/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/ss2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 03:06:13,170 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 03:06:13,172 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 03:06:13,205 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 03:06:13,206 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 03:06:13,208 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 03:06:13,212 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 03:06:13,214 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 03:06:13,215 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 03:06:13,218 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 03:06:13,219 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 03:06:13,221 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 03:06:13,221 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 03:06:13,222 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 03:06:13,223 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 03:06:13,224 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 03:06:13,225 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 03:06:13,225 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 03:06:13,226 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 03:06:13,230 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 03:06:13,231 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 03:06:13,232 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 03:06:13,232 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 03:06:13,233 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 03:06:13,240 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 03:06:13,240 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 03:06:13,240 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 03:06:13,241 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 03:06:13,241 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 03:06:13,242 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 03:06:13,242 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 03:06:13,242 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 03:06:13,244 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 03:06:13,244 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 03:06:13,245 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 03:06:13,245 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 03:06:13,245 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 03:06:13,245 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 03:06:13,245 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 03:06:13,246 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 03:06:13,246 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 03:06:13,247 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 03:06:13,280 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 03:06:13,280 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 03:06:13,281 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 03:06:13,281 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 03:06:13,281 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 03:06:13,281 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 03:06:13,282 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 03:06:13,282 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 03:06:13,282 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 03:06:13,282 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 03:06:13,282 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 03:06:13,283 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 03:06:13,283 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 03:06:13,283 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 03:06:13,283 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 03:06:13,283 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 03:06:13,283 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 03:06:13,283 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 03:06:13,284 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 03:06:13,284 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 03:06:13,284 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 03:06:13,284 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 03:06:13,284 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 03:06:13,284 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 03:06:13,284 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 03:06:13,284 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 03:06:13,285 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 03:06:13,285 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 03:06:13,285 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 03:06:13,285 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 03:06:13,285 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 03:06:13,292 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 03:06:13,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:06:13,293 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 03:06:13,293 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 03:06:13,293 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 03:06:13,293 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 03:06:13,293 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 03:06:13,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 03:06:13,293 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 03:06:13,294 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 03:06:13,294 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 03:06:13,582 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 03:06:13,604 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 03:06:13,606 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 03:06:13,607 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 03:06:13,608 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 03:06:13,609 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/ss2.c [2023-04-01 03:06:14,900 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 03:06:15,068 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 03:06:15,068 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ss2.c [2023-04-01 03:06:15,072 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c327d624/dfba271008c54a42970d823548eb1cd3/FLAG4fe2ebdc6 [2023-04-01 03:06:15,087 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c327d624/dfba271008c54a42970d823548eb1cd3 [2023-04-01 03:06:15,090 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 03:06:15,091 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 03:06:15,091 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 03:06:15,092 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 03:06:15,096 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 03:06:15,097 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:06:15" (1/1) ... [2023-04-01 03:06:15,099 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@179ac548 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:06:15, skipping insertion in model container [2023-04-01 03:06:15,099 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:06:15" (1/1) ... [2023-04-01 03:06:15,104 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 03:06:15,116 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 03:06:15,257 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/ss2.c[586,599] [2023-04-01 03:06:15,303 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:06:15,318 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 03:06:15,333 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/ss2.c[586,599] [2023-04-01 03:06:15,362 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:06:15,377 INFO L208 MainTranslator]: Completed translation [2023-04-01 03:06:15,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:06:15 WrapperNode [2023-04-01 03:06:15,378 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 03:06:15,379 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 03:06:15,379 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 03:06:15,379 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 03:06:15,387 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:06:15" (1/1) ... [2023-04-01 03:06:15,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:06:15" (1/1) ... [2023-04-01 03:06:15,405 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:06:15" (1/1) ... [2023-04-01 03:06:15,406 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:06:15" (1/1) ... [2023-04-01 03:06:15,415 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:06:15" (1/1) ... [2023-04-01 03:06:15,425 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:06:15" (1/1) ... [2023-04-01 03:06:15,427 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:06:15" (1/1) ... [2023-04-01 03:06:15,427 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:06:15" (1/1) ... [2023-04-01 03:06:15,429 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 03:06:15,430 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 03:06:15,430 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 03:06:15,430 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 03:06:15,431 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:06:15" (1/1) ... [2023-04-01 03:06:15,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:06:15,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:06:15,559 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 03:06:15,583 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 03:06:15,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 03:06:15,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 03:06:15,598 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 03:06:15,599 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 03:06:15,599 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 03:06:15,599 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 03:06:15,600 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 03:06:15,600 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 03:06:15,600 