/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/nla-digbench/egcd2-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 23:08:32,117 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 23:08:32,119 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 23:08:32,153 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 23:08:32,153 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 23:08:32,156 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 23:08:32,158 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 23:08:32,160 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 23:08:32,161 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 23:08:32,164 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 23:08:32,166 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 23:08:32,167 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 23:08:32,167 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 23:08:32,169 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 23:08:32,169 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 23:08:32,170 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 23:08:32,171 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 23:08:32,171 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 23:08:32,173 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 23:08:32,176 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 23:08:32,177 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 23:08:32,178 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 23:08:32,178 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 23:08:32,179 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 23:08:32,182 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 23:08:32,183 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 23:08:32,183 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 23:08:32,184 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 23:08:32,184 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 23:08:32,184 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 23:08:32,184 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 23:08:32,185 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 23:08:32,186 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 23:08:32,186 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 23:08:32,187 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 23:08:32,187 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 23:08:32,187 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 23:08:32,187 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 23:08:32,187 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 23:08:32,188 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 23:08:32,188 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 23:08:32,189 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-03-31 23:08:32,214 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 23:08:32,214 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 23:08:32,214 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 23:08:32,214 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 23:08:32,215 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 23:08:32,215 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 23:08:32,215 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 23:08:32,215 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 23:08:32,215 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 23:08:32,215 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 23:08:32,216 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 23:08:32,216 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 23:08:32,216 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 23:08:32,216 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 23:08:32,216 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 23:08:32,216 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 23:08:32,216 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 23:08:32,217 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 23:08:32,217 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 23:08:32,217 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 23:08:32,217 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 23:08:32,217 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 23:08:32,217 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 23:08:32,217 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 23:08:32,217 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 23:08:32,218 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 23:08:32,218 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 23:08:32,218 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 23:08:32,218 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 23:08:32,218 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 23:08:32,218 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 23:08:32,218 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 23:08:32,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:08:32,219 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 23:08:32,219 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 23:08:32,219 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 23:08:32,219 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 23:08:32,219 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 23:08:32,219 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 23:08:32,219 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 23:08:32,219 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 23:08:32,219 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 23:08:32,396 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 23:08:32,414 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 23:08:32,418 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 23:08:32,419 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 23:08:32,419 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 23:08:32,420 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/egcd2-ll.c [2023-03-31 23:08:33,471 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 23:08:33,620 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 23:08:33,620 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/egcd2-ll.c [2023-03-31 23:08:33,624 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6b18099b/56471793675348cd86ea4142e459e04b/FLAGc8e25e01f [2023-03-31 23:08:33,633 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6b18099b/56471793675348cd86ea4142e459e04b [2023-03-31 23:08:33,635 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 23:08:33,636 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 23:08:33,637 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 23:08:33,637 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 23:08:33,639 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 23:08:33,639 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:08:33" (1/1) ... [2023-03-31 23:08:33,640 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39ad5c12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:08:33, skipping insertion in model container [2023-03-31 23:08:33,640 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:08:33" (1/1) ... [2023-03-31 23:08:33,644 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 23:08:33,654 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 23:08:33,744 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/nla-digbench/egcd2-ll.c[490,503] [2023-03-31 23:08:33,758 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:08:33,766 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 23:08:33,775 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/nla-digbench/egcd2-ll.c[490,503] [2023-03-31 23:08:33,783 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:08:33,792 INFO L208 MainTranslator]: Completed translation [2023-03-31 23:08:33,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:08:33 WrapperNode [2023-03-31 23:08:33,793 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 23:08:33,793 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 23:08:33,793 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 23:08:33,793 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 23:08:33,801 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:08:33" (1/1) ... [2023-03-31 23:08:33,801 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:08:33" (1/1) ... [2023-03-31 23:08:33,804 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:08:33" (1/1) ... [2023-03-31 23:08:33,805 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:08:33" (1/1) ... [2023-03-31 23:08:33,808 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:08:33" (1/1) ... [2023-03-31 23:08:33,810 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:08:33" (1/1) ... [2023-03-31 23:08:33,810 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:08:33" (1/1) ... [2023-03-31 23:08:33,811 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:08:33" (1/1) ... [2023-03-31 23:08:33,812 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 23:08:33,813 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 23:08:33,813 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 23:08:33,813 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 23:08:33,813 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:08:33" (1/1) ... [2023-03-31 