/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 EqDomain -i ../sv-benchmarks/c/bitvector/gcd_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 09:10:00,521 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 09:10:00,523 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 09:10:00,562 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 09:10:00,563 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 09:10:00,566 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 09:10:00,569 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 09:10:00,571 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 09:10:00,573 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 09:10:00,577 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 09:10:00,579 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 09:10:00,580 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 09:10:00,580 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 09:10:00,583 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 09:10:00,585 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 09:10:00,586 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 09:10:00,587 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 09:10:00,587 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 09:10:00,589 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 09:10:00,594 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 09:10:00,595 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 09:10:00,597 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 09:10:00,598 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 09:10:00,599 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 09:10:00,608 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 09:10:00,608 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 09:10:00,608 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 09:10:00,610 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 09:10:00,610 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 09:10:00,611 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 09:10:00,611 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 09:10:00,611 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 09:10:00,613 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 09:10:00,613 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 09:10:00,614 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 09:10:00,614 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 09:10:00,614 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 09:10:00,614 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 09:10:00,614 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 09:10:00,615 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 09:10:00,616 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 09:10:00,617 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 09:10:00,647 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 09:10:00,647 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 09:10:00,647 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 09:10:00,648 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 09:10:00,648 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 09:10:00,649 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 09:10:00,649 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 09:10:00,649 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 09:10:00,649 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 09:10:00,649 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 09:10:00,650 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 09:10:00,650 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 09:10:00,650 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 09:10:00,650 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 09:10:00,650 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 09:10:00,650 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 09:10:00,651 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 09:10:00,651 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 09:10:00,651 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 09:10:00,651 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 09:10:00,651 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 09:10:00,652 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 09:10:00,652 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 09:10:00,652 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 09:10:00,652 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 09:10:00,652 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 09:10:00,653 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 09:10:00,653 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 09:10:00,653 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 09:10:00,653 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 09:10:00,653 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 09:10:00,653 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 09:10:00,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:10:00,654 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 09:10:00,654 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 09:10:00,654 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 09:10:00,654 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 09:10:00,654 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 09:10:00,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 09:10:00,654 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 09:10:00,654 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 09:10:00,655 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 09:10:00,896 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 09:10:00,916 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 09:10:00,918 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 09:10:00,920 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 09:10:00,920 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 09:10:00,922 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/gcd_1.c [2023-04-01 09:10:02,069 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 09:10:02,238 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 09:10:02,238 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/gcd_1.c [2023-04-01 09:10:02,243 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b28118666/9a77631861334c288b876544f487d0f5/FLAG09074d2cb [2023-04-01 09:10:02,255 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b28118666/9a77631861334c288b876544f487d0f5 [2023-04-01 09:10:02,257 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 09:10:02,259 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 09:10:02,260 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 09:10:02,260 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 09:10:02,263 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 09:10:02,263 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:10:02" (1/1) ... [2023-04-01 09:10:02,264 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ab2ba84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:10:02, skipping insertion in model container [2023-04-01 09:10:02,264 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:10:02" (1/1) ... [2023-04-01 09:10:02,275 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 09:10:02,291 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 09:10:02,400 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/gcd_1.c[664,677] [2023-04-01 09:10:02,417 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:10:02,431 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 09:10:02,445 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/gcd_1.c[664,677] [2023-04-01 09:10:02,453 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:10:02,465 INFO L208 MainTranslator]: Completed translation [2023-04-01 09:10:02,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:10:02 WrapperNode [2023-04-01 09:10:02,465 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 09:10:02,466 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 09:10:02,466 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 09:10:02,467 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 09:10:02,477 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:10:02" (1/1) ... [2023-04-01 09:10:02,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:10:02" (1/1) ... [2023-04-01 