/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 IntervalDomain -i ../sv-benchmarks/c/array-multidimensional/transpose-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 20:53:17,549 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 20:53:17,551 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 20:53:17,583 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 20:53:17,583 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 20:53:17,585 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 20:53:17,590 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 20:53:17,591 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 20:53:17,592 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 20:53:17,596 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 20:53:17,597 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 20:53:17,598 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 20:53:17,598 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 20:53:17,600 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 20:53:17,601 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 20:53:17,602 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 20:53:17,602 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 20:53:17,603 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 20:53:17,604 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 20:53:17,606 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 20:53:17,606 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 20:53:17,607 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 20:53:17,608 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 20:53:17,609 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 20:53:17,616 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 20:53:17,616 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 20:53:17,616 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 20:53:17,617 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 20:53:17,618 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 20:53:17,618 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 20:53:17,618 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 20:53:17,619 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 20:53:17,620 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 20:53:17,620 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 20:53:17,621 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 20:53:17,621 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 20:53:17,621 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 20:53:17,621 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 20:53:17,621 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 20:53:17,622 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 20:53:17,622 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 20:53:17,623 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 [2023-03-31 20:53:17,646 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 20:53:17,647 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 20:53:17,647 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 20:53:17,647 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 20:53:17,648 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 20:53:17,648 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 20:53:17,648 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 20:53:17,648 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 20:53:17,648 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 20:53:17,648 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 20:53:17,649 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 20:53:17,649 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 20:53:17,649 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 20:53:17,649 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 20:53:17,649 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 20:53:17,649 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 20:53:17,649 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 20:53:17,649 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 20:53:17,650 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 20:53:17,650 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 20:53:17,650 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 20:53:17,650 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 20:53:17,650 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 20:53:17,650 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 20:53:17,650 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 20:53:17,651 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 20:53:17,651 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 20:53:17,651 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 20:53:17,651 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 20:53:17,651 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 20:53:17,651 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 20:53:17,652 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 20:53:17,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 20:53:17,652 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 20:53:17,652 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 20:53:17,652 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 20:53:17,652 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 20:53:17,652 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 20:53:17,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 20:53:17,652 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 20:53:17,652 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 20:53:17,652 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 20:53:17,840 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 20:53:17,857 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 20:53:17,861 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 20:53:17,862 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 20:53:17,862 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 20:53:17,863 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/transpose-u.c [2023-03-31 20:53:18,948 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 20:53:19,088 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 20:53:19,088 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/transpose-u.c [2023-03-31 20:53:19,092 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e156fa290/d2fbe66d78fe44c2a65affb284141b28/FLAG8917fc97b [2023-03-31 20:53:19,101 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e156fa290/d2fbe66d78fe44c2a65affb284141b28 [2023-03-31 20:53:19,103 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 20:53:19,104 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 20:53:19,105 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 20:53:19,105 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 20:53:19,107 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 20:53:19,108 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 08:53:19" (1/1) ... [2023-03-31 20:53:19,108 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f545ba0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:53:19, skipping insertion in model container [2023-03-31 20:53:19,108 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 08:53:19" (1/1) ... [2023-03-31 20:53:19,113 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 20:53:19,120 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 20:53:19,214 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-multidimensional/transpose-u.c[315,328] [2023-03-31 20:53:19,231 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 20:53:19,239 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 20:53:19,247 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-multidimensional/transpose-u.c[315,328] [2023-03-31 20:53:19,252 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 20:53:19,261 INFO L208 MainTranslator]: Completed translation [2023-03-31 20:53:19,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:53:19 WrapperNode [2023-03-31 20:53:19,262 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 20:53:19,262 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 20:53:19,263 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 20:53:19,263 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 