/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/bitvector/sum02-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 03:08:38,248 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 03:08:38,250 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 03:08:38,271 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 03:08:38,271 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 03:08:38,272 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 03:08:38,273 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 03:08:38,274 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 03:08:38,275 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 03:08:38,275 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 03:08:38,276 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 03:08:38,277 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 03:08:38,277 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 03:08:38,278 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 03:08:38,278 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 03:08:38,279 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 03:08:38,279 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 03:08:38,280 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 03:08:38,281 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 03:08:38,282 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 03:08:38,283 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 03:08:38,284 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 03:08:38,284 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 03:08:38,285 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 03:08:38,287 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 03:08:38,287 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 03:08:38,288 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 03:08:38,288 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 03:08:38,289 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 03:08:38,289 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 03:08:38,289 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 03:08:38,290 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 03:08:38,290 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 03:08:38,291 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 03:08:38,291 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 03:08:38,292 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 03:08:38,292 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 03:08:38,292 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 03:08:38,293 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 03:08:38,293 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 03:08:38,294 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 03:08:38,295 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 03:08:38,309 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 03:08:38,309 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 03:08:38,309 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 03:08:38,309 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 03:08:38,310 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 03:08:38,310 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 03:08:38,310 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 03:08:38,310 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 03:08:38,310 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 03:08:38,310 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 03:08:38,310 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 03:08:38,311 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 03:08:38,311 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 03:08:38,311 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 03:08:38,311 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 03:08:38,311 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 03:08:38,311 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 03:08:38,311 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 03:08:38,312 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 03:08:38,312 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 03:08:38,312 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 03:08:38,312 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 03:08:38,312 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 03:08:38,312 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 03:08:38,312 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 03:08:38,313 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 03:08:38,313 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 03:08:38,313 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 03:08:38,313 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 03:08:38,313 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 03:08:38,313 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 03:08:38,313 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 03:08:38,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:08:38,314 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 03:08:38,314 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 03:08:38,314 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 03:08:38,314 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 03:08:38,314 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 03:08:38,314 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 03:08:38,314 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 03:08:38,314 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 03:08:38,314 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 03:08:38,461 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 03:08:38,481 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 03:08:38,483 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 03:08:38,484 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 03:08:38,485 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 03:08:38,486 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/sum02-2.c [2023-04-01 03:08:39,560 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 03:08:39,721 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 03:08:39,722 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/sum02-2.c [2023-04-01 03:08:39,726 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8659bab98/35f0ac8966d0422aa778033d964d8384/FLAG4224c3704 [2023-04-01 03:08:39,738 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8659bab98/35f0ac8966d0422aa778033d964d8384 [2023-04-01 03:08:39,740 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 03:08:39,741 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 03:08:39,743 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 03:08:39,743 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 03:08:39,745 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 03:08:39,746 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:08:39" (1/1) ... [2023-04-01 03:08:39,747 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7deecb38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:08:39, skipping insertion in model container [2023-04-01 03:08:39,747 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:08:39" (1/1) ... [2023-04-01 03:08:39,752 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 03:08:39,760 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 03:08:39,856 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/bitvector/sum02-2.c[711,724] [2023-04-01 03:08:39,868 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:08:39,877 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 03:08:39,902 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/bitvector/sum02-2.c[711,724] [2023-04-01 03:08:39,906 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:08:39,916 INFO L208 MainTranslator]: Completed translation [2023-04-01 03:08:39,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:08:39 WrapperNode [2023-04-01 03:08:39,916 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 03:08:39,917 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 03:08:39,917 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 03:08:39,917 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 03:08:39,925 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:08:39" (1/1) ... [2023-04-01 03:08:39,925 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:08:39" (1/1) ... [2023-04-01 03:08:39,929 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:08:39" (1/1) ... [2023-04-01 03:08:39,929 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:08:39" (1/1) ... [2023-04-01 03:08:39,940 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:08:39" (1/1) ... [2023-04-01 03:08:39,942 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:08:39" (1/1) ... [2023-04-01 03:08:39,943 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:08:39" (1/1) ... [2023-04-01 03:08:39,943 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:08:39" (1/1) ... [2023-04-01 