58,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:22:58,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:22:58,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:22:58,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:22:58,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:22:58,875 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-11-19 08:22:58,876 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:22:58,968 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:22:58,982 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:22:59,014 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-19 08:22:59,014 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:22:59,082 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-19 08:22:59,082 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:22:59,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:22:59,147 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-19 08:22:59,147 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:22:59,244 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-19 08:22:59,244 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:22:59,273 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:22:59,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:22:59,321 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 08:22:59,322 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 28 [2022-11-19 08:22:59,410 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-19 08:22:59,410 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:22:59,440 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:23:00,398 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3273#(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) (<= 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) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem16#1| (+ ~N~0 (* ~N~0 ~N~0))) 1 0)) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-19 08:23:00,399 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:23:00,399 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:23:00,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-11-19 08:23:00,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908524614] [2022-11-19 08:23:00,399 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:23:00,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-19 08:23:00,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:23:00,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-19 08:23:00,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-11-19 08:23:00,400 INFO L87 Difference]: Start difference. First operand 39 states and 45 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) [2022-11-19 08:23:00,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:23:00,696 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2022-11-19 08:23:00,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 08:23:00,696 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 [2022-11-19 08:23:00,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:23:00,697 INFO L225 Difference]: With dead ends: 60 [2022-11-19 08:23:00,697 INFO L226 Difference]: Without dead ends: 29 [2022-11-19 08:23:00,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 22 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2022-11-19 08:23:00,698 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 7 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:23:00,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 12 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:23:00,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-19 08:23:00,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-19 08:23:00,723 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) [2022-11-19 08:23:00,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2022-11-19 08:23:00,723 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 25 [2022-11-19 08:23:00,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:23:00,724 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2022-11-19 08:23:00,724 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) [2022-11-19 08:23:00,724 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2022-11-19 08:23:00,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-19 08:23:00,725 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:23:00,725 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:23:00,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-19 08:23:00,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:23:00,931 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:23:00,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:23:00,931 INFO L85 PathProgramCache]: Analyzing trace with hash 616366677, now seen corresponding path program 13 times [2022-11-19 08:23:00,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:23:00,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274186424] [2022-11-19 08:23:00,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:23:00,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:23:00,963 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:23:00,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1746155256] [2022-11-19 08:23:00,965 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 08:23:00,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:23:00,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:23:00,966 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:23:00,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e178d3-ef96-44b3-b66b-8222a9056605/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-19 08:23:01,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:01,137 WARN L261 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 143 conjunts are in the unsatisfiable core [2022-11-19 08:23:01,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:23:01,164 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:23:01,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:01,191 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:23:01,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:01,224 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:23:01,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:01,261 INFO L350 Elim1Store]: Elim1 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 48 treesize of output 53 [2022-11-19 08:23:01,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:01,325 INFO L350 Elim1Store]: Elim1 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 60 treesize of output 68 [2022-11-19 08:23:01,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:01,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:01,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:01,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:01,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:01,394 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:23:01,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:01,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:01,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:23:01,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:01,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:01,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:01,569 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:23:01,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:01,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:01,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:01,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:01,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:01,654 INFO L350 Elim1Store]: Elim1 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 74 treesize of output 71 [2022-11-19 08:23:01,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:01,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:01,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:01,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:01,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:01,750 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:23:01,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:01,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:01,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:01,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:01,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:01,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:01,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:01,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:01,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:01,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:23:01,858 INFO L350 Elim1Store]: Elim1 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 79 [2022-11-19 08:23:01,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:01,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:01,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:01,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:01,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:01,983 INFO L350 Elim1Store]: Elim1 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 109 