23:08:33,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:08:33,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:08:33,844 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 23:08:33,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 23:08:33,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 23:08:33,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 23:08:33,873 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 23:08:33,876 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-31 23:08:33,876 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 23:08:33,876 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 23:08:33,876 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 23:08:33,876 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 23:08:33,877 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 23:08:33,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 23:08:33,877 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 23:08:33,877 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-31 23:08:33,877 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 23:08:33,877 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 23:08:33,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 23:08:33,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 23:08:33,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 23:08:33,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 23:08:33,877 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 23:08:33,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 23:08:33,933 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 23:08:33,934 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 23:08:34,062 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 23:08:34,079 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 23:08:34,079 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-03-31 23:08:34,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:08:34 BoogieIcfgContainer [2023-03-31 23:08:34,081 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 23:08:34,082 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 23:08:34,082 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 23:08:34,084 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 23:08:34,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 11:08:33" (1/3) ... [2023-03-31 23:08:34,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@380c81f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:08:34, skipping insertion in model container [2023-03-31 23:08:34,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:08:33" (2/3) ... [2023-03-31 23:08:34,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@380c81f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:08:34, skipping insertion in model container [2023-03-31 23:08:34,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:08:34" (3/3) ... [2023-03-31 23:08:34,086 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll.c [2023-03-31 23:08:34,097 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 23:08:34,097 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 23:08:34,149 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 23:08:34,161 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;@6034a31a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 23:08:34,161 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 23:08:34,175 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 15 states have (on average 1.4) internal successors, (21), 17 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-03-31 23:08:34,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-03-31 23:08:34,180 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:08:34,180 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:08:34,181 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:08:34,184 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:08:34,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1122353210, now seen corresponding path program 1 times [2023-03-31 23:08:34,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:08:34,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602071594] [2023-03-31 23:08:34,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:08:34,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:08:34,274 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:08:34,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1735058447] [2023-03-31 23:08:34,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:08:34,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:08:34,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:08:34,277 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:08:34,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 23:08:34,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:08:34,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 1 conjunts are in the unsatisfiable core [2023-03-31 23:08:34,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:08:34,376 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-31 23:08:34,376 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:08:34,377 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:08:34,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602071594] [2023-03-31 23:08:34,377 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:08:34,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735058447] [2023-03-31 23:08:34,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735058447] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:08:34,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:08:34,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-03-31 23:08:34,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776735793] [2023-03-31 23:08:34,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:08:34,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-03-31 23:08:34,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:08:34,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-03-31 23:08:34,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-31 23:08:34,421 INFO L87 Difference]: Start difference. First operand has 33 states, 15 states have (on average 1.4) internal successors, (21), 17 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-03-31 23:08:34,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:08:34,448 INFO L93 Difference]: Finished difference Result 54 states and 81 transitions. [2023-03-31 23:08:34,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-03-31 23:08:34,450 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 23 [2023-03-31 23:08:34,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:08:34,455 INFO L225 Difference]: With dead ends: 54 [2023-03-31 23:08:34,455 INFO L226 Difference]: Without dead ends: 29 [2023-03-31 23:08:34,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-31 23:08:34,459 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 23:08:34,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 23:08:34,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-03-31 23:08:34,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-03-31 23:08:34,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 15 states have internal predecessors, (16), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-03-31 23:08:34,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2023-03-31 23:08:34,490 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 23 [2023-03-31 23:08:34,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:08:34,491 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2023-03-31 23:08:34,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-03-31 23:08:34,492 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2023-03-31 23:08:34,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-03-31 23:08:34,492 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:08:34,493 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:08:34,499 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-31 23:08:34,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-03-31 23:08:34,701 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:08:34,702 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:08:34,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1455861909, now seen corresponding path program 1 times [2023-03-31 23:08:34,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:08:34,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810920525] [2023-03-31 23:08:34,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:08:34,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:08:34,730 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:08:34,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [340374174] [2023-03-31 23:08:34,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:08:34,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:08:34,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:08:34,737 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:08:34,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 23:08:34,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:08:34,798 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-31 23:08:34,800 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:08:34,867 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-03-31 23:08:34,868 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:08:34,919 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-03-31 23:08:34,919 