/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/array-fpi/eqn3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 03:00:51,221 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 03:00:51,222 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 03:00:51,251 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 03:00:51,251 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 03:00:51,252 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 03:00:51,254 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 03:00:51,255 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 03:00:51,256 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 03:00:51,265 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 03:00:51,266 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 03:00:51,268 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 03:00:51,269 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 03:00:51,277 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 03:00:51,278 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 03:00:51,278 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 03:00:51,279 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 03:00:51,279 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 03:00:51,280 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 03:00:51,281 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 03:00:51,281 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 03:00:51,283 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 03:00:51,284 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 03:00:51,284 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 03:00:51,286 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 03:00:51,286 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 03:00:51,287 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 03:00:51,287 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 03:00:51,287 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 03:00:51,288 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 03:00:51,288 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 03:00:51,288 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 03:00:51,289 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 03:00:51,289 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 03:00:51,290 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 03:00:51,290 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 03:00:51,290 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 03:00:51,290 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 03:00:51,290 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 03:00:51,291 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 03:00:51,291 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 03:00:51,294 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 03:00:51,315 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 03:00:51,315 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 03:00:51,316 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 03:00:51,316 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 03:00:51,316 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 03:00:51,316 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 03:00:51,316 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 03:00:51,316 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 03:00:51,316 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 03:00:51,317 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 03:00:51,317 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 03:00:51,317 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 03:00:51,317 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 03:00:51,317 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 03:00:51,317 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 03:00:51,317 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 03:00:51,317 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 03:00:51,317 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 03:00:51,318 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 03:00:51,318 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 03:00:51,318 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 03:00:51,318 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 03:00:51,318 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 03:00:51,318 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 03:00:51,318 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 03:00:51,318 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 03:00:51,318 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 03:00:51,318 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 03:00:51,318 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 03:00:51,319 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 03:00:51,319 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 03:00:51,319 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 03:00:51,319 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:00:51,319 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 03:00:51,319 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 03:00:51,319 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 03:00:51,319 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 03:00:51,319 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 03:00:51,319 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 03:00:51,319 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 03:00:51,320 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 03:00:51,320 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 03:00:51,520 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 03:00:51,540 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 03:00:51,542 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 03:00:51,543 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 03:00:51,544 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 03:00:51,545 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/eqn3.c [2023-04-01 03:00:52,632 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 03:00:52,851 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 03:00:52,852 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn3.c [2023-04-01 03:00:52,857 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/923c79888/ea302ce773524cb98011397d9c5b52d3/FLAGdfeeb9e95 [2023-04-01 03:00:52,871 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/923c79888/ea302ce773524cb98011397d9c5b52d3 [2023-04-01 03:00:52,874 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 03:00:52,876 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 03:00:52,876 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 03:00:52,876 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 03:00:52,879 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 03:00:52,879 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:00:52" (1/1) ... [2023-04-01 03:00:52,881 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@de116f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:00:52, skipping insertion in model container [2023-04-01 03:00:52,881 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:00:52" (1/1) ... [2023-04-01 03:00:52,887 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 03:00:52,907 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 03:00:53,006 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn3.c[587,600] [2023-04-01 03:00:53,027 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:00:53,034 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 03:00:53,042 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn3.c[587,600] [2023-04-01 03:00:53,047 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:00:53,057 INFO L208 MainTranslator]: Completed translation [2023-04-01 03:00:53,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:00:53 WrapperNode [2023-04-01 03:00:53,057 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 03:00:53,058 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 03:00:53,058 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 03:00:53,058 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 03:00:53,066 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:00:53" (1/1) ... [2023-04-01 03:00:53,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:00:53" (1/1) ... [2023-04-01 03:00:53,070 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:00:53" (1/1) ... [2023-04-01 03:00:53,070 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:00:53" (1/1) ... [2023-04-01 03:00:53,078 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:00:53" (1/1) ... [2023-04-01 03:00:53,081 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:00:53" (1/1) ... [2023-04-01 03:00:53,082 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:00:53" (1/1) ... [2023-04-01 03:00:53,082 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:00:53" (1/1) ... [2023-04-01 03:00:53,084 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 03:00:53,084 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 03:00:53,084 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 03:00:53,084 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 03:00:53,085 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:00:53" (1/1) ... [2023-04-01 03:00:53,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:00:53,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:00:53,106 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 03:00:53,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 03:00:53,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 03:00:53,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 03:00:53,146 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 03:00:53,148 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 03:00:53,148 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 03:00:53,148 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 03:00:53,148 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 03:00:53,148 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 03:00:53,148 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 03:00:53,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 03:00:53,148 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 03:00:53,148 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 03:00:53,149 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 03:00:53,149 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 03:00:53,149 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 03:00:53,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 03:00:53,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 03:00:53,149 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 03:00:53,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 03:00:53,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 03:00:53,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 03:00:53,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 03:00:53,200 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 03:00:53,201 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 03:00:53,326 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 03:00:53,373 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 03:00:53,374 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 03:00:53,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:00:53 BoogieIcfgContainer [2023-04-01 