03:08:39,949 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 03:08:39,950 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 03:08:39,950 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 03:08:39,950 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 03:08:39,951 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:08:39" (1/1) ... [2023-04-01 03:08:39,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:08:39,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:08:39,988 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 03:08:39,993 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 03:08:40,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 03:08:40,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 03:08:40,018 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 03:08:40,018 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 03:08:40,018 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 03:08:40,018 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 03:08:40,019 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 03:08:40,019 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 03:08:40,019 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 03:08:40,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 03:08:40,019 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 03:08:40,019 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 03:08:40,019 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-04-01 03:08:40,019 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 03:08:40,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 03:08:40,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 03:08:40,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 03:08:40,021 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 03:08:40,021 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 03:08:40,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 03:08:40,081 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 03:08:40,083 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 03:08:40,206 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 03:08:40,232 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 03:08:40,232 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 03:08:40,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:08:40 BoogieIcfgContainer [2023-04-01 03:08:40,235 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 03:08:40,237 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 03:08:40,237 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 03:08:40,240 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 03:08:40,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 03:08:39" (1/3) ... [2023-04-01 03:08:40,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13d63004 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:08:40, skipping insertion in model container [2023-04-01 03:08:40,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:08:39" (2/3) ... [2023-04-01 03:08:40,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13d63004 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:08:40, skipping insertion in model container [2023-04-01 03:08:40,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:08:40" (3/3) ... [2023-04-01 03:08:40,243 INFO L112 eAbstractionObserver]: Analyzing ICFG sum02-2.c [2023-04-01 03:08:40,257 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 03:08:40,257 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 03:08:40,306 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 03:08:40,320 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;@4088ca1e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 03:08:40,321 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 03:08:40,324 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 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 03:08:40,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-01 03:08:40,330 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:08:40,331 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:08:40,332 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:08:40,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:08:40,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1971999329, now seen corresponding path program 1 times [2023-04-01 03:08:40,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:08:40,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144066676] [2023-04-01 03:08:40,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:08:40,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:08:40,424 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:08:40,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2126311596] [2023-04-01 03:08:40,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:08:40,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:08:40,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:08:40,428 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 03:08:40,431 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 03:08:40,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:08:40,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 03:08:40,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:08:40,507 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 03:08:40,507 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 03:08:40,507 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:08:40,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144066676] [2023-04-01 03:08:40,507 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:08:40,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126311596] [2023-04-01 03:08:40,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126311596] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:08:40,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:08:40,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 03:08:40,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717116181] [2023-04-01 03:08:40,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:08:40,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 03:08:40,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:08:40,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 03:08:40,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 03:08:40,592 INFO L87 Difference]: Start difference. First operand has 21 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 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 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 03:08:40,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:08:40,614 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2023-04-01 03:08:40,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 03:08:40,616 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 14 [2023-04-01 03:08:40,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:08:40,620 INFO L225 Difference]: With dead ends: 33 [2023-04-01 03:08:40,620 INFO L226 Difference]: Without dead ends: 16 [2023-04-01 03:08:40,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 03:08:40,624 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 03:08:40,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 03:08:40,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-04-01 03:08:40,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-04-01 03:08:40,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 4 states have call successors, (4), 4 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 03:08:40,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2023-04-01 03:08:40,671 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2023-04-01 03:08:40,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:08:40,671 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2023-04-01 03:08:40,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 03:08:40,671 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2023-04-01 03:08:40,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-01 03:08:40,672 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:08:40,672 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:08:40,680 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 03:08:40,877 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 03:08:40,877 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:08:40,878 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:08:40,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1107334072, now seen corresponding path program 1 times [2023-04-01 03:08:40,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:08:40,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852390842] [2023-04-01 03:08:40,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:08:40,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:08:40,899 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:08:40,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [827399852] [2023-04-01 