20:53:19,270 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:53:19" (1/1) ... [2023-03-31 20:53:19,270 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:53:19" (1/1) ... [2023-03-31 20:53:19,274 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:53:19" (1/1) ... [2023-03-31 20:53:19,274 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:53:19" (1/1) ... [2023-03-31 20:53:19,278 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:53:19" (1/1) ... [2023-03-31 20:53:19,281 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:53:19" (1/1) ... [2023-03-31 20:53:19,282 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:53:19" (1/1) ... [2023-03-31 20:53:19,282 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:53:19" (1/1) ... [2023-03-31 20:53:19,284 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 20:53:19,285 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 20:53:19,285 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 20:53:19,285 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 20:53:19,286 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:53:19" (1/1) ... [2023-03-31 20:53:19,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 20:53:19,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:53:19,317 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) [2023-03-31 20:53:19,323 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 [2023-03-31 20:53:19,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 20:53:19,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 20:53:19,344 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 20:53:19,344 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 20:53:19,344 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 20:53:19,344 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 20:53:19,344 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 20:53:19,344 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 20:53:19,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 20:53:19,344 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 20:53:19,344 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 20:53:19,344 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 20:53:19,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-31 20:53:19,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 20:53:19,345 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 20:53:19,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 20:53:19,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 20:53:19,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 20:53:19,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 20:53:19,392 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 20:53:19,393 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 20:53:19,582 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 20:53:19,608 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 20:53:19,608 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-03-31 20:53:19,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 08:53:19 BoogieIcfgContainer [2023-03-31 20:53:19,610 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 20:53:19,612 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 20:53:19,612 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 20:53:19,614 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 20:53:19,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 08:53:19" (1/3) ... [2023-03-31 20:53:19,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@731f37b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 08:53:19, skipping insertion in model container [2023-03-31 20:53:19,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:53:19" (2/3) ... [2023-03-31 20:53:19,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@731f37b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 08:53:19, skipping insertion in model container [2023-03-31 20:53:19,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 08:53:19" (3/3) ... [2023-03-31 20:53:19,616 INFO L112 eAbstractionObserver]: Analyzing ICFG transpose-u.c [2023-03-31 20:53:19,628 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 20:53:19,628 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 20:53:19,659 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 20:53:19,664 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;@1f65bb6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 20:53:19,665 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 20:53:19,667 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 20:53:19,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-03-31 20:53:19,673 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:53:19,673 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:53:19,673 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:53:19,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:53:19,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1635794285, now seen corresponding path program 1 times [2023-03-31 20:53:19,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:53:19,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310446986] [2023-03-31 20:53:19,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:53:19,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:53:19,774 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:53:19,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [402725301] [2023-03-31 20:53:19,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:53:19,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:53:19,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:53:19,795 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) [2023-03-31 20:53:19,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 20:53:19,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:53:19,901 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-31 20:53:19,905 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:53:19,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:53:19,976 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 20:53:19,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:53:19,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310446986] [2023-03-31 20:53:19,977 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:53:19,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402725301] [2023-03-31 20:53:19,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402725301] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 20:53:19,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 20:53:19,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 20:53:19,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386917077] [2023-03-31 20:53:19,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 20:53:19,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 20:53:19,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:53:20,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 20:53:20,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 20:53:20,023 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:53:20,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:53:20,088 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2023-03-31 20:53:20,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 20:53:20,091 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-03-31 20:53:20,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:53:20,096 INFO L225 Difference]: With dead ends: 39 [2023-03-31 20:53:20,096 INFO L226 Difference]: Without dead ends: 21 [2023-03-31 20:53:20,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 20:53:20,103 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:53:20,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 29 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:53:20,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-03-31 20:53:20,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2023-03-31 20:53:20,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 20:53:20,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2023-03-31 20:53:20,131 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 13 [2023-03-31 20:53:20,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:53:20,131 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2023-03-31 20:53:20,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:53:20,131 