03:00:53,375 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 03:00:53,377 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 03:00:53,377 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 03:00:53,379 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 03:00:53,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 03:00:52" (1/3) ... [2023-04-01 03:00:53,380 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62f91d70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:00:53, skipping insertion in model container [2023-04-01 03:00:53,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:00:53" (2/3) ... [2023-04-01 03:00:53,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62f91d70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:00:53, skipping insertion in model container [2023-04-01 03:00:53,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:00:53" (3/3) ... [2023-04-01 03:00:53,382 INFO L112 eAbstractionObserver]: Analyzing ICFG eqn3.c [2023-04-01 03:00:53,409 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 03:00:53,410 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 03:00:53,451 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 03:00:53,456 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;@ec574ea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 03:00:53,456 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 03:00:53,463 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 03:00:53,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-01 03:00:53,469 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:00:53,470 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:00:53,471 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:00:53,478 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:00:53,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1001205354, now seen corresponding path program 1 times [2023-04-01 03:00:53,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:00:53,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938799955] [2023-04-01 03:00:53,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:00:53,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:00:53,606 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:00:53,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [447700844] [2023-04-01 03:00:53,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:00:53,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:00:53,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:00:53,612 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:00:53,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 03:00:53,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:00:53,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 19 conjunts are in the unsatisfiable core [2023-04-01 03:00:53,745 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:00:53,877 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-04-01 03:00:53,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-04-01 03:00:53,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 03:00:53,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 03:00:54,026 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 5 treesize of output 3 [2023-04-01 03:00:54,056 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 38 treesize of output 11 [2023-04-01 03:00:54,060 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 5 treesize of output 3 [2023-04-01 03:00:54,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:00:54,134 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 03:00:54,135 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:00:54,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938799955] [2023-04-01 03:00:54,135 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:00:54,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447700844] [2023-04-01 03:00:54,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447700844] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:00:54,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:00:54,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-01 03:00:54,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329211946] [2023-04-01 03:00:54,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:00:54,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 03:00:54,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:00:54,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 03:00:54,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-04-01 03:00:54,176 INFO L87 Difference]: Start difference. First operand has 25 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:00:54,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:00:54,304 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2023-04-01 03:00:54,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 03:00:54,306 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2023-04-01 03:00:54,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:00:54,311 INFO L225 Difference]: With dead ends: 54 [2023-04-01 03:00:54,311 INFO L226 Difference]: Without dead ends: 33 [2023-04-01 03:00:54,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-04-01 03:00:54,316 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 16 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 03:00:54,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 96 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 03:00:54,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-01 03:00:54,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2023-04-01 03:00:54,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 03:00:54,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2023-04-01 03:00:54,344 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 17 [2023-04-01 03:00:54,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:00:54,344 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2023-04-01 03:00:54,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:00:54,345 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2023-04-01 03:00:54,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 03:00:54,345 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:00:54,345 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:00:54,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 03:00:54,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-01 03:00:54,551 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:00:54,551 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:00:54,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1191020082, now seen corresponding path program 1 times [2023-04-01 03:00:54,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:00:54,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375804654] [2023-04-01 03:00:54,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:00:54,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:00:54,599 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:00:54,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1099592672] [2023-04-01 03:00:54,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:00:54,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:00:54,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:00:54,604 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:00:54,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 03:00:54,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:00:54,672 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 03:00:54,674 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:00:54,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:00:54,700 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:00:54,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:00:54,734 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:00:54,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375804654] [2023-04-01 03:00:54,734 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:00:54,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099592672] [2023-04-01 03:00:54,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099592672] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:00:54,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1220141090] [2023-04-01 03:00:54,751 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 03:00:54,751 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:00:54,753 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:00:54,757 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:00:54,757 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:00:54,851 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:00:55,094 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2023-04-01 03:00:55,110 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:00:55,115 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:00:55,123 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:00:55,707 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '319#(and (exists ((v_main_~b~0.base_BEFORE_CALL_1 Int)) (and (not (= (select (select |#memory_int| v_main_~b~0.base_BEFORE_CALL_1) 0) 1)) (<= (+ v_main_~b~0.base_BEFORE_CALL_1 1) |#StackHeapBarrier|))) (<= 2 (+ ~N~0 |#StackHeapBarrier|)) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~N~0 1) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:00:55,707 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:00:55,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:00:55,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2023-04-01 03:00:55,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584689312] [2023-04-01 03:00:55,708 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:00:55,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 03:00:55,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:00:55,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 03:00:55,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2023-04-01 03:00:55,710 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:00:55,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:00:55,797 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2023-04-01 03:00:55,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 03:00:55,797 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2023-04-01 03:00:55,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:00:55,799 INFO L225 Difference]: With dead ends: 51 [2023-04-01 03:00:55,799 INFO L226 Difference]: Without dead ends: 42 [2023-04-01 03:00:55,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2023-04-01 03:00:55,800 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 10 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 03:00:55,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 71 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 03:00:55,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-04-01 03:00:55,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 30. [2023-04-01 03:00:55,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 03:00:55,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2023-04-01 03:00:55,805 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 18 [2023-04-01 03:00:55,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:00:55,806 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2023-04-01 03:00:55,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:00:55,806 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2023-04-01 03:00:55,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 03:00:55,806 