03:08:40,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:08:40,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:08:40,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:08:40,913 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 03:08:40,925 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 03:08:40,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:08:40,998 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-01 03:08:41,000 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:08:41,131 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 03:08:41,131 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:08:41,319 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 03:08:41,319 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:08:41,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852390842] [2023-04-01 03:08:41,319 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:08:41,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827399852] [2023-04-01 03:08:41,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827399852] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:08:41,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [82170918] [2023-04-01 03:08:41,333 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-01 03:08:41,334 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:08:41,336 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:08:41,339 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:08:41,340 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:08:41,391 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 03:08:41,527 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-01 03:08:41,579 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-01 03:08:41,581 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 03:08:41,587 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:08:43,086 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '235#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:08:43,086 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:08:43,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:08:43,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2023-04-01 03:08:43,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150909249] [2023-04-01 03:08:43,086 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:08:43,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 03:08:43,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:08:43,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 03:08:43,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2023-04-01 03:08:43,089 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 11 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 03:08:43,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:08:43,161 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2023-04-01 03:08:43,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 03:08:43,162 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 15 [2023-04-01 03:08:43,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:08:43,163 INFO L225 Difference]: With dead ends: 22 [2023-04-01 03:08:43,163 INFO L226 Difference]: Without dead ends: 17 [2023-04-01 03:08:43,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2023-04-01 03:08:43,166 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 03:08:43,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 56 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 03:08:43,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-04-01 03:08:43,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-04-01 03:08:43,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 4 states have call successors, (4), 4 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 03:08:43,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2023-04-01 03:08:43,175 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2023-04-01 03:08:43,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:08:43,176 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2023-04-01 03:08:43,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 03:08:43,176 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2023-04-01 03:08:43,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-01 03:08:43,176 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:08:43,177 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:08:43,191 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 03:08:43,381 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 03:08:43,382 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:08:43,383 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:08:43,383 INFO L85 PathProgramCache]: Analyzing trace with hash -72514881, now seen corresponding path program 2 times [2023-04-01 03:08:43,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:08:43,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143560386] [2023-04-01 03:08:43,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:08:43,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:08:43,403 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:08:43,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1659836540] [2023-04-01 03:08:43,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 03:08:43,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:08:43,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:08:43,408 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 03:08:43,408 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 03:08:43,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 03:08:43,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:08:43,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 30 conjunts are in the unsatisfiable core [2023-04-01 03:08:43,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:08:43,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:08:43,677 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:08:57,143 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:08:57,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143560386] [2023-04-01 03:08:57,143 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:08:57,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659836540] [2023-04-01 03:08:57,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659836540] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:08:57,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1893810283] [2023-04-01 03:08:57,146 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-01 03:08:57,146 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:08:57,146 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:08:57,146 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:08:57,146 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:08:57,177 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 03:08:57,265 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-01 03:08:57,543 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-01 03:08:57,546 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 03:08:57,554 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:09:06,558 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '400#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:09:06,559 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:09:06,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-01 03:09:06,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-04-01 03:09:06,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418790862] [2023-04-01 03:09:06,559 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-01 03:09:06,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 03:09:06,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:09:06,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 03:09:06,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=658, Unknown=3, NotChecked=0, Total=756 [2023-04-01 03:09:06,561 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 10 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (4), 2 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 03:09:06,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:09:06,874 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2023-04-01 03:09:06,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 03:09:06,876 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (4), 2 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 16 [2023-04-01 03:09:06,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:09:06,877 INFO L225 Difference]: With dead ends: 23 [2023-04-01 03:09:06,877 INFO L226 Difference]: Without dead ends: 18 [2023-04-01 03:09:06,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=109, Invalid=758, Unknown=3, NotChecked=0, Total=870 [2023-04-01 03:09:06,878 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 03:09:06,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 55 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 03:09:06,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-04-01 03:09:06,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-04-01 