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2023-03-31 20:53:20,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-03-31 20:53:20,132 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:53:20,132 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:53:20,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 20:53:20,337 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 [2023-03-31 20:53:20,337 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:53:20,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:53:20,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1210576451, now seen corresponding path program 1 times [2023-03-31 20:53:20,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:53:20,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871555850] [2023-03-31 20:53:20,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:53:20,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:53:20,350 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:53:20,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1410388335] [2023-03-31 20:53:20,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:53:20,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:53:20,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:53:20,369 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) [2023-03-31 20:53:20,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 20:53:20,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:53:20,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-31 20:53:20,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:53:20,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:53:20,457 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 20:53:20,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:53:20,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871555850] [2023-03-31 20:53:20,457 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:53:20,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410388335] [2023-03-31 20:53:20,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410388335] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 20:53:20,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 20:53:20,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 20:53:20,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133611390] [2023-03-31 20:53:20,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 20:53:20,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 20:53:20,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:53:20,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 20:53:20,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-03-31 20:53:20,459 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:53:20,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:53:20,504 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2023-03-31 20:53:20,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 20:53:20,505 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-03-31 20:53:20,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:53:20,506 INFO L225 Difference]: With dead ends: 41 [2023-03-31 20:53:20,506 INFO L226 Difference]: Without dead ends: 27 [2023-03-31 20:53:20,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-03-31 20:53:20,507 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 13 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:53:20,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 29 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:53:20,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-03-31 20:53:20,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2023-03-31 20:53:20,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 20:53:20,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2023-03-31 20:53:20,514 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 15 [2023-03-31 20:53:20,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:53:20,514 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2023-03-31 20:53:20,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:53:20,515 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2023-03-31 20:53:20,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-03-31 20:53:20,515 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:53:20,515 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:53:20,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 20:53:20,720 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 [2023-03-31 20:53:20,720 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:53:20,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:53:20,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1502890045, now seen corresponding path program 1 times [2023-03-31 20:53:20,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:53:20,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292124539] [2023-03-31 20:53:20,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:53:20,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:53:20,732 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:53:20,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1632925239] [2023-03-31 20:53:20,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:53:20,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:53:20,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:53:20,736 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) [2023-03-31 20:53:20,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 20:53:20,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:53:20,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 20:53:20,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:53:20,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:53:20,831 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:53:20,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:53:20,863 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:53:20,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292124539] [2023-03-31 20:53:20,863 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:53:20,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632925239] [2023-03-31 20:53:20,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632925239] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:53:20,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [150550062] [2023-03-31 20:53:20,877 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-03-31 20:53:20,877 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:53:20,880 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:53:20,883 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:53:20,884 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:53:20,936 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:53:21,090 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:53:21,095 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:53:21,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [150550062] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 20:53:21,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-31 20:53:21,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5, 5] total 16 [2023-03-31 20:53:21,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188936799] [2023-03-31 20:53:21,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 20:53:21,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-03-31 20:53:21,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:53:21,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-03-31 20:53:21,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-03-31 20:53:21,254 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 10 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:53:21,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:53:21,670 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2023-03-31 20:53:21,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-03-31 20:53:21,671 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-03-31 20:53:21,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:53:21,671 INFO L225 Difference]: With dead ends: 38 [2023-03-31 20:53:21,672 INFO L226 Difference]: Without dead ends: 26 [2023-03-31 20:53:21,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2023-03-31 20:53:21,673 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 60 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:53:21,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 