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:00:55,806 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:00:55,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 03:00:56,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-04-01 03:00:56,012 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:00:56,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:00:56,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1062231974, now seen corresponding path program 1 times [2023-04-01 03:00:56,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:00:56,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316601058] [2023-04-01 03:00:56,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:00:56,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:00:56,049 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:00:56,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2069496735] [2023-04-01 03:00:56,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:00:56,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:00:56,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:00:56,056 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:00:56,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 03:00:56,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:00:56,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 03:00:56,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:00:56,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:00:56,123 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 03:00:56,123 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:00:56,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316601058] [2023-04-01 03:00:56,123 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:00:56,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069496735] [2023-04-01 03:00:56,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069496735] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:00:56,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:00:56,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 03:00:56,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883693156] [2023-04-01 03:00:56,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:00:56,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 03:00:56,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:00:56,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 03:00:56,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 03:00:56,125 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:00:56,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:00:56,156 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2023-04-01 03:00:56,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 03:00:56,157 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2023-04-01 03:00:56,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:00:56,157 INFO L225 Difference]: With dead ends: 43 [2023-04-01 03:00:56,157 INFO L226 Difference]: Without dead ends: 33 [2023-04-01 03:00:56,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:00:56,158 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 03:00:56,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 38 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 03:00:56,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-01 03:00:56,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2023-04-01 03:00:56,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 03:00:56,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2023-04-01 03:00:56,163 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 18 [2023-04-01 03:00:56,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:00:56,163 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2023-04-01 03:00:56,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:00:56,163 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2023-04-01 03:00:56,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-01 03:00:56,164 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:00:56,164 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:00:56,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 03:00:56,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:00:56,369 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:00:56,369 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:00:56,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1643446050, now seen corresponding path program 1 times [2023-04-01 03:00:56,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:00:56,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635674709] [2023-04-01 03:00:56,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:00:56,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:00:56,386 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:00:56,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1300994005] [2023-04-01 03:00:56,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:00:56,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:00:56,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:00:56,388 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:00:56,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 03:00:56,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:00:56,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 30 conjunts are in the unsatisfiable core [2023-04-01 03:00:56,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:00:56,493 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 [2023-04-01 03:00:56,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 03:00:56,500 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 14 treesize of output 14 [2023-04-01 03:00:56,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 03:00:56,518 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 14 treesize of output 16 [2023-04-01 03:00:56,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-04-01 03:00:56,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:00:56,570 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:00:56,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:00:56,777 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:00:56,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635674709] [2023-04-01 03:00:56,778 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:00:56,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300994005] [2023-04-01 03:00:56,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300994005] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:00:56,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [446708069] [2023-04-01 03:00:56,779 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 03:00:56,780 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:00:56,780 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:00:56,780 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:00:56,780 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:00:56,826 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:00:57,008 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 35 for LOIs [2023-04-01 03:00:57,020 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:00:57,023 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:00:57,033 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:00:57,591 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '760#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((v_main_~b~0.base_BEFORE_CALL_2 Int)) (and (<= (+ v_main_~b~0.base_BEFORE_CALL_2 1) |#StackHeapBarrier|) (not (= (select (select |#memory_int| v_main_~b~0.base_BEFORE_CALL_2) 0) 1)))) (= |#NULL.base| 0))' at error location [2023-04-01 03:00:57,591 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:00:57,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:00:57,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2023-04-01 03:00:57,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305055949] [2023-04-01 03:00:57,592 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:00:57,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 03:00:57,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:00:57,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 03:00:57,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=790, Unknown=0, NotChecked=0, Total=870 [2023-04-01 03:00:57,593 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 15 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 03:00:57,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:00:57,816 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2023-04-01 03:00:57,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 03:00:57,816 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 19 [2023-04-01 03:00:57,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:00:57,817 INFO L225 Difference]: With dead ends: 51 [2023-04-01 03:00:57,817 INFO L226 Difference]: Without dead ends: 49 [2023-04-01 03:00:57,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=113, Invalid=1077, Unknown=0, NotChecked=0, Total=1190 [2023-04-01 03:00:57,818 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 31 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 03:00:57,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 103 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 03:00:57,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-04-01 03:00:57,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2023-04-01 03:00:57,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 03:00:57,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2023-04-01 03:00:57,824 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 19 [2023-04-01 03:00:57,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:00:57,824 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2023-04-01 03:00:57,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 03:00:57,824 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2023-04-01 03:00:57,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 03:00:57,825 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:00:57,825 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:00:57,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 03:00:58,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:00:58,033 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:00:58,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:00:58,033 INFO L85 PathProgramCache]: Analyzing trace with hash -230270114, now seen corresponding path program 2 times [2023-04-01 03:00:58,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:00:58,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600735992] [2023-04-01 03:00:58,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:00:58,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:00:58,050 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:00:58,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1459128498] [2023-04-01 03:00:58,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 03:00:58,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:00:58,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:00:58,054 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:00:58,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 03:00:58,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 03:00:58,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:00:58,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 03:00:58,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:00:58,194 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 