treesize of output 78 [2022-11-19 08:23:02,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:02,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:02,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:02,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:02,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:02,195 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:23:02,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:02,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:02,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:02,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:02,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:02,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:02,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:02,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:02,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:23:02,301 INFO L350 Elim1Store]: Elim1 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 94 treesize of output 78 [2022-11-19 08:23:02,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:02,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:02,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:02,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:02,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:02,417 INFO L350 Elim1Store]: Elim1 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 76 treesize of output 71 [2022-11-19 08:23:02,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:02,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:02,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:02,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:02,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:02,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:02,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:02,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:02,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:02,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:23:02,585 INFO L350 Elim1Store]: Elim1 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 90 treesize of output 76 [2022-11-19 08:23:02,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:02,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:02,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:02,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:02,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:02,712 INFO L350 Elim1Store]: Elim1 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 90 treesize of output 73 [2022-11-19 08:23:02,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:02,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:02,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:02,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:02,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:02,839 INFO L350 Elim1Store]: Elim1 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 71 [2022-11-19 08:23:02,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:02,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:02,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:02,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:02,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:02,981 INFO L350 Elim1Store]: Elim1 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 84 treesize of output 71 [2022-11-19 08:23:03,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:03,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:03,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:03,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:03,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:03,126 INFO L350 Elim1Store]: Elim1 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 74 treesize of output 71 [2022-11-19 08:23:03,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:03,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:03,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:03,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:03,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:03,269 INFO L350 Elim1Store]: Elim1 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 74 treesize of output 71 [2022-11-19 08:23:03,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:03,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:03,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:03,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:03,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:03,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:03,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:03,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:03,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:03,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:23:03,446 INFO L350 Elim1Store]: Elim1 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 74 [2022-11-19 08:23:03,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:03,581 INFO L350 Elim1Store]: Elim1 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 70 treesize of output 65 [2022-11-19 08:23:03,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:23:03,724 INFO L350 Elim1Store]: Elim1 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 92 treesize of output 48 [2022-11-19 08:23:03,804 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:23:03,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:25:58,169 WARN L837 $PredicateComparison]: unable to prove that (forall ((~N~0 Int)) (or (= (let ((.cse6 (+ 32 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse7 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 24)) (.cse8 (+ 16 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse9 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse0 (let ((.cse24 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1))) (let ((.cse22 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse24))) (let ((.cse23 (select .cse22 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse16 (select .cse23 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse21 (select .cse24 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse18 (select (select (store .cse22 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse23 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse16 .cse21))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse9))) (let ((.cse17 (select (select (store .cse22 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse23 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse16 .cse18 .cse21))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse8))) (let ((.cse20 (select (select (store .cse22 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse23 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse16 .cse17 .cse18 .cse21))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse7))) (let ((.cse19 (select (select (store .cse22 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse23 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse16 .cse17 .cse18 .cse20 .cse21))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse6))) (let ((.cse10 (store .cse22 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse23 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse16 .cse17 .cse18 .cse19 .cse20 .cse21))))) (store .cse10 |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse12 (select .cse10 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse11 (let ((.cse13 (let ((.cse14 (let ((.cse15 (store .cse12 |c_ULTIMATE.start_main_~a~0#1.offset| (+ .cse16 (select .cse12 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse17 .cse18 .cse19 .cse20 .cse21)))) (store .cse15 .cse9 (+ (select (select (store .cse10 |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 .cse12 .cse9)))))) (store .cse14 .cse8 (+ (select (select (store .cse10 |c_ULTIMATE.start_main_~a~0#1.base| .cse14) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse12 .cse8)))))) (store .cse13 .cse7 (+ (select .cse12 .cse7) (select (select (store .cse10 |c_ULTIMATE.start_main_~a~0#1.base| .cse13) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))))) (store .cse11 .cse6 (+ (select (select (store .cse10 |c_ULTIMATE.start_main_~a~0#1.base| .cse11) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse12 .cse6))))))))))))))))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse3 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| 0)) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse5 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse3)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse9))) (let ((.cse2 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse3 .cse5))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse8))) (let ((.cse4 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse2 .cse3 .cse5))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse7))) (+ (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse2 .cse3 .cse4 .cse5))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse6) .cse2 .cse3 .cse4 .cse5)))))))) (+ ~N~0 (* ~N~0 ~N~0))) (< (+ |c_ULTIMATE.start_main_~i~0#1| 1) ~N~0) (not (< |c_ULTIMATE.start_main_~i~0#1| ~N~0)))) is different from false