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 03:06:15,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 03:06:15,600 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 03:06:15,600 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 03:06:15,600 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 03:06:15,600 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 03:06:15,601 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 03:06:15,601 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 03:06:15,601 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 03:06:15,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 03:06:15,601 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 03:06:15,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 03:06:15,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 03:06:15,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 03:06:15,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 03:06:15,680 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 03:06:15,681 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 03:06:15,809 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 03:06:15,848 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 03:06:15,848 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-04-01 03:06:15,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:06:15 BoogieIcfgContainer [2023-04-01 03:06:15,850 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 03:06:15,851 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 03:06:15,852 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 03:06:15,854 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 03:06:15,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 03:06:15" (1/3) ... [2023-04-01 03:06:15,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d3ada6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:06:15, skipping insertion in model container [2023-04-01 03:06:15,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:06:15" (2/3) ... [2023-04-01 03:06:15,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d3ada6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:06:15, skipping insertion in model container [2023-04-01 03:06:15,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:06:15" (3/3) ... [2023-04-01 03:06:15,855 INFO L112 eAbstractionObserver]: Analyzing ICFG ss2.c [2023-04-01 03:06:15,867 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 03:06:15,867 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 03:06:15,894 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 03:06:15,899 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;@41d6bcc6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 03:06:15,899 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 03:06:15,907 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 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 03:06:15,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 03:06:15,931 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:06:15,932 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:06:15,933 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:06:15,940 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:06:15,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1106505574, now seen corresponding path program 1 times [2023-04-01 03:06:15,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:06:15,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437548293] [2023-04-01 03:06:15,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:06:15,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:06:16,151 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:06:16,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [137458962] [2023-04-01 03:06:16,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:06:16,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:06:16,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:06:16,171 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 03:06:16,186 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 03:06:16,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:06:16,334 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 03:06:16,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:06:16,415 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 03:06:16,415 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 03:06:16,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:06:16,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437548293] [2023-04-01 03:06:16,416 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:06:16,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137458962] [2023-04-01 03:06:16,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137458962] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:06:16,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:06:16,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 03:06:16,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301221202] [2023-04-01 03:06:16,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:06:16,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 03:06:16,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:06:16,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 03:06:16,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 03:06:16,440 INFO L87 Difference]: Start difference. First operand has 29 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 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 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:06:16,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:06:16,536 INFO L93 Difference]: Finished difference Result 60 states and 83 transitions. [2023-04-01 03:06:16,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 03:06:16,539 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2023-04-01 03:06:16,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:06:16,545 INFO L225 Difference]: With dead ends: 60 [2023-04-01 03:06:16,545 INFO L226 Difference]: Without dead ends: 34 [2023-04-01 03:06:16,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 03:06:16,551 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 27 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 03:06:16,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 39 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 03:06:16,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-04-01 03:06:16,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2023-04-01 03:06:16,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 03:06:16,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2023-04-01 03:06:16,586 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 21 [2023-04-01 03:06:16,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:06:16,586 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2023-04-01 03:06:16,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:06:16,586 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2023-04-01 03:06:16,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-01 03:06:16,588 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:06:16,588 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:06:16,598 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 03:06:16,795 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 03:06:16,795 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:06:16,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:06:16,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1184395259, now seen corresponding path program 1 times [2023-04-01 03:06:16,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:06:16,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276529707] [2023-04-01 03:06:16,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:06:16,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:06:16,887 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:06:16,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1209828823] [2023-04-01 03:06:16,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:06:16,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:06:16,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:06:16,894 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 03:06:16,911 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 03:06:17,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:06:17,017 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 64 conjunts are in the unsatisfiable core [2023-04-01 03:06:17,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:06:17,123 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 03:06:17,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 03:06:17,202 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 03:06:17,300 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 26 treesize of output 21 [2023-04-01 03:06:17,411 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 26 treesize of output 21 [2023-04-01 03:06:17,538 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 26 treesize of output 21 [2023-04-01 03:06:17,575 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 26 treesize of output 21 [2023-04-01 03:06:17,662 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 26 treesize of output 21 [2023-04-01 03:06:17,833 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 03:06:17,833 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:06:19,354 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 03:06:19,772 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 03:06:19,772 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:06:19,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276529707] [2023-04-01 03:06:19,773 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:06:19,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209828823] [2023-04-01 03:06:19,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209828823] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:06:19,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1180150779] [2023-04-01 03:06:19,799 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-01 03:06:19,800 