03:00:58,195 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:00:58,221 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 03:00:58,221 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:00:58,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600735992] [2023-04-01 03:00:58,222 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:00:58,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459128498] [2023-04-01 03:00:58,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459128498] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:00:58,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [852133444] [2023-04-01 03:00:58,226 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 03:00:58,226 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:00:58,226 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:00:58,226 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:00:58,227 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:00:58,275 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:00:58,409 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 35 for LOIs [2023-04-01 03:00:58,419 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:00:58,421 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:00:58,427 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:00:58,840 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1047#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((v_main_~b~0.base_BEFORE_CALL_3 Int)) (and (<= (+ v_main_~b~0.base_BEFORE_CALL_3 1) |#StackHeapBarrier|) (not (= (select (select |#memory_int| v_main_~b~0.base_BEFORE_CALL_3) 0) 1)))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:00:58,841 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:00:58,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:00:58,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-04-01 03:00:58,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117901385] [2023-04-01 03:00:58,841 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:00:58,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 03:00:58,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:00:58,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 03:00:58,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2023-04-01 03:00:58,842 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:00:58,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:00:58,950 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2023-04-01 03:00:58,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 03:00:58,951 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2023-04-01 03:00:58,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:00:58,951 INFO L225 Difference]: With dead ends: 62 [2023-04-01 03:00:58,951 INFO L226 Difference]: Without dead ends: 40 [2023-04-01 03:00:58,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2023-04-01 03:00:58,952 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 4 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 03:00:58,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 70 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 03:00:58,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-04-01 03:00:58,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2023-04-01 03:00:58,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.25) internal successors, (30), 25 states have internal predecessors, (30), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 03:00:58,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2023-04-01 03:00:58,957 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 21 [2023-04-01 03:00:58,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:00:58,958 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2023-04-01 03:00:58,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:00:58,958 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2023-04-01 03:00:58,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 03:00:58,958 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:00:58,958 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:00:58,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 03:00:59,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:00:59,164 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:00:59,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:00:59,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1433039066, now seen corresponding path program 3 times [2023-04-01 03:00:59,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:00:59,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598271348] [2023-04-01 03:00:59,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:00:59,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:00:59,187 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:00:59,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [226282535] [2023-04-01 03:00:59,187 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 03:00:59,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:00:59,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:00:59,191 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:00:59,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 03:00:59,242 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 03:00:59,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:00:59,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 03:00:59,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:00:59,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:00:59,278 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:00:59,312 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:00:59,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:00:59,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598271348] [2023-04-01 03:00:59,313 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:00:59,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226282535] [2023-04-01 03:00:59,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226282535] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:00:59,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [421142508] [2023-04-01 03:00:59,314 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 03:00:59,315 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:00:59,315 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:00:59,315 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:00:59,315 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:00:59,336 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:00:59,468 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 35 for LOIs [2023-04-01 03:00:59,476 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:00:59,480 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:00:59,484 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:00:59,956 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1366#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (exists ((v_main_~b~0.base_BEFORE_CALL_4 Int)) (and (<= (+ v_main_~b~0.base_BEFORE_CALL_4 1) |#StackHeapBarrier|) (not (= (select (select |#memory_int| v_main_~b~0.base_BEFORE_CALL_4) 0) 1)))) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:00:59,956 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:00:59,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:00:59,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2023-04-01 03:00:59,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292610396] [2023-04-01 03:00:59,956 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:00:59,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 03:00:59,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:00:59,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 03:00:59,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2023-04-01 03:00:59,957 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:01:00,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:01:00,120 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2023-04-01 03:01:00,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 03:01:00,121 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2023-04-01 03:01:00,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:01:00,121 INFO L225 Difference]: With dead ends: 64 [2023-04-01 03:01:00,121 INFO L226 Difference]: Without dead ends: 52 [2023-04-01 03:01:00,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2023-04-01 03:01:00,122 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 9 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 03:01:00,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 72 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 03:01:00,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-04-01 03:01:00,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 43. [2023-04-01 03:01:00,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 33 states have internal predecessors, (39), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 03:01:00,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2023-04-01 03:01:00,129 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 22 [2023-04-01 03:01:00,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:01:00,129 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2023-04-01 03:01:00,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:01:00,129 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2023-04-01 03:01:00,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 03:01:00,130 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:01:00,130 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:01:00,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 03:01:00,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:01:00,335 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:01:00,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:01:00,335 INFO L85 PathProgramCache]: Analyzing trace with hash -64170914, now seen corresponding path program 4 times [2023-04-01 03:01:00,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:01:00,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549699531] [2023-04-01 03:01:00,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:01:00,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:01:00,351 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:01:00,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [502259310] [2023-04-01 03:01:00,351 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 03:01:00,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:01:00,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:01:00,352 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:01:00,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 03:01:00,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:01:00,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 48 conjunts are in the unsatisfiable core [2023-04-01 03:01:00,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:01:00,670 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 [2023-04-01 03:01:00,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 03:01:00,676 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 14 treesize of output 14 [2023-04-01 03:01:00,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 03:01:00,691 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 14 treesize of output 16 [2023-04-01 03:01:00,705 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 14 treesize of output 16 [2023-04-01 03:01:00,717 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 14 treesize