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:08:34,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810920525] [2023-03-31 23:08:34,919 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:08:34,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340374174] [2023-03-31 23:08:34,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340374174] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:08:34,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [929944007] [2023-03-31 23:08:34,931 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-03-31 23:08:34,931 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:08:34,933 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:08:34,936 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:08:34,936 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:08:34,990 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:08:35,310 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2023-03-31 23:08:35,311 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:08:35,316 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:08:35,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [929944007] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:08:35,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:08:35,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [5, 5] total 15 [2023-03-31 23:08:35,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429895487] [2023-03-31 23:08:35,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:08:35,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-31 23:08:35,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:08:35,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-31 23:08:35,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2023-03-31 23:08:35,579 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand has 12 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 23:08:36,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:08:36,409 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2023-03-31 23:08:36,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-03-31 23:08:36,409 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 24 [2023-03-31 23:08:36,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:08:36,411 INFO L225 Difference]: With dead ends: 39 [2023-03-31 23:08:36,411 INFO L226 Difference]: Without dead ends: 31 [2023-03-31 23:08:36,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2023-03-31 23:08:36,414 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 58 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 23:08:36,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 6 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 23:08:36,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-03-31 23:08:36,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-03-31 23:08:36,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-03-31 23:08:36,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2023-03-31 23:08:36,449 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 24 [2023-03-31 23:08:36,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:08:36,450 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2023-03-31 23:08:36,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 23:08:36,450 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2023-03-31 23:08:36,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-03-31 23:08:36,450 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:08:36,450 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:08:36,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 23:08:36,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-03-31 23:08:36,656 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:08:36,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:08:36,656 INFO L85 PathProgramCache]: Analyzing trace with hash -2104046235, now seen corresponding path program 1 times [2023-03-31 23:08:36,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:08:36,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992869190] [2023-03-31 23:08:36,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:08:36,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:08:36,665 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:08:36,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [367458188] [2023-03-31 23:08:36,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:08:36,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:08:36,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:08:36,681 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:08:36,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 23:08:36,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:08:36,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 17 conjunts are in the unsatisfiable core [2023-03-31 23:08:36,743 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:08:36,786 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-03-31 23:08:36,787 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:08:36,833 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-31 23:08:36,833 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:08:36,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992869190] [2023-03-31 23:08:36,833 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:08:36,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367458188] [2023-03-31 23:08:36,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367458188] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-31 23:08:36,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:08:36,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-03-31 23:08:36,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038106405] [2023-03-31 23:08:36,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:08:36,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 23:08:36,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:08:36,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 23:08:36,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-03-31 23:08:36,835 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-03-31 23:08:36,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:08:36,951 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2023-03-31 23:08:36,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 23:08:36,952 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 25 [2023-03-31 23:08:36,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:08:36,953 INFO L225 Difference]: With dead ends: 37 [2023-03-31 23:08:36,953 INFO L226 Difference]: Without dead ends: 35 [2023-03-31 23:08:36,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-03-31 23:08:36,954 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 7 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:08:36,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 96 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:08:36,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-03-31 23:08:36,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-03-31 23:08:36,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-03-31 23:08:36,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2023-03-31 23:08:36,965 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 25 [2023-03-31 23:08:36,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:08:36,965 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2023-03-31 23:08:36,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-03-31 23:08:36,965 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2023-03-31 23:08:36,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-03-31 23:08:36,966 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:08:36,966 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:08:36,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 23:08:37,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:08:37,171 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:08:37,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:08:37,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1053392796, now seen corresponding path program 1 times [2023-03-31 23:08:37,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:08:37,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557294428] [2023-03-31 23:08:37,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:08:37,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:08:37,218 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:08:37,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2074952562] [2023-03-31 23:08:37,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:08:37,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:08:37,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:08:37,221 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:08:37,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 23:08:37,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:08:37,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 23 conjunts are in the unsatisfiable core [2023-03-31 23:08:37,269 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:08:37,372 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-03-31 23:08:37,372 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:08:37,513 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-31 23:08:37,513 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:08:37,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557294428] [2023-03-31 23:08:37,514 