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:06:19,803 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:06:19,810 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:06:19,810 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:06:19,936 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:06:20,359 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 38 for LOIs [2023-04-01 03:06:20,379 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:06:20,385 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:06:20,395 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:06:21,681 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '436#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (exists ((v_main_~a~0.base_BEFORE_CALL_1 Int)) (and (not (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_1) 0))) (<= (+ v_main_~a~0.base_BEFORE_CALL_1 1) |#StackHeapBarrier|))) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:06:21,681 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:06:21,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:06:21,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 38 [2023-04-01 03:06:21,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624318600] [2023-04-01 03:06:21,682 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:06:21,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-04-01 03:06:21,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:06:21,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-04-01 03:06:21,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=2478, Unknown=0, NotChecked=0, Total=2756 [2023-04-01 03:06:21,688 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 38 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 34 states have internal predecessors, (39), 5 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 03:06:28,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:06:28,303 INFO L93 Difference]: Finished difference Result 76 states and 98 transitions. [2023-04-01 03:06:28,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-04-01 03:06:28,307 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 34 states have internal predecessors, (39), 5 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2023-04-01 03:06:28,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:06:28,308 INFO L225 Difference]: With dead ends: 76 [2023-04-01 03:06:28,309 INFO L226 Difference]: Without dead ends: 63 [2023-04-01 03:06:28,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=458, Invalid=3964, Unknown=0, NotChecked=0, Total=4422 [2023-04-01 03:06:28,311 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 138 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-04-01 03:06:28,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 138 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 837 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-04-01 03:06:28,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-04-01 03:06:28,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 49. [2023-04-01 03:06:28,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 39 states have (on average 1.358974358974359) internal successors, (53), 40 states have internal predecessors, (53), 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 03:06:28,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2023-04-01 03:06:28,359 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 27 [2023-04-01 03:06:28,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:06:28,359 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2023-04-01 03:06:28,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 34 states have internal predecessors, (39), 5 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 03:06:28,360 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2023-04-01 03:06:28,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 03:06:28,361 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:06:28,361 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:06:28,378 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 03:06:28,561 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 03:06:28,562 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:06:28,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:06:28,562 INFO L85 PathProgramCache]: Analyzing trace with hash 600603394, now seen corresponding path program 2 times [2023-04-01 03:06:28,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:06:28,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167282646] [2023-04-01 03:06:28,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:06:28,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:06:28,606 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:06:28,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1136639906] [2023-04-01 03:06:28,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 03:06:28,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:06:28,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:06:28,623 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 03:06:28,633 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 03:06:28,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 03:06:28,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:06:28,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 03:06:28,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:06:28,746 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 03:06:28,746 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:06:28,775 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 03:06:28,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:06:28,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167282646] [2023-04-01 03:06:28,775 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:06:28,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136639906] [2023-04-01 03:06:28,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136639906] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:06:28,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1638461587] [2023-04-01 03:06:28,777 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-01 03:06:28,777 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:06:28,777 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:06:28,777 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:06:28,777 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:06:28,799 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:06:29,017 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 38 for LOIs [2023-04-01 03:06:29,028 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:06:29,031 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:06:29,036 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:06:29,523 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '868#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (exists ((v_main_~a~0.base_BEFORE_CALL_2 Int)) (and (<= (+ v_main_~a~0.base_BEFORE_CALL_2 1) |#StackHeapBarrier|) (not (= (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_2) 0) (+ (* 2 ~N~0) (* ~N~0 ~N~0)))))) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:06:29,523 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:06:29,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:06:29,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-04-01 03:06:29,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091602984] [2023-04-01 03:06:29,523 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:06:29,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 03:06:29,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:06:29,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 03:06:29,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2023-04-01 03:06:29,525 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 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 03:06:29,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:06:29,703 INFO L93 Difference]: Finished difference Result 100 states and 129 transitions. [2023-04-01 03:06:29,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 03:06:29,704 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 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 03:06:29,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:06:29,706 INFO L225 Difference]: With dead ends: 100 [2023-04-01 03:06:29,707 INFO L226 Difference]: Without dead ends: 72 [2023-04-01 03:06:29,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2023-04-01 03:06:29,711 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 23 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 03:06:29,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 80 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 03:06:29,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-04-01 03:06:29,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 56. [2023-04-01 03:06:29,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 46 states have (on average 1.326086956521739) internal successors, (61), 47 states have internal predecessors, (61), 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 03:06:29,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2023-04-01 03:06:29,730 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 28 [2023-04-01 03:06:29,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:06:29,730 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2023-04-01 03:06:29,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 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 03:06:29,730 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2023-04-01 03:06:29,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 03:06:29,731 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:06:29,731 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:06:29,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-01 03:06:29,942 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 03:06:29,943 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:06:29,943 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:06:29,943 INFO L85 PathProgramCache]: Analyzing trace with hash -2099531845, now seen corresponding path program 3 times [2023-04-01 