of output 16 [2023-04-01 03:01:00,740 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 [2023-04-01 03:01:00,753 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 [2023-04-01 03:01:00,766 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 [2023-04-01 03:01:00,802 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:01:00,802 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:01:01,173 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 03:01:01,173 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:01:01,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549699531] [2023-04-01 03:01:01,173 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:01:01,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502259310] [2023-04-01 03:01:01,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502259310] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:01:01,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1569851525] [2023-04-01 03:01:01,175 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 03:01:01,175 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:01:01,175 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:01:01,175 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:01:01,175 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:01:01,197 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:01:01,296 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 35 for LOIs [2023-04-01 03:01:01,304 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:01:01,307 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:01:01,311 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:01:01,852 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1731#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((v_main_~b~0.base_BEFORE_CALL_5 Int)) (and (<= (+ v_main_~b~0.base_BEFORE_CALL_5 1) |#StackHeapBarrier|) (not (= (select (select |#memory_int| v_main_~b~0.base_BEFORE_CALL_5) 0) 1)))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:01:01,853 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:01:01,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:01:01,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2023-04-01 03:01:01,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493360310] [2023-04-01 03:01:01,855 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:01:01,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-01 03:01:01,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:01:01,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-01 03:01:01,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1264, Unknown=7, NotChecked=0, Total=1406 [2023-04-01 03:01:01,857 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 23 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 03:01:02,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:01:02,539 INFO L93 Difference]: Finished difference Result 80 states and 102 transitions. [2023-04-01 03:01:02,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 03:01:02,539 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2023-04-01 03:01:02,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:01:02,542 INFO L225 Difference]: With dead ends: 80 [2023-04-01 03:01:02,542 INFO L226 Difference]: Without dead ends: 78 [2023-04-01 03:01:02,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=206, Invalid=1766, Unknown=8, NotChecked=0, Total=1980 [2023-04-01 03:01:02,544 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 38 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 03:01:02,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 172 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 03:01:02,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-04-01 03:01:02,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 53. [2023-04-01 03:01:02,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 42 states have internal predecessors, (51), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 03:01:02,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2023-04-01 03:01:02,565 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 23 [2023-04-01 03:01:02,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:01:02,565 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2023-04-01 03:01:02,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 03:01:02,566 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2023-04-01 03:01:02,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-01 03:01:02,570 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:01:02,570 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:01:02,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 03:01:02,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:01:02,777 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:01:02,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:01:02,777 INFO L85 PathProgramCache]: Analyzing trace with hash -409251036, now seen corresponding path program 1 times [2023-04-01 03:01:02,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:01:02,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275637927] [2023-04-01 03:01:02,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:01:02,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:01:02,787 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:01:02,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1412586597] [2023-04-01 03:01:02,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:01:02,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:01:02,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:01:02,788 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:01:02,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 03:01:02,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:01:02,881 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 42 conjunts are in the unsatisfiable core [2023-04-01 03:01:02,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:01:02,895 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 [2023-04-01 03:01:02,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 03:01:02,900 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2023-04-01 03:01:02,903 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 20 treesize of output 20 [2023-04-01 03:01:02,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 03:01:02,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 03:01:02,928 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-04-01 03:01:02,929 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 1 case distinctions, treesize of input 26 treesize of output 28 [2023-04-01 03:01:02,951 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-04-01 03:01:02,952 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 1 case distinctions, treesize of input 26 treesize of output 28 [2023-04-01 03:01:03,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:01:03,082 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:01:03,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:01:03,458 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:01:03,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275637927] [2023-04-01 03:01:03,458 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:01:03,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412586597] [2023-04-01 03:01:03,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412586597] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:01:03,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1035342125] [2023-04-01 03:01:03,460 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 03:01:03,460 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:01:03,460 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:01:03,460 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:01:03,460 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:01:03,482 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:01:03,732 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 64 for LOIs [2023-04-01 03:01:03,777 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:01:03,781 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:01:03,786 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:01:08,700 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2156#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((v_main_~b~0.base_BEFORE_CALL_12 Int) (v_main_~i~0_BEFORE_CALL_16 Int) (|v_main_#t~mem13_BEFORE_CALL_14| Int)) (and (<= (+ v_main_~b~0.base_BEFORE_CALL_12 1) |#StackHeapBarrier|) (<= 1 (+ v_main_~i~0_BEFORE_CALL_16 ~N~0)) (or (and (< 2147483647 (mod v_main_~i~0_BEFORE_CALL_16 4294967296)) (= (select (select |#memory_int| v_main_~b~0.base_BEFORE_CALL_12) (+ (* 8 (mod v_main_~i~0_BEFORE_CALL_16 4294967296)) (- 34359738368))) |v_main_#t~mem13_BEFORE_CALL_14|)) (and (= (select (select |#memory_int| v_main_~b~0.base_BEFORE_CALL_12) (* 8 (mod v_main_~i~0_BEFORE_CALL_16 4294967296))) |v_main_#t~mem13_BEFORE_CALL_14|) (<= (mod v_main_~i~0_BEFORE_CALL_16 4294967296) 2147483647))) (<= 0 v_main_~i~0_BEFORE_CALL_16) (not (= |v_main_#t~mem13_BEFORE_CALL_14| (+ (* 3 (* v_main_~i~0_BEFORE_CALL_16 v_main_~i~0_BEFORE_CALL_16)) (* v_main_~i~0_BEFORE_CALL_16 3) 1))) (< v_main_~i~0_BEFORE_CALL_16 ~N~0) (<= ~N~0 (+ 2147483647 v_main_~i~0_BEFORE_CALL_16)) (<= 1 (+ v_main_~i~0_BEFORE_CALL_16 |#StackHeapBarrier|)))) (= |#NULL.base| 0))' at error location [2023-04-01 03:01:08,701 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:01:08,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:01:08,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2023-04-01 03:01:08,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991657012] [2023-04-01 03:01:08,701 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:01:08,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-01 03:01:08,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:01:08,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-01 03:01:08,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1288, Unknown=2, NotChecked=0, Total=1406 [2023-04-01 03:01:08,702 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand has 21 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 19 states have internal predecessors, (32), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 03:01:09,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:01:09,640 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2023-04-01 03:01:09,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-01 03:01:09,640 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 19 states have internal predecessors, (32), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 26 [2023-04-01 03:01:09,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:01:09,643 INFO L225 Difference]: With dead ends: 86 [2023-04-01 03:01:09,643 INFO L226 Difference]: Without dead ends: 77 [2023-04-01 03:01:09,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=218, Invalid=2036, Unknown=2, NotChecked=0, Total=2256 [2023-04-01 03:01:09,645 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 37 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 03:01:09,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 196 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 03:01:09,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-04-01 03:01:09,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 58. [2023-04-01 03:01:09,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 45 states have internal predecessors, (52), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 