8 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:53:21,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-03-31 20:53:21,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2023-03-31 20:53:21,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 20:53:21,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2023-03-31 20:53:21,681 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 16 [2023-03-31 20:53:21,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:53:21,681 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2023-03-31 20:53:21,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:53:21,682 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2023-03-31 20:53:21,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-03-31 20:53:21,682 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:53:21,682 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:53:21,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 20:53:21,888 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 [2023-03-31 20:53:21,888 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:53:21,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:53:21,889 INFO L85 PathProgramCache]: Analyzing trace with hash -236855134, now seen corresponding path program 1 times [2023-03-31 20:53:21,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:53:21,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544002637] [2023-03-31 20:53:21,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:53:21,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:53:21,915 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:53:21,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1152825154] [2023-03-31 20:53:21,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:53:21,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:53:21,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:53:21,925 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) [2023-03-31 20:53:21,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 20:53:22,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:53:22,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 20:53:22,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:53:22,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 20:53:22,039 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:53:22,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 20:53:22,085 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:53:22,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544002637] [2023-03-31 20:53:22,086 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:53:22,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152825154] [2023-03-31 20:53:22,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152825154] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:53:22,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1660757695] [2023-03-31 20:53:22,094 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-03-31 20:53:22,095 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:53:22,095 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:53:22,095 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:53:22,095 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:53:22,146 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:53:22,433 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2023-03-31 20:53:22,441 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:53:22,447 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:53:22,701 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '657#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#C~0.base_BEFORE_CALL_1| Int) (|v_main_~#A~0.base_BEFORE_CALL_1| Int) (|v_main_~#C~0.offset_BEFORE_CALL_1| Int) (|v_main_~#A~0.offset_BEFORE_CALL_1| Int)) (not (= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_1|) |v_main_~#A~0.offset_BEFORE_CALL_1|) (select (select |#memory_int| |v_main_~#C~0.base_BEFORE_CALL_1|) |v_main_~#C~0.offset_BEFORE_CALL_1|)))))' at error location [2023-03-31 20:53:22,701 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:53:22,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 20:53:22,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-03-31 20:53:22,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059951355] [2023-03-31 20:53:22,702 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 20:53:22,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-31 20:53:22,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:53:22,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-31 20:53:22,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2023-03-31 20:53:22,703 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:53:22,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:53:22,789 INFO L93 Difference]: Finished difference Result 57 states and 79 transitions. [2023-03-31 20:53:22,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 20:53:22,790 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-03-31 20:53:22,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:53:22,790 INFO L225 Difference]: With dead ends: 57 [2023-03-31 20:53:22,790 INFO L226 Difference]: Without dead ends: 39 [2023-03-31 20:53:22,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2023-03-31 20:53:22,792 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 35 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:53:22,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 38 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:53:22,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-03-31 20:53:22,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-03-31 20:53:22,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 20:53:22,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2023-03-31 20:53:22,802 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 19 [2023-03-31 20:53:22,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:53:22,802 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2023-03-31 20:53:22,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:53:22,803 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2023-03-31 20:53:22,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-03-31 20:53:22,804 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:53:22,804 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:53:22,827 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-03-31 20:53:23,008 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 [2023-03-31 20:53:23,009 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:53:23,009 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:53:23,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1511690632, now seen corresponding path program 2 times [2023-03-31 20:53:23,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:53:23,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286001799] [2023-03-31 20:53:23,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:53:23,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:53:23,034 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:53:23,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1814645484] [2023-03-31 20:53:23,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 20:53:23,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:53:23,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:53:23,053 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) [2023-03-31 20:53:23,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 20:53:23,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-03-31 20:53:23,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:53:23,127 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 20:53:23,128 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:53:23,162 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-03-31 20:53:23,162 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:53:23,191 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-03-31 20:53:23,191 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:53:23,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286001799] [2023-03-31 20:53:23,191 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:53:23,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814645484] [2023-03-31 20:53:23,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814645484] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:53:23,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1844127712] [2023-03-31 