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:08:37,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074952562] [2023-03-31 23:08:37,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074952562] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-31 23:08:37,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:08:37,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 12 [2023-03-31 23:08:37,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591140266] [2023-03-31 23:08:37,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:08:37,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 23:08:37,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:08:37,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 23:08:37,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-03-31 23:08:37,515 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-03-31 23:08:37,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:08:37,609 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2023-03-31 23:08:37,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 23:08:37,610 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 30 [2023-03-31 23:08:37,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:08:37,610 INFO L225 Difference]: With dead ends: 48 [2023-03-31 23:08:37,610 INFO L226 Difference]: Without dead ends: 46 [2023-03-31 23:08:37,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-03-31 23:08:37,611 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:08:37,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 108 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:08:37,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-03-31 23:08:37,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2023-03-31 23:08:37,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-03-31 23:08:37,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2023-03-31 23:08:37,625 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 30 [2023-03-31 23:08:37,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:08:37,626 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2023-03-31 23:08:37,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-03-31 23:08:37,626 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2023-03-31 23:08:37,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-03-31 23:08:37,627 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:08:37,627 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:08:37,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-31 23:08:37,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:08:37,832 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:08:37,832 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:08:37,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1852682117, now seen corresponding path program 1 times [2023-03-31 23:08:37,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:08:37,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128336567] [2023-03-31 23:08:37,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:08:37,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:08:37,842 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:08:37,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [650031955] [2023-03-31 23:08:37,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:08:37,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:08:37,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:08:37,881 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:08:37,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 23:08:37,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:08:37,919 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 17 conjunts are in the unsatisfiable core [2023-03-31 23:08:37,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:08:37,978 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-03-31 23:08:37,978 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:08:38,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:08:38,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128336567] [2023-03-31 23:08:38,039 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:08:38,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650031955] [2023-03-31 23:08:38,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650031955] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:08:38,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [122628128] [2023-03-31 23:08:38,041 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-03-31 23:08:38,041 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:08:38,042 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:08:38,042 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:08:38,042 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:08:38,062 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:08:38,290 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2023-03-31 23:08:38,296 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2023-03-31 23:08:38,297 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:08:38,300 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:08:38,770 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1250#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 23:08:38,770 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:08:38,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:08:38,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-03-31 23:08:38,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796905281] [2023-03-31 23:08:38,771 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-03-31 23:08:38,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 23:08:38,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:08:38,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 23:08:38,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2023-03-31 23:08:38,772 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-03-31 23:08:38,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:08:38,849 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2023-03-31 23:08:38,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 23:08:38,850 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 35 [2023-03-31 23:08:38,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:08:38,851 INFO L225 Difference]: With dead ends: 52 [2023-03-31 23:08:38,851 INFO L226 Difference]: Without dead ends: 50 [2023-03-31 23:08:38,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2023-03-31 23:08:38,852 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 11 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 23:08:38,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 111 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 23:08:38,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-03-31 23:08:38,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2023-03-31 23:08:38,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-03-31 23:08:38,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2023-03-31 23:08:38,879 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 35 [2023-03-31 23:08:38,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:08:38,880 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2023-03-31 23:08:38,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-03-31 23:08:38,880 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2023-03-31 23:08:38,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-03-31 23:08:38,880 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:08:38,880 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:08:38,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-03-31 23:08:39,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:08:39,085 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:08:39,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:08:39,086 INFO L85 PathProgramCache]: Analyzing trace with hash 650453244, now seen corresponding path program 1 times [2023-03-31 23:08:39,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:08:39,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201099845] [2023-03-31 23:08:39,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:08:39,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:08:39,111 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:08:39,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1637957752] [2023-03-31 23:08:39,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:08:39,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:08:39,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:08:39,112 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:08:39,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-31 23:08:39,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:08:39,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 24 conjunts are in the unsatisfiable core [2023-03-31 23:08:39,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:08:39,251 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-03-31 23:08:39,252 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:08:39,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:08:39,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201099845] [2023-03-31 23:08:39,329 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:08:39,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637957752] [2023-03-31 23:08:39,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637957752] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:08:39,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [237644606] [2023-03-31 