03:01:09,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2023-04-01 03:01:09,661 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 26 [2023-04-01 03:01:09,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:01:09,661 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2023-04-01 03:01:09,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 19 states have internal predecessors, (32), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 03:01:09,661 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2023-04-01 03:01:09,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-01 03:01:09,661 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:01:09,662 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:01:09,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 03:01:09,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-04-01 03:01:09,863 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:01:09,864 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:01:09,864 INFO L85 PathProgramCache]: Analyzing trace with hash 790702430, now seen corresponding path program 5 times [2023-04-01 03:01:09,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:01:09,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287249676] [2023-04-01 03:01:09,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:01:09,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:01:09,911 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:01:09,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [738937392] [2023-04-01 03:01:09,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 03:01:09,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:01:09,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:01:09,913 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:01:09,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 03:01:10,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-04-01 03:01:10,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:01:10,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 03:01:10,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:01:10,967 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 03:01:10,967 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:01:11,015 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 03:01:11,015 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:01:11,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287249676] [2023-04-01 03:01:11,015 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:01:11,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738937392] [2023-04-01 03:01:11,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738937392] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:01:11,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1093885126] [2023-04-01 03:01:11,016 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 03:01:11,016 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:01:11,017 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:01:11,017 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:01:11,017 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:01:11,055 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:01:11,167 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 35 for LOIs [2023-04-01 03:01:11,174 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:01:11,177 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:01:11,181 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:01:11,704 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2599#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((v_main_~b~0.base_BEFORE_CALL_15 Int)) (and (<= (+ v_main_~b~0.base_BEFORE_CALL_15 1) |#StackHeapBarrier|) (not (= (select (select |#memory_int| v_main_~b~0.base_BEFORE_CALL_15) 0) 1)))) (= |#NULL.base| 0))' at error location [2023-04-01 03:01:11,705 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:01:11,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:01:11,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2023-04-01 03:01:11,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870697561] [2023-04-01 03:01:11,705 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:01:11,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 03:01:11,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:01:11,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 03:01:11,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2023-04-01 03:01:11,706 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:01:12,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:01:12,041 INFO L93 Difference]: Finished difference Result 104 states and 129 transitions. [2023-04-01 03:01:12,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-01 03:01:12,042 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2023-04-01 03:01:12,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:01:12,042 INFO L225 Difference]: With dead ends: 104 [2023-04-01 03:01:12,042 INFO L226 Difference]: Without dead ends: 83 [2023-04-01 03:01:12,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=235, Invalid=1487, Unknown=0, NotChecked=0, Total=1722 [2023-04-01 03:01:12,043 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 03:01:12,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 93 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 03:01:12,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-04-01 03:01:12,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2023-04-01 03:01:12,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 50 states have (on average 1.26) internal successors, (63), 54 states have internal predecessors, (63), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-01 03:01:12,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2023-04-01 03:01:12,055 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 27 [2023-04-01 03:01:12,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:01:12,055 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2023-04-01 03:01:12,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:01:12,055 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2023-04-01 03:01:12,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 03:01:12,056 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:01:12,056 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:01:12,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 03:01:12,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:01:12,263 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:01:12,264 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:01:12,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1747420636, now seen corresponding path program 2 times [2023-04-01 03:01:12,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:01:12,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464662791] [2023-04-01 03:01:12,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:01:12,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:01:12,278 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:01:12,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2055279808] [2023-04-01 03:01:12,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 03:01:12,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:01:12,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:01:12,283 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:01:12,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 03:01:12,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 03:01:12,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:01:12,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 03:01:12,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:01:12,503 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 03:01:12,503 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:01:12,534 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 03:01:12,534 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:01:12,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464662791] [2023-04-01 03:01:12,534 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:01:12,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055279808] [2023-04-01 03:01:12,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055279808] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:01:12,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1078823569] [2023-04-01 03:01:12,535 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 03:01:12,535 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:01:12,536 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:01:12,536 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:01:12,536 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:01:12,557 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:01:12,785 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 64 for LOIs [2023-04-01 03:01:12,817 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:01:12,820 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:01:12,823 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:01:19,534 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3099#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (exists ((v_main_~b~0.base_BEFORE_CALL_20 Int) (v_main_~i~0_BEFORE_CALL_24 Int) (|v_main_#t~mem13_BEFORE_CALL_22| Int)) (and (or (and (< 2147483647 (mod v_main_~i~0_BEFORE_CALL_24 4294967296)) (= |v_main_#t~mem13_BEFORE_CALL_22| (select (select |#memory_int| v_main_~b~0.base_BEFORE_CALL_20) (+ (* (mod v_main_~i~0_BEFORE_CALL_24 4294967296) 8) (- 34359738368))))) (and (<= (mod v_main_~i~0_BEFORE_CALL_24 4294967296) 2147483647) (= (select (select |#memory_int| v_main_~b~0.base_BEFORE_CALL_20) (* (mod v_main_~i~0_BEFORE_CALL_24 4294967296) 8)) |v_main_#t~mem13_BEFORE_CALL_22|))) (< v_main_~i~0_BEFORE_CALL_24 ~N~0) (<= ~N~0 (+ 2147483647 v_main_~i~0_BEFORE_CALL_24)) (<= 1 (+ v_main_~i~0_BEFORE_CALL_24 ~N~0)) (not (= |v_main_#t~mem13_BEFORE_CALL_22| (+ (* v_main_~i~0_BEFORE_CALL_24 3) (* (* v_main_~i~0_BEFORE_CALL_24 v_main_~i~0_BEFORE_CALL_24) 3) 1))) (<= (+ v_main_~b~0.base_BEFORE_CALL_20 1) |#StackHeapBarrier|) (<= 0 v_main_~i~0_BEFORE_CALL_24) (<= 1 (+ v_main_~i~0_BEFORE_CALL_24 |#StackHeapBarrier|)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:01:19,534 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:01:19,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:01:19,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-04-01 03:01:19,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719158201] [2023-04-01 03:01:19,535 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:01:19,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 03:01:19,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:01:19,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 03:01:19,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=571, Unknown=2, NotChecked=0, Total=650 [2023-04-01 03:01:19,536 INFO L87 Difference]: Start difference. First operand 68 states and 83 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 03:01:19,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:01:19,657 INFO L93 Difference]: Finished difference Result 87 states and 102 transitions. [2023-04-01 03:01:19,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 03:01:19,657 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2023-04-01 03:01:19,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:01:19,658 INFO L225 Difference]: With dead ends: 87 [2023-04-01 03:01:19,658 INFO L226 Difference]: Without