/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_2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 09:10:04,137 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 09:10:04,138 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 09:10:04,156 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 09:10:04,156 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 09:10:04,157 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 09:10:04,158 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 09:10:04,159 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 09:10:04,161 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 09:10:04,161 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 09:10:04,162 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 09:10:04,163 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 09:10:04,163 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 09:10:04,163 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 09:10:04,164 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 09:10:04,165 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 09:10:04,166 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 09:10:04,166 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 09:10:04,168 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 09:10:04,169 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 09:10:04,170 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 09:10:04,171 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 09:10:04,172 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 09:10:04,173 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 09:10:04,175 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 09:10:04,176 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 09:10:04,176 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 09:10:04,176 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 09:10:04,177 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 09:10:04,177 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 09:10:04,178 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 09:10:04,178 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 09:10:04,179 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 09:10:04,179 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 09:10:04,180 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 09:10:04,180 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 09:10:04,180 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 09:10:04,181 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 09:10:04,181 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 09:10:04,181 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 09:10:04,182 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 09:10:04,182 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 09:10:04,198 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 09:10:04,199 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 09:10:04,199 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 09:10:04,199 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 09:10:04,200 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 09:10:04,200 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 09:10:04,200 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 09:10:04,200 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 09:10:04,200 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 09:10:04,200 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 09:10:04,200 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 09:10:04,201 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 09:10:04,201 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 09:10:04,201 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 09:10:04,201 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 09:10:04,201 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 09:10:04,201 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 09:10:04,201 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 09:10:04,202 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 09:10:04,202 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 09:10:04,202 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 09:10:04,202 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 09:10:04,202 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 09:10:04,203 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 09:10:04,203 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 09:10:04,203 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 09:10:04,203 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 09:10:04,203 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 09:10:04,203 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 09:10:04,203 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 09:10:04,204 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 09:10:04,204 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 09:10:04,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:10:04,204 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 09:10:04,204 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 09:10:04,204 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 09:10:04,204 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 09:10:04,205 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 09:10:04,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 09:10:04,205 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 09:10:04,205 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 09:10:04,205 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 09:10:04,349 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 09:10:04,367 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 09:10:04,370 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 09:10:04,371 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 09:10:04,372 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 09:10:04,373 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/gcd_2.c [2023-04-01 09:10:05,437 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 09:10:05,622 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 09:10:05,622 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/gcd_2.c [2023-04-01 09:10:05,626 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/210231d8b/e9c20cedeff449158a8a82180e2a36a1/FLAG1371f18ac [2023-04-01 09:10:05,637 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/210231d8b/e9c20cedeff449158a8a82180e2a36a1 [2023-04-01 09:10:05,638 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 09:10:05,639 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 09:10:05,640 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 09:10:05,640 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 09:10:05,642 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 09:10:05,643 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:10:05" (1/1) ... [2023-04-01 09:10:05,643 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d32b7e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:10:05, skipping insertion in model container [2023-04-01 09:10:05,644 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:10:05" (1/1) ... [2023-04-01 09:10:05,648 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 09:10:05,662 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 09:10:05,783 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_2.c[664,677] [2023-04-01 09:10:05,797 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:10:05,805 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 09:10:05,814 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_2.c[664,677] [2023-04-01 09:10:05,820 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:10:05,830 INFO L208 MainTranslator]: Completed translation [2023-04-01 09:10:05,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:10:05 WrapperNode [2023-04-01 09:10:05,830 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 09:10:05,831 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 09:10:05,831 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 09:10:05,831 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 09:10:05,844 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:10:05" (1/1) ... [2023-04-01 09:10:05,844 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:10:05" (1/1) ... [2023-04-01 09:10:05,849 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:10:05" (1/1) ... [2023-04-01 09:10:05,849 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:10:05" (1/1) ... [2023-04-01 09:10:05,852 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:10:05" (1/1) ... [2023-04-01 09:10:05,854 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:10:05" (1/1) ... [2023-04-01 09:10:05,855 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:10:05" (1/1) ... [2023-04-01 09:10:05,855 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:10:05" (1/1) ... [2023-04-01 09:10:05,856 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 09:10:05,857 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 09:10:05,857 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 09:10:05,857 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 09:10:05,858 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:10:05" (1/1) ... [2023-04-01 09:10:05,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:10:05,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:10:05,879 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 09:10:05,896 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 09:10:05,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 09:10:05,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 09:10:05,907 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 09:10:05,907 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 09:10:05,908 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd_test [2023-04-01 09:10:05,908 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 09:10:05,908 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 09:10:05,908 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 09:10:05,908 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 09:10:05,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 09:10:05,908 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 09:10:05,908 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 09:10:05,908 INFO L130 BoogieDeclarations]: Found specification of procedure gcd_test [2023-04-01 09:10:05,908 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 09:10:05,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 09:10:05,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 09:10:05,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 09:10:05,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 09:10:05,909 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 09:10:05,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 09:10:05,955 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 09:10:05,957 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 09:10:06,058 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 09:10:06,107 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 09:10:06,107 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 09:10:06,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:10:06 BoogieIcfgContainer [2023-04-01 09:10:06,109 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 09:10:06,111 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 