23:08:39,331 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-03-31 23:08:39,331 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:08:39,331 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:08:39,331 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:08:39,331 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:08:39,344 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:08:39,580 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2023-03-31 23:08:39,586 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2023-03-31 23:08:39,586 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:08:39,589 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:08:40,188 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1566#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 23:08:40,188 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:08:40,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:08:40,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-03-31 23:08:40,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902676587] [2023-03-31 23:08:40,188 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-03-31 23:08:40,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 23:08:40,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:08:40,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 23:08:40,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2023-03-31 23:08:40,189 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-03-31 23:08:40,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:08:40,281 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2023-03-31 23:08:40,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 23:08:40,281 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 40 [2023-03-31 23:08:40,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:08:40,282 INFO L225 Difference]: With dead ends: 56 [2023-03-31 23:08:40,282 INFO L226 Difference]: Without dead ends: 54 [2023-03-31 23:08:40,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 57 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2023-03-31 23:08:40,283 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 12 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:08:40,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 90 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:08:40,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-03-31 23:08:40,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2023-03-31 23:08:40,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-03-31 23:08:40,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2023-03-31 23:08:40,294 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 40 [2023-03-31 23:08:40,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:08:40,294 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2023-03-31 23:08:40,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-03-31 23:08:40,295 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2023-03-31 23:08:40,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-03-31 23:08:40,295 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:08:40,295 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:08:40,311 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-03-31 23:08:40,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:08:40,501 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:08:40,502 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:08:40,502 INFO L85 PathProgramCache]: Analyzing trace with hash 307086670, now seen corresponding path program 1 times [2023-03-31 23:08:40,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:08:40,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434992373] [2023-03-31 23:08:40,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:08:40,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:08:40,509 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:08:40,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1427639665] [2023-03-31 23:08:40,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:08:40,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:08:40,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:08:40,525 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:08:40,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-31 23:08:40,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:08:40,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 9 conjunts are in the unsatisfiable core [2023-03-31 23:08:40,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:08:40,666 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-03-31 23:08:40,666 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:08:40,714 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-03-31 23:08:40,714 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:08:40,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434992373] [2023-03-31 23:08:40,714 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:08:40,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427639665] [2023-03-31 23:08:40,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427639665] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:08:40,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [977887209] [2023-03-31 23:08:40,717 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-03-31 23:08:40,717 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:08:40,718 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:08:40,718 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:08:40,718 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:08:40,727 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:08:41,533 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2023-03-31 23:08:41,538 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2023-03-31 23:08:41,538 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:08:41,540 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:08:42,104 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2048#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 23:08:42,104 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:08:42,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:08:42,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2023-03-31 23:08:42,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423385901] [2023-03-31 23:08:42,105 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:08:42,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 23:08:42,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:08:42,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 23:08:42,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2023-03-31 23:08:42,106 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2023-03-31 23:08:42,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:08:42,282 INFO L93 Difference]: Finished difference Result 100 states and 138 transitions. [2023-03-31 23:08:42,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 23:08:42,282 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 49 [2023-03-31 23:08:42,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:08:42,283 INFO L225 Difference]: With dead ends: 100 [2023-03-31 23:08:42,283 INFO L226 Difference]: Without dead ends: 92 [2023-03-31 23:08:42,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 116 SyntacticMatches, 9 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2023-03-31 23:08:42,284 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 34 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:08:42,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 146 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:08:42,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-03-31 23:08:42,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 83. [2023-03-31 23:08:42,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 44 states have internal predecessors, (52), 32 states have call successors, (32), 8 states have call predecessors, (32), 7 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-03-31 23:08:42,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 114 transitions. [2023-03-31 23:08:42,302 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 114 transitions. Word has length 49 [2023-03-31 23:08:42,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:08:42,302 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 114 transitions. [2023-03-31 23:08:42,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2023-03-31 23:08:42,302 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 114 transitions. [2023-03-31 23:08:42,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-03-31 23:08:42,303 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:08:42,303 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:08:42,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-03-31 23:08:42,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:08:42,507 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:08:42,508 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:08:42,508 INFO L85 PathProgramCache]: Analyzing trace with hash 806512021, now seen corresponding path program 1 times [2023-03-31 23:08:42,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:08:42,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000024687] [2023-03-31 23:08:42,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:08:42,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:08:42,519 