dead ends: 72 [2023-04-01 03:01:19,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=106, Invalid=762, Unknown=2, NotChecked=0, Total=870 [2023-04-01 03:01:19,659 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 20 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 03:01:19,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 68 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 03:01:19,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-04-01 03:01:19,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2023-04-01 03:01:19,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 52 states have internal predecessors, (60), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 03:01:19,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2023-04-01 03:01:19,670 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 28 [2023-04-01 03:01:19,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:01:19,670 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2023-04-01 03:01:19,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 03:01:19,671 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2023-04-01 03:01:19,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 03:01:19,671 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:01:19,671 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:01:19,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-04-01 03:01:19,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 03:01:19,878 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:01:19,878 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:01:19,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1641834278, now seen corresponding path program 6 times [2023-04-01 03:01:19,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:01:19,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800213535] [2023-04-01 03:01:19,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:01:19,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:01:19,911 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:01:19,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1059195371] [2023-04-01 03:01:19,911 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 03:01:19,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:01:19,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:01:19,912 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:01:19,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 03:01:19,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 03:01:19,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:01:19,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 03:01:19,994 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:01:20,064 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 03:01:20,064 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:01:20,145 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 03:01:20,145 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:01:20,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800213535] [2023-04-01 03:01:20,145 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:01:20,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059195371] [2023-04-01 03:01:20,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059195371] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:01:20,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [488754763] [2023-04-01 03:01:20,146 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 03:01:20,146 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:01:20,147 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:01:20,147 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:01:20,147 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:01:20,179 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:01:20,290 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 35 for LOIs [2023-04-01 03:01:20,298 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:01:20,300 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:01:20,315 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:01:20,880 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3557#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((v_main_~b~0.base_BEFORE_CALL_23 Int)) (and (not (= (select (select |#memory_int| v_main_~b~0.base_BEFORE_CALL_23) 0) 1)) (<= (+ v_main_~b~0.base_BEFORE_CALL_23 1) |#StackHeapBarrier|))) (= |#NULL.base| 0))' at error location [2023-04-01 03:01:20,880 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:01:20,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:01:20,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2023-04-01 03:01:20,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678870404] [2023-04-01 03:01:20,880 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:01:20,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 03:01:20,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:01:20,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 03:01:20,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2023-04-01 03:01:20,881 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:01:21,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:01:21,354 INFO L93 Difference]: Finished difference Result 118 states and 146 transitions. [2023-04-01 03:01:21,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-01 03:01:21,354 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2023-04-01 03:01:21,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:01:21,355 INFO L225 Difference]: With dead ends: 118 [2023-04-01 03:01:21,356 INFO L226 Difference]: Without dead ends: 98 [2023-04-01 03:01:21,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=379, Invalid=2273, Unknown=0, NotChecked=0, Total=2652 [2023-04-01 03:01:21,357 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 32 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 03:01:21,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 76 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 03:01:21,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-04-01 03:01:21,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 77. [2023-04-01 03:01:21,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 58 states have (on average 1.2413793103448276) internal successors, (72), 62 states have internal predecessors, (72), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 03:01:21,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 94 transitions. [2023-04-01 03:01:21,378 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 94 transitions. Word has length 28 [2023-04-01 03:01:21,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:01:21,378 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 94 transitions. [2023-04-01 03:01:21,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:01:21,378 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 94 transitions. [2023-04-01 03:01:21,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 03:01:21,379 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:01:21,379 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:01:21,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-01 03:01:21,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-01 03:01:21,582 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:01:21,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:01:21,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1945180880, now seen corresponding path program 3 times [2023-04-01 03:01:21,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:01:21,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767792578] [2023-04-01 03:01:21,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:01:21,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:01:21,607 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:01:21,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [637648754] [2023-04-01 03:01:21,608 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 03:01:21,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:01:21,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:01:21,609 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:01:21,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-01 03:01:21,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 03:01:21,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:01:21,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 03:01:21,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:01:21,760 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 03:01:21,761 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:01:21,811 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 03:01:21,811 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:01:21,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767792578] [2023-04-01 03:01:21,811 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:01:21,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637648754] [2023-04-01 03:01:21,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637648754] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:01:21,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [80686511] [2023-04-01 03:01:21,813 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 03:01:21,813 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:01:21,813 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:01:21,813 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:01:21,813 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:01:21,846 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:01:22,105 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 64 for LOIs [2023-04-01 03:01:22,143 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:01:22,145 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:01:22,150 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:01:29,012 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4122#(and (<= 1 |#StackHeapBarrier|) (exists ((v_main_~i~0_BEFORE_CALL_32 Int) (|v_main_#t~mem13_BEFORE_CALL_30| Int) (v_main_~b~0.base_BEFORE_CALL_28 Int)) (and (<= ~N~0 (+ 2147483647 v_main_~i~0_BEFORE_CALL_32)) (or (and (<= (mod v_main_~i~0_BEFORE_CALL_32 4294967296) 2147483647) (= |v_main_#t~mem13_BEFORE_CALL_30| (select (select |#memory_int| v_main_~b~0.base_BEFORE_CALL_28) (* 8 (mod v_main_~i~0_BEFORE_CALL_32 4294967296))))) (and (< 2147483647 (mod v_main_~i~0_BEFORE_CALL_32 4294967296)) (= |v_main_#t~mem13_BEFORE_CALL_30| (select (select |#memory_int| v_main_~b~0.base_BEFORE_CALL_28) (+ (* 8 (mod v_main_~i~0_BEFORE_CALL_32 4294967296)) (- 34359738368)))))) (<= 1 (+ v_main_~i~0_BEFORE_CALL_32 |#StackHeapBarrier|)) (<= 1 (+ v_main_~i~0_BEFORE_CALL_32 ~N~0)) (not (= (+ (* 3 (* v_main_~i~0_BEFORE_CALL_32 v_main_~i~0_BEFORE_CALL_32)) (* v_main_~i~0_BEFORE_CALL_32 3) 1) |v_main_#t~mem13_BEFORE_CALL_30|)) (<= 0 v_main_~i~0_BEFORE_CALL_32) (<= (+ v_main_~b~0.base_BEFORE_CALL_28 1) |#StackHeapBarrier|) (< v_main_~i~0_BEFORE_CALL_32 ~N~0))) (<= ~N~0 2147483647) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:01:29,012 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:01:29,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:01:29,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-04-01 03:01:29,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976893980] [2023-04-01 03:01:29,013 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:01:29,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 03:01:29,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:01:29,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 