20:53:23,193 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-03-31 20:53:23,193 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:53:23,193 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:53:23,194 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:53:23,194 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:53:23,211 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:53:23,358 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2023-03-31 20:53:23,364 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:53:23,367 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:53:23,617 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '996#(and (exists ((|v_main_~#C~0.base_BEFORE_CALL_2| Int) (|v_main_~#C~0.offset_BEFORE_CALL_2| Int) (|v_main_~#A~0.offset_BEFORE_CALL_2| Int) (|v_main_~#A~0.base_BEFORE_CALL_2| Int)) (not (= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_2|) |v_main_~#A~0.offset_BEFORE_CALL_2|) (select (select |#memory_int| |v_main_~#C~0.base_BEFORE_CALL_2|) |v_main_~#C~0.offset_BEFORE_CALL_2|)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 20:53:23,617 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:53:23,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 20:53:23,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-03-31 20:53:23,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053666341] [2023-03-31 20:53:23,618 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 20:53:23,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-31 20:53:23,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:53:23,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-31 20:53:23,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2023-03-31 20:53:23,620 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:53:23,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:53:23,739 INFO L93 Difference]: Finished difference Result 145 states and 186 transitions. [2023-03-31 20:53:23,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 20:53:23,739 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-03-31 20:53:23,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:53:23,740 INFO L225 Difference]: With dead ends: 145 [2023-03-31 20:53:23,740 INFO L226 Difference]: Without dead ends: 118 [2023-03-31 20:53:23,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2023-03-31 20:53:23,741 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 70 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:53:23,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 38 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:53:23,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-03-31 20:53:23,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 75. [2023-03-31 20:53:23,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 states have internal predecessors, (78), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 20:53:23,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 89 transitions. [2023-03-31 20:53:23,760 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 89 transitions. Word has length 25 [2023-03-31 20:53:23,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:53:23,760 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 89 transitions. [2023-03-31 20:53:23,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:53:23,760 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 89 transitions. [2023-03-31 20:53:23,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-03-31 20:53:23,761 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:53:23,761 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:53:23,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-03-31 20:53:23,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:53:23,967 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:53:23,967 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:53:23,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1765309529, now seen corresponding path program 3 times [2023-03-31 20:53:23,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:53:23,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032100446] [2023-03-31 20:53:23,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:53:23,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:53:23,991 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:53:23,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1531073919] [2023-03-31 20:53:23,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 20:53:23,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:53:23,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:53:24,014 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:53:24,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-31 20:53:38,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 20:53:38,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:53:38,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-31 20:53:38,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:53:38,620 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 160 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2023-03-31 20:53:38,620 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:53:38,738 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 160 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2023-03-31 20:53:38,738 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:53:38,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032100446] [2023-03-31 20:53:38,738 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:53:38,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531073919] [2023-03-31 20:53:38,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531073919] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:53:38,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1723255362] [2023-03-31 20:53:38,740 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-03-31 20:53:38,741 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:53:38,741 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:53:38,741 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:53:38,741 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:53:38,757 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:53:38,875 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2023-03-31 20:53:38,881 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:53:38,893 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:53:39,116 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1788#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#C~0.base_BEFORE_CALL_3| Int) (|v_main_~#C~0.offset_BEFORE_CALL_3| Int) (|v_main_~#A~0.base_BEFORE_CALL_3| Int) (|v_main_~#A~0.offset_BEFORE_CALL_3| Int)) (not (= (select (select |#memory_int| |v_main_~#C~0.base_BEFORE_CALL_3|) |v_main_~#C~0.offset_BEFORE_CALL_3|) (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_3|) |v_main_~#A~0.offset_BEFORE_CALL_3|)))))' at error location [2023-03-31 20:53:39,117 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:53:39,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 20:53:39,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-03-31 20:53:39,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752358516] [2023-03-31 20:53:39,117 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 20:53:39,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-31 20:53:39,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:53:39,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-31 20:53:39,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2023-03-31 20:53:39,118 INFO L87 Difference]: Start difference. First operand 75 states and 89 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:53:39,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:53:39,198 INFO L93 Difference]: Finished difference Result 156 states and 191 transitions. [2023-03-31 20:53:39,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-03-31 20:53:39,199 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2023-03-31 20:53:39,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:53:39,199 INFO L225 Difference]: With dead ends: 156 [2023-03-31 20:53:39,199 INFO L226 Difference]: Without dead ends: 111 [2023-03-31 20:53:39,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2023-03-31 20:53:39,200 