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:08:42,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2074119869] [2023-03-31 23:08:42,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:08:42,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:08:42,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:08:42,521 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:08:42,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-03-31 23:08:42,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:08:42,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 31 conjunts are in the unsatisfiable core [2023-03-31 23:08:42,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:08:42,694 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-03-31 23:08:42,694 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:08:42,785 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-03-31 23:08:42,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:08:42,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000024687] [2023-03-31 23:08:42,786 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:08:42,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074119869] [2023-03-31 23:08:42,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074119869] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:08:42,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [912051942] [2023-03-31 23:08:42,787 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2023-03-31 23:08:42,787 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:08:42,787 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:08:42,787 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:08:42,788 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:08:42,797 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:08:43,580 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2023-03-31 23:08:43,585 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2023-03-31 23:08:43,586 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:08:43,588 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:08:44,317 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2705#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 23:08:44,317 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:08:44,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:08:44,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2023-03-31 23:08:44,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710329818] [2023-03-31 23:08:44,318 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:08:44,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-03-31 23:08:44,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:08:44,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-03-31 23:08:44,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2023-03-31 23:08:44,319 INFO L87 Difference]: Start difference. First operand 83 states and 114 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 6 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2023-03-31 23:08:44,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:08:44,728 INFO L93 Difference]: Finished difference Result 126 states and 179 transitions. [2023-03-31 23:08:44,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-03-31 23:08:44,729 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 6 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 55 [2023-03-31 23:08:44,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:08:44,731 INFO L225 Difference]: With dead ends: 126 [2023-03-31 23:08:44,731 INFO L226 Difference]: Without dead ends: 122 [2023-03-31 23:08:44,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 135 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2023-03-31 23:08:44,732 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 37 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 23:08:44,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 200 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 23:08:44,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-03-31 23:08:44,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 90. [2023-03-31 23:08:44,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 49 states have internal predecessors, (56), 34 states have call successors, (34), 9 states have call predecessors, (34), 8 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2023-03-31 23:08:44,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 122 transitions. [2023-03-31 23:08:44,762 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 122 transitions. Word has length 55 [2023-03-31 23:08:44,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:08:44,762 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 122 transitions. [2023-03-31 23:08:44,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 6 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2023-03-31 23:08:44,763 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 122 transitions. [2023-03-31 23:08:44,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-03-31 23:08:44,767 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:08:44,768 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:08:44,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-03-31 23:08:44,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-03-31 23:08:44,973 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:08:44,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:08:44,973 INFO L85 PathProgramCache]: Analyzing trace with hash 2027068716, now seen corresponding path program 2 times [2023-03-31 23:08:44,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:08:44,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137106053] [2023-03-31 23:08:44,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:08:44,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:08:44,982 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:08:44,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1318481411] [2023-03-31 23:08:44,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 23:08:44,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:08:44,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:08:44,984 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:08:44,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-03-31 23:08:45,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-03-31 23:08:45,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 23:08:45,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 41 conjunts are in the unsatisfiable core [2023-03-31 23:08:45,032 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:08:45,338 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-03-31 23:08:45,338 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:08:45,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:08:45,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137106053] [2023-03-31 23:08:45,509 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:08:45,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318481411] [2023-03-31 23:08:45,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318481411] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:08:45,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1119844362] [2023-03-31 23:08:45,511 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2023-03-31 23:08:45,511 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:08:45,511 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:08:45,511 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:08:45,511 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:08:45,521 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:08:46,232 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2023-03-31 23:08:46,236 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2023-03-31 23:08:46,237 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:08:46,239 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:08:47,155 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3338#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 23:08:47,155 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:08:47,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:08:47,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-03-31 23:08:47,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322891413] [2023-03-31 23:08:47,155 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-03-31 23:08:47,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-31 23:08:47,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:08:47,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-31 23:08:47,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=850, Unknown=0, NotChecked=0, Total=992 [2023-03-31 23:08:47,157 INFO L87 Difference]: Start difference. First operand 90 states and 122 transitions. Second operand has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) [2023-03-31 23:08:47,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:08:47,394 INFO L93 Difference]: Finished difference Result 122 states and 161 transitions. [2023-03-31 23:08:47,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-31 23:08:47,394 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) Word has length 60 [2023-03-31 23:08:47,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:08:47,395 INFO L225 Difference]: With dead ends: 122 [2023-03-31 23:08:47,395 INFO L226 Difference]: Without dead ends: 120 [2023-03-31 23:08:47,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 102 