09:10:02,483 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:10:02" (1/1) ... [2023-04-01 09:10:02,483 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:10:02" (1/1) ... [2023-04-01 09:10:02,495 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:10:02" (1/1) ... [2023-04-01 09:10:02,499 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:10:02" (1/1) ... [2023-04-01 09:10:02,506 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:10:02" (1/1) ... [2023-04-01 09:10:02,507 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:10:02" (1/1) ... [2023-04-01 09:10:02,509 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 09:10:02,510 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 09:10:02,511 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 09:10:02,511 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 09:10:02,512 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:10:02" (1/1) ... [2023-04-01 09:10:02,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:10:02,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:10:02,542 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 09:10:02,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 09:10:02,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 09:10:02,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 09:10:02,586 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 09:10:02,586 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 09:10:02,586 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd_test [2023-04-01 09:10:02,586 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 09:10:02,586 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 09:10:02,587 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 09:10:02,587 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 09:10:02,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 09:10:02,589 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 09:10:02,589 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 09:10:02,589 INFO L130 BoogieDeclarations]: Found specification of procedure gcd_test [2023-04-01 09:10:02,589 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 09:10:02,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 09:10:02,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 09:10:02,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 09:10:02,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 09:10:02,589 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 09:10:02,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 09:10:02,652 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 09:10:02,654 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 09:10:02,769 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 09:10:02,825 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 09:10:02,825 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 09:10:02,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:10:02 BoogieIcfgContainer [2023-04-01 09:10:02,828 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 09:10:02,830 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 09:10:02,830 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 09:10:02,833 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 09:10:02,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 09:10:02" (1/3) ... [2023-04-01 09:10:02,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4033de5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:10:02, skipping insertion in model container [2023-04-01 09:10:02,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:10:02" (2/3) ... [2023-04-01 09:10:02,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4033de5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:10:02, skipping insertion in model container [2023-04-01 09:10:02,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:10:02" (3/3) ... [2023-04-01 09:10:02,836 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_1.c [2023-04-01 09:10:02,855 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 09:10:02,856 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 09:10:02,908 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 09:10:02,915 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;@1870023c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 09:10:02,915 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 09:10:02,920 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 14 states have internal predecessors, (16), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 09:10:02,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-01 09:10:02,926 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:10:02,927 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:10:02,927 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:10:02,931 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:10:02,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1771729486, now seen corresponding path program 1 times [2023-04-01 09:10:02,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:10:02,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961690278] [2023-04-01 09:10:02,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:10:02,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:10:03,012 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:10:03,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [140687069] [2023-04-01 09:10:03,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:10:03,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:10:03,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:10:03,021 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:10:03,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 09:10:03,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:10:03,090 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 09:10:03,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:10:03,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:10:03,312 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 09:10:03,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:10:03,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961690278] [2023-04-01 09:10:03,313 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:10:03,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140687069] [2023-04-01 09:10:03,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140687069] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:10:03,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:10:03,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:10:03,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522458447] [2023-04-01 09:10:03,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:10:03,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:10:03,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:10:03,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:10:03,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:10:03,346 INFO L87 Difference]: Start difference. First operand has 22 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 14 states have internal predecessors, (16), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 3 states have (on average 3.0) internal successors, (9), 5 states have internal predecessors, (9), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:10:03,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:10:03,540 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2023-04-01 09:10:03,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 09:10:03,543 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 3.0) internal successors, (9), 5 states have internal predecessors, (9), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2023-04-01 09:10:03,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:10:03,549 INFO L225 Difference]: With dead ends: 38 [2023-04-01 09:10:03,549 INFO L226 Difference]: Without dead ends: 17 [2023-04-01 09:10:03,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 09:10:03,558 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:10:03,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 64 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:10:03,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-04-01 09:10:03,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-04-01 09:10:03,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:10:03,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2023-04-01 