03:01:29,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=717, Unknown=2, NotChecked=0, Total=812 [2023-04-01 03:01:29,014 INFO L87 Difference]: Start difference. First operand 77 states and 94 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 03:01:29,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:01:29,245 INFO L93 Difference]: Finished difference Result 111 states and 129 transitions. [2023-04-01 03:01:29,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 03:01:29,246 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2023-04-01 03:01:29,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:01:29,246 INFO L225 Difference]: With dead ends: 111 [2023-04-01 03:01:29,246 INFO L226 Difference]: Without dead ends: 91 [2023-04-01 03:01:29,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=137, Invalid=983, Unknown=2, NotChecked=0, Total=1122 [2023-04-01 03:01:29,247 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 19 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 03:01:29,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 99 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 03:01:29,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-04-01 03:01:29,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2023-04-01 03:01:29,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 61 states have (on average 1.180327868852459) internal successors, (72), 63 states have internal predecessors, (72), 12 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-01 03:01:29,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 93 transitions. [2023-04-01 03:01:29,261 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 93 transitions. Word has length 29 [2023-04-01 03:01:29,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:01:29,261 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 93 transitions. [2023-04-01 03:01:29,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 03:01:29,261 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 93 transitions. [2023-04-01 03:01:29,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 03:01:29,261 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:01:29,262 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:01:29,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-04-01 03:01:29,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-01 03:01:29,467 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:01:29,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:01:29,467 INFO L85 PathProgramCache]: Analyzing trace with hash -2037849506, now seen corresponding path program 7 times [2023-04-01 03:01:29,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:01:29,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956762395] [2023-04-01 03:01:29,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:01:29,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:01:29,488 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:01:29,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1331250068] [2023-04-01 03:01:29,488 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 03:01:29,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:01:29,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:01:29,489 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:01:29,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-01 03:01:29,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:01:29,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 14 conjunts are in the unsatisfiable core [2023-04-01 03:01:29,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:01:29,661 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 27 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 03:01:29,662 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:01:29,749 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 27 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 03:01:29,750 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:01:29,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956762395] [2023-04-01 03:01:29,750 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:01:29,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331250068] [2023-04-01 03:01:29,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331250068] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:01:29,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1359176176] [2023-04-01 03:01:29,751 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 03:01:29,751 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:01:29,751 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:01:29,751 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:01:29,751 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:01:29,774 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:01:29,873 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 35 for LOIs [2023-04-01 03:01:29,880 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:01:29,883 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:01:29,887 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:01:30,462 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4655#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((v_main_~b~0.base_BEFORE_CALL_31 Int)) (and (<= (+ v_main_~b~0.base_BEFORE_CALL_31 1) |#StackHeapBarrier|) (not (= (select (select |#memory_int| v_main_~b~0.base_BEFORE_CALL_31) 0) 1)))) (= |#NULL.base| 0))' at error location [2023-04-01 03:01:30,462 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:01:30,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:01:30,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2023-04-01 03:01:30,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942953301] [2023-04-01 03:01:30,463 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:01:30,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-01 03:01:30,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:01:30,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-01 03:01:30,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2023-04-01 03:01:30,464 INFO L87 Difference]: Start difference. First operand 80 states and 93 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:01:31,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:01:31,179 INFO L93 Difference]: Finished difference Result 138 states and 168 transitions. [2023-04-01 03:01:31,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-04-01 03:01:31,179 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2023-04-01 03:01:31,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:01:31,180 INFO L225 Difference]: With dead ends: 138 [2023-04-01 03:01:31,180 INFO L226 Difference]: Without dead ends: 119 [2023-04-01 03:01:31,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1211 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=633, Invalid=3657, Unknown=0, NotChecked=0, Total=4290 [2023-04-01 03:01:31,181 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 52 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 03:01:31,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 116 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 03:01:31,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-04-01 03:01:31,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 92. [2023-04-01 03:01:31,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 71 states have (on average 1.1971830985915493) internal successors, (85), 74 states have internal predecessors, (85), 14 states have call successors, (14), 8 states have call predecessors, (14), 6 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 03:01:31,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 110 transitions. [2023-04-01 03:01:31,203 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 110 transitions. Word has length 29 [2023-04-01 03:01:31,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:01:31,204 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 110 transitions. [2023-04-01 03:01:31,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:01:31,204 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 110 transitions. [2023-04-01 03:01:31,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 03:01:31,204 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:01:31,204 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:01:31,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-04-01 03:01:31,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-01 03:01:31,406 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:01:31,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:01:31,406 INFO L85 PathProgramCache]: Analyzing trace with hash 451710884, now seen corresponding path program 4 times [2023-04-01 03:01:31,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:01:31,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883643514] [2023-04-01 03:01:31,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:01:31,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:01:31,419 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:01:31,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1116646367] [2023-04-01 03:01:31,419 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 03:01:31,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:01:31,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:01:31,420 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:01:31,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-04-01 03:01:32,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:01:32,012 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 64 conjunts are in the unsatisfiable core [2023-04-01 03:01:32,016 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:01:32,028 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 [2023-04-01 03:01:32,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 03:01:32,033 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2023-04-01 03:01:32,041 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 20 treesize of output 20 [2023-04-01 03:01:32,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 03:01:32,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 03:01:32,075 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-04-01 03:01:32,075 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 1 case distinctions, treesize of input 26 treesize of output 28 [2023-04-01 03:01:32,110 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-04-01 03:01:32,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 43 [2023-04-01 03:01:32,147 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-04-01 03:01:32,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 50 [2023-04-01 03:01:32,219 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-04-01 03:01:32,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 46 treesize of output 50 [2023-04-01 03:01:32,268 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2023-04-01 03:01:32,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 62 treesize of output 65 [2023-04-01 03:01:32,316 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-04-01 03:01:32,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 79 treesize of output 77 [2023-04-01 03:01:32,685 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:01:32,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:01:47,552 WARN L223 SmtUtils]: Spent 5.76s on a formula simplification. DAG size of input: 82 DAG size of output: 45 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)