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:53:39,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 31 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:53:39,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-03-31 20:53:39,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2023-03-31 20:53:39,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 20:53:39,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 131 transitions. [2023-03-31 20:53:39,220 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 131 transitions. Word has length 61 [2023-03-31 20:53:39,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:53:39,220 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 131 transitions. [2023-03-31 20:53:39,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:53:39,221 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 131 transitions. [2023-03-31 20:53:39,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-03-31 20:53:39,222 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:53:39,222 INFO L195 NwaCegarLoop]: trace histogram [40, 16, 10, 10, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:53:39,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-31 20:53:39,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:53:39,435 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:53:39,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:53:39,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1718483769, now seen corresponding path program 4 times [2023-03-31 20:53:39,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:53:39,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882304199] [2023-03-31 20:53:39,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:53:39,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:53:39,476 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:53:39,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [812356555] [2023-03-31 20:53:39,476 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 20:53:39,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:53:39,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:53:39,479 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:53:39,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-31 20:53:39,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:53:39,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-31 20:53:39,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:53:39,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1480 backedges. 235 proven. 10 refuted. 0 times theorem prover too weak. 1235 trivial. 0 not checked. [2023-03-31 20:53:39,665 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:53:39,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1480 backedges. 235 proven. 10 refuted. 0 times theorem prover too weak. 1235 trivial. 0 not checked. [2023-03-31 20:53:39,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:53:39,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882304199] [2023-03-31 20:53:39,707 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:53:39,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812356555] [2023-03-31 20:53:39,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812356555] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:53:39,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [246383066] [2023-03-31 20:53:39,709 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-03-31 20:53:39,709 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:53:39,709 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:53:39,709 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:53:39,709 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:53:39,720 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:53:39,818 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2023-03-31 20:53:39,822 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:53:39,825 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:53:40,022 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2900#(and (exists ((|v_main_~#C~0.offset_BEFORE_CALL_4| Int) (|v_main_~#A~0.base_BEFORE_CALL_4| Int) (|v_main_~#A~0.offset_BEFORE_CALL_4| Int) (|v_main_~#C~0.base_BEFORE_CALL_4| Int)) (not (= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_4|) |v_main_~#A~0.offset_BEFORE_CALL_4|) (select (select |#memory_int| |v_main_~#C~0.base_BEFORE_CALL_4|) |v_main_~#C~0.offset_BEFORE_CALL_4|)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 20:53:40,022 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:53:40,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 20:53:40,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-03-31 20:53:40,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026631593] [2023-03-31 20:53:40,023 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 20:53:40,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-03-31 20:53:40,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:53:40,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-03-31 20:53:40,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2023-03-31 20:53:40,024 INFO L87 Difference]: Start difference. First operand 111 states and 131 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:53:40,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:53:40,203 INFO L93 Difference]: Finished difference Result 313 states and 448 transitions. [2023-03-31 20:53:40,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-31 20:53:40,203 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2023-03-31 20:53:40,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:53:40,204 INFO L225 Difference]: With dead ends: 313 [2023-03-31 20:53:40,204 INFO L226 Difference]: Without dead ends: 213 [2023-03-31 20:53:40,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=206, Invalid=850, Unknown=0, NotChecked=0, Total=1056 [2023-03-31 20:53:40,206 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 74 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:53:40,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 47 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:53:40,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-03-31 20:53:40,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2023-03-31 20:53:40,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 198 states have (on average 1.0909090909090908) internal successors, (216), 198 states have internal predecessors, (216), 12 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-03-31 20:53:40,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 239 transitions. [2023-03-31 20:53:40,231 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 239 transitions. Word has length 97 [2023-03-31 20:53:40,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:53:40,231 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 239 transitions. [2023-03-31 20:53:40,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:53:40,231 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 239 transitions. [2023-03-31 20:53:40,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2023-03-31 20:53:40,232 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:53:40,232 INFO L195 NwaCegarLoop]: trace histogram [100, 40, 10, 10, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:53:40,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-03-31 20:53:40,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:53:40,439 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:53:40,439 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:53:40,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1829460423, now seen corresponding path program 5 times [2023-03-31 20:53:40,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:53:40,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790080340] [2023-03-31 20:53:40,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:53:40,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:53:40,485 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:53:40,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [856270425] [2023-03-31 20:53:40,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 20:53:40,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:53:40,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:53:40,486 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:53:40,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process