09:10:03,597 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2023-04-01 09:10:03,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:10:03,598 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2023-04-01 09:10:03,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 3.0) internal successors, (9), 5 states have internal predecessors, (9), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:10:03,598 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2023-04-01 09:10:03,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-01 09:10:03,599 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:10:03,599 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:10:03,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 09:10:03,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-01 09:10:03,806 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:10:03,806 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:10:03,807 INFO L85 PathProgramCache]: Analyzing trace with hash 452655322, now seen corresponding path program 1 times [2023-04-01 09:10:03,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:10:03,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436166044] [2023-04-01 09:10:03,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:10:03,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:10:03,821 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:10:03,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1544842765] [2023-04-01 09:10:03,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:10:03,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:10:03,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:10:03,827 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:10:03,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 09:10:03,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:10:03,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 20 conjunts are in the unsatisfiable core [2023-04-01 09:10:03,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:10:04,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:10:04,214 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:10:04,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:10:04,595 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:10:04,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436166044] [2023-04-01 09:10:04,600 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:10:04,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544842765] [2023-04-01 09:10:04,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544842765] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:10:04,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1792125631] [2023-04-01 09:10:04,639 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 09:10:04,639 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:10:04,642 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:10:04,647 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:10:04,647 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:10:04,854 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 76 for LOIs [2023-04-01 09:10:06,405 INFO L197 IcfgInterpreter]: Interpreting procedure gcd_test with input of size 97 for LOIs [2023-04-01 09:10:07,479 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 100 for LOIs [2023-04-01 09:10:07,549 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 09:10:07,557 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:10:09,572 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '262#(and (= (select (select |#memory_int| 2) 4) 49) (= (select (select |#memory_int| 2) 7) 0) (= (select |#length| 3) 12) (= (select (select |#memory_int| 2) 6) 99) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= (select (select |#memory_int| 2) 1) 99) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 1) 1) (= (select (select |#memory_int| 2) 2) 100) (= (select |#valid| 0) 0) (= (select (select |#memory_int| 2) 5) 46) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= 8 (select |#length| 2)) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (= (select (select |#memory_int| 2) 0) 103) (= 95 (select (select |#memory_int| 2) 3)) (= |#NULL.base| 0))' at error location [2023-04-01 09:10:09,572 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:10:09,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:10:09,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2023-04-01 09:10:09,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375777045] [2023-04-01 09:10:09,573 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:10:09,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 09:10:09,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:10:09,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 09:10:09,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2023-04-01 09:10:09,576 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 18 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 14 states have internal predecessors, (17), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 09:10:09,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:10:09,740 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2023-04-01 09:10:09,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 09:10:09,744 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 14 states have internal predecessors, (17), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 16 [2023-04-01 09:10:09,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:10:09,745 INFO L225 Difference]: With dead ends: 25 [2023-04-01 09:10:09,745 INFO L226 Difference]: Without dead ends: 18 [2023-04-01 09:10:09,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 09:10:09,746 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 3 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:10:09,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 90 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:10:09,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-04-01 09:10:09,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-04-01 09:10:09,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:10:09,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2023-04-01 09:10:09,751 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2023-04-01 09:10:09,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:10:09,751 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2023-04-01 09:10:09,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 14 states have internal predecessors, (17), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 09:10:09,752 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2023-04-01 09:10:09,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-01 09:10:09,752 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:10:09,752 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:10:09,760 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-01 09:10:09,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-04-01 09:10:09,960 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:10:09,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:10:09,961 INFO L85 PathProgramCache]: Analyzing trace with hash 689107634, now seen corresponding path program 2 times [2023-04-01 09:10:09,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:10:09,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354912883] [2023-04-01 09:10:09,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:10:09,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:10:09,977 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:10:09,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [547665028] [2023-04-01 09:10:09,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 09:10:09,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:10:09,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:10:09,980 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:10:09,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 09:10:20,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 09:10:20,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:10:20,832 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 44 conjunts are in the unsatisfiable core [2023-04-01 09:10:20,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:10:37,284 WARN L223 SmtUtils]: Spent 15.72s on a formula simplification. DAG size of input: 74 DAG size of output: 73 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)