03:06:29,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:06:29,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196548268] [2023-04-01 03:06:29,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:06:29,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:06:29,985 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:06:29,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1683035694] [2023-04-01 03:06:29,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 03:06:29,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:06:29,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:06:29,996 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 03:06:30,025 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 03:06:30,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 03:06:30,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:06:30,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 03:06:30,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:06:30,113 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 03:06:30,113 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:06:30,156 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 03:06:30,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:06:30,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196548268] [2023-04-01 03:06:30,156 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:06:30,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683035694] [2023-04-01 03:06:30,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683035694] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:06:30,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [421492979] [2023-04-01 03:06:30,160 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-01 03:06:30,160 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:06:30,160 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:06:30,161 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:06:30,161 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:06:30,192 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:06:30,513 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 38 for LOIs [2023-04-01 03:06:30,541 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:06:30,544 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:06:30,565 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:06:31,142 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1345#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((v_main_~a~0.base_BEFORE_CALL_3 Int)) (and (not (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_3) 0))) (<= (+ v_main_~a~0.base_BEFORE_CALL_3 1) |#StackHeapBarrier|))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:06:31,143 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:06:31,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:06:31,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-04-01 03:06:31,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5497892] [2023-04-01 03:06:31,143 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:06:31,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 03:06:31,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:06:31,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 03:06:31,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2023-04-01 03:06:31,145 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 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 03:06:31,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:06:31,272 INFO L93 Difference]: Finished difference Result 92 states and 113 transitions. [2023-04-01 03:06:31,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 03:06:31,273 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 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 03:06:31,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:06:31,274 INFO L225 Difference]: With dead ends: 92 [2023-04-01 03:06:31,274 INFO L226 Difference]: Without dead ends: 43 [2023-04-01 03:06:31,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2023-04-01 03:06:31,275 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 11 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 03:06:31,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 54 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 03:06:31,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-04-01 03:06:31,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2023-04-01 03:06:31,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 03:06:31,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2023-04-01 03:06:31,284 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 29 [2023-04-01 03:06:31,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:06:31,284 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2023-04-01 03:06:31,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 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 03:06:31,285 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2023-04-01 03:06:31,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-01 03:06:31,285 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:06:31,285 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:06:31,304 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 03:06:31,491 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 03:06:31,492 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:06:31,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:06:31,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1711159494, now seen corresponding path program 4 times [2023-04-01 03:06:31,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:06:31,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225251012] [2023-04-01 03:06:31,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:06:31,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:06:31,560 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:06:31,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [772843850] [2023-04-01 03:06:31,561 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 03:06:31,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:06:31,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:06:31,562 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 03:06:31,564 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 03:06:31,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:06:31,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 98 conjunts are in the unsatisfiable core [2023-04-01 03:06:31,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:06:31,703 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 03:06:31,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 03:06:31,741 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 03:06:31,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-04-01 03:06:31,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-04-01 03:06:31,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-04-01 03:06:32,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-04-01 03:06:32,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-04-01 03:06:32,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-04-01 03:06:32,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-04-01 03:06:32,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-04-01 03:06:32,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-04-01 03:06:32,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-04-01 03:06:32,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-04-01 03:06:32,855 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:06:32,855 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:06:42,363 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 03:06:42,391 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:06:42,391 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:06:42,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225251012] [2023-04-01 03:06:42,391 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:06:42,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772843850] [2023-04-01 03:06:42,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772843850] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:06:42,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1329988467] [2023-04-01 03:06:42,393 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-01 03:06:42,393 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:06:42,393 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:06:42,393 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:06:42,394 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:06:42,445 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:06:42,781 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 38 for LOIs [2023-04-01 03:06:42,806 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:06:42,808 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:06:42,813 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:06:44,878 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1830#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((v_main_~a~0.base_BEFORE_CALL_4 Int)) (and (<= (+ v_main_~a~0.base_BEFORE_CALL_4 1) |#StackHeapBarrier|) (not (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_4) 0))))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:06:44,879 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:06:44,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:06:44,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24] total 48 [2023-04-01 03:06:44,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195812210] [2023-04-01 03:06:44,879 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:06:44,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-04-01 03:06:44,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:06:44,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-04-01 03:06:44,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=3663, Unknown=0, NotChecked=0, Total=3906 [2023-04-01 03:06:44,881 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 48 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 45 states have internal predecessors, (50), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3)