03:09:06,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 4 states have call successors, (4), 4 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 03:09:06,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2023-04-01 03:09:06,885 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2023-04-01 03:09:06,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:09:06,886 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2023-04-01 03:09:06,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (4), 2 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 03:09:06,886 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2023-04-01 03:09:06,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-01 03:09:06,887 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:09:06,887 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:09:06,904 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 03:09:07,087 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 03:09:07,088 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:09:07,088 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:09:07,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1942108968, now seen corresponding path program 3 times [2023-04-01 03:09:07,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:09:07,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034470825] [2023-04-01 03:09:07,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:09:07,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:09:07,102 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:09:07,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1046145746] [2023-04-01 03:09:07,102 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 03:09:07,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:09:07,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:09:07,121 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 03:09:07,122 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 03:09:07,234 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 03:09:07,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:09:07,250 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 34 conjunts are in the unsatisfiable core [2023-04-01 03:09:07,251 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:09:07,464 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 03:09:07,465 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:09:18,948 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:09:18,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034470825] [2023-04-01 03:09:18,949 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:09:18,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046145746] [2023-04-01 03:09:18,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046145746] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:09:18,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1714224407] [2023-04-01 03:09:18,951 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-01 03:09:18,951 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:09:18,951 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:09:18,951 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:09:18,952 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:09:18,971 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 03:09:19,074 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-01 03:09:20,272 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-01 03:09:20,274 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 03:09:20,279 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:09:29,832 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '579#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:09:29,832 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:09:29,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-01 03:09:29,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-04-01 03:09:29,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602150573] [2023-04-01 03:09:29,832 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-01 03:09:29,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 03:09:29,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:09:29,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 03:09:29,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=763, Unknown=1, NotChecked=0, Total=870 [2023-04-01 03:09:29,834 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 11 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (4), 2 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 03:09:30,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:09:30,353 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2023-04-01 03:09:30,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 03:09:30,354 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (4), 2 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 17 [2023-04-01 03:09:30,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:09:30,354 INFO L225 Difference]: With dead ends: 24 [2023-04-01 03:09:30,354 INFO L226 Difference]: Without dead ends: 19 [2023-04-01 03:09:30,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=121, Invalid=870, Unknown=1, NotChecked=0, Total=992 [2023-04-01 03:09:30,356 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 03:09:30,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 60 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 03:09:30,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-04-01 03:09:30,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-04-01 03:09:30,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 4 states have call successors, (4), 4 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 03:09:30,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2023-04-01 03:09:30,358 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2023-04-01 03:09:30,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:09:30,359 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2023-04-01 03:09:30,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (4), 2 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 03:09:30,359 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2023-04-01 03:09:30,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 03:09:30,359 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:09:30,359 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:09:30,377 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 03:09:30,560 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 03:09:30,560 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:09:30,560 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:09:30,560 INFO L85 PathProgramCache]: Analyzing trace with hash -29061153, now seen corresponding path program 4 times [2023-04-01 03:09:30,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:09:30,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711506097] [2023-04-01 03:09:30,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:09:30,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:09:30,571 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:09:30,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1507115333] [2023-04-01 03:09:30,571 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 03:09:30,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:09:30,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:09:30,581 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 03:09:30,583 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 03:09:30,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:09:30,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 39 conjunts are in the unsatisfiable core [2023-04-01 03:09:30,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:09:30,892 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:09:30,892 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:09:54,261 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:09:54,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711506097] [2023-04-01 03:09:54,261 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:09:54,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507115333] [2023-04-01 03:09:54,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507115333] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:09:54,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1651173533] [2023-04-01 03:09:54,263 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-01 03:09:54,263 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:09:54,263 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:09:54,263 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:09:54,263 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:09:54,287 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 03:09:54,324 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-01 03:09:54,403 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-01 03:09:54,404 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 03:09:54,411 INFO L180 IcfgInterpreter]: Interpretation finished