09:10:06,111 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 09:10:06,113 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 09:10:06,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 09:10:05" (1/3) ... [2023-04-01 09:10:06,114 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b718f27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:10:06, skipping insertion in model container [2023-04-01 09:10:06,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:10:05" (2/3) ... [2023-04-01 09:10:06,114 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b718f27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:10:06, skipping insertion in model container [2023-04-01 09:10:06,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:10:06" (3/3) ... [2023-04-01 09:10:06,115 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_2.c [2023-04-01 09:10:06,128 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 09:10:06,128 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 09:10:06,175 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 09:10:06,179 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;@2de5527a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 09:10:06,179 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 09:10:06,183 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 09:10:06,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-01 09:10:06,191 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:10:06,192 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:10:06,192 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:10:06,195 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:10:06,196 INFO L85 PathProgramCache]: Analyzing trace with hash -674425829, now seen corresponding path program 1 times [2023-04-01 09:10:06,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:10:06,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110180618] [2023-04-01 09:10:06,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:10:06,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:10:06,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:10:06,518 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 09:10:06,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:10:06,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110180618] [2023-04-01 09:10:06,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110180618] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:10:06,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:10:06,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:10:06,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679080939] [2023-04-01 09:10:06,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:10:06,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:10:06,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:10:06,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:10:06,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:10:06,546 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, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:10:06,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:10:06,624 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2023-04-01 09:10:06,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 09:10:06,626 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2023-04-01 09:10:06,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:10:06,631 INFO L225 Difference]: With dead ends: 39 [2023-04-01 09:10:06,631 INFO L226 Difference]: Without dead ends: 17 [2023-04-01 09:10:06,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 09:10:06,636 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 3 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 09:10:06,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 59 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 09:10:06,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-04-01 09:10:06,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-04-01 09:10:06,659 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 09:10:06,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2023-04-01 09:10:06,661 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2023-04-01 09:10:06,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:10:06,662 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2023-04-01 09:10:06,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:10:06,663 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2023-04-01 09:10:06,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-01 09:10:06,663 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:10:06,663 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:10:06,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 09:10:06,664 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:10:06,664 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:10:06,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1095056007, now seen corresponding path program 1 times [2023-04-01 09:10:06,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:10:06,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140719689] [2023-04-01 09:10:06,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:10:06,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:10:06,678 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:10:06,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1265374255] [2023-04-01 09:10:06,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:10:06,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:10:06,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:10:06,699 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 09:10:06,700 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 09:10:06,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:10:06,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 15 conjunts are in the unsatisfiable core [2023-04-01 09:10:06,783 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:10:07,217 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 09:10:07,218 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:10:07,530 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 09:10:07,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:10:07,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140719689] [2023-04-01 09:10:07,531 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:10:07,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265374255] [2023-04-01 09:10:07,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265374255] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:10:07,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1397255843] [2023-04-01 09:10:07,585 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 09:10:07,586 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:10:07,599 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:10:07,604 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:10:07,604 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:10:07,770 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 76 for LOIs [2023-04-01 09:10:08,845 INFO L197 IcfgInterpreter]: Interpreting procedure gcd_test with input of size 86 for LOIs [2023-04-01 09:10:09,423 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 94 for LOIs [2023-04-01 09:10:09,458 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 09:10:09,466 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:10:10,689 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '221#(and (= (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) 4) 50) (= (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 09:10:10,689 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:10:10,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:10:10,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2023-04-01 09:10:10,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125502501] [2023-04-01 09:10:10,690 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:10:10,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 09:10:10,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:10:10,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 09:10:10,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2023-04-01 09:10:10,692 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 18 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 09:10:10,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:10:10,904 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2023-04-01 09:10:10,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 09:10:10,904 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 16 [2023-04-01 09:10:10,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:10:10,905 INFO L225 Difference]: With dead ends: 30 [2023-04-01 09:10:10,905 INFO L226 Difference]: Without dead ends: 19 [2023-04-01 09:10:10,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 09:10:10,908 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 4 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:10:10,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 84 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:10:10,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-04-01 09:10:10,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-04-01 09:10:10,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:10:10,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2023-04-01 09:10:10,914 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2023-04-01 09:10:10,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:10:10,914 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2023-04-01 09:10:10,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 09:10:10,914 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2023-04-01 09:10:10,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 09:10:10,916 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:10:10,916 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:10:10,923 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 09:10:11,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:10:11,121 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:10:11,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:10:11,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1748364871, now seen corresponding path program 2 times [2023-04-01 09:10:11,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:10:11,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691104439] [2023-04-01 09:10:11,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:10:11,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:10:11,135 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:10:11,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [16580040] [2023-04-01 09:10:11,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 09:10:11,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:10:11,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:10:11,136 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 09:10:11,138 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 09:10:11,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 09:10:11,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:10:11,214 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 29 conjunts are in the unsatisfiable core [2023-04-01 09:10:11,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:11:14,262 WARN L223 SmtUtils]: Spent 53.24s on a formula simplification. DAG size of input: 151 DAG size of output: 116 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)