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=166, Invalid=1024, Unknown=0, NotChecked=0, Total=1190 [2023-03-31 23:08:47,396 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 33 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 23:08:47,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 125 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 23:08:47,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-03-31 23:08:47,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2023-03-31 23:08:47,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 63 states have (on average 1.1746031746031746) internal successors, (74), 65 states have internal predecessors, (74), 42 states have call successors, (42), 12 states have call predecessors, (42), 11 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2023-03-31 23:08:47,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 156 transitions. [2023-03-31 23:08:47,422 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 156 transitions. Word has length 60 [2023-03-31 23:08:47,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:08:47,422 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 156 transitions. [2023-03-31 23:08:47,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) [2023-03-31 23:08:47,422 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 156 transitions. [2023-03-31 23:08:47,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-03-31 23:08:47,423 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:08:47,423 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:08:47,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-03-31 23:08:47,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:08:47,628 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:08:47,628 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:08:47,628 INFO L85 PathProgramCache]: Analyzing trace with hash -2073713739, now seen corresponding path program 3 times [2023-03-31 23:08:47,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:08:47,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078549028] [2023-03-31 23:08:47,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:08:47,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:08:47,636 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:08:47,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [578062604] [2023-03-31 23:08:47,636 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 23:08:47,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:08:47,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:08:47,639 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:08:47,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-03-31 23:08:47,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 23:08:47,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 23:08:47,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 38 conjunts are in the unsatisfiable core [2023-03-31 23:08:47,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:08:47,887 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-03-31 23:08:47,887 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:08:47,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:08:47,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078549028] [2023-03-31 23:08:47,951 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:08:47,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578062604] [2023-03-31 23:08:47,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578062604] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:08:47,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1045154739] [2023-03-31 23:08:47,952 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2023-03-31 23:08:47,952 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:08:47,952 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:08:47,953 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:08:47,953 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:08:47,966 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:08:48,675 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2023-03-31 23:08:48,680 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2023-03-31 23:08:48,680 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:08:48,682 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:08:49,552 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3955#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 23:08:49,553 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:08:49,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:08:49,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-03-31 23:08:49,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707968560] [2023-03-31 23:08:49,553 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-03-31 23:08:49,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-03-31 23:08:49,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:08:49,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-03-31 23:08:49,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2023-03-31 23:08:49,554 INFO L87 Difference]: Start difference. First operand 117 states and 156 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-03-31 23:08:49,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:08:49,709 INFO L93 Difference]: Finished difference Result 179 states and 246 transitions. [2023-03-31 23:08:49,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 23:08:49,709 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 65 [2023-03-31 23:08:49,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:08:49,713 INFO L225 Difference]: With dead ends: 179 [2023-03-31 23:08:49,713 INFO L226 Difference]: Without dead ends: 177 [2023-03-31 23:08:49,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 99 SyntacticMatches, 8 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2023-03-31 23:08:49,718 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 20 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:08:49,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 144 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:08:49,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-03-31 23:08:49,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 174. [2023-03-31 23:08:49,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 93 states have (on average 1.1935483870967742) internal successors, (111), 95 states have internal predecessors, (111), 66 states have call successors, (66), 15 states have call predecessors, (66), 14 states have return successors, (64), 63 states have call predecessors, (64), 64 states have call successors, (64) [2023-03-31 23:08:49,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 241 transitions. [2023-03-31 23:08:49,783 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 241 transitions. Word has length 65 [2023-03-31 23:08:49,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:08:49,783 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 241 transitions. [2023-03-31 23:08:49,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-03-31 23:08:49,783 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 241 transitions. [2023-03-31 23:08:49,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-03-31 23:08:49,784 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:08:49,784 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:08:49,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-03-31 23:08:49,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-03-31 23:08:49,989 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:08:49,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:08:49,989 INFO L85 PathProgramCache]: Analyzing trace with hash 865217645, now seen corresponding path program 1 times [2023-03-31 23:08:49,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:08:49,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099009924] [2023-03-31 23:08:49,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:08:49,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:08:50,005 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:08:50,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [201989617] [2023-03-31 23:08:50,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:08:50,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:08:50,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:08:50,006 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:08:50,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-03-31 23:08:50,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:08:50,057 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 45 conjunts are in the unsatisfiable core [2023-03-31 23:08:50,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:08:50,406 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 16 proven. 11 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-03-31 23:08:50,406 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:08:51,025 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-03-31 23:08:51,025 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:08:51,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099009924] [2023-03-31 23:08:51,025 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:08:51,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201989617] [2023-03-31 23:08:51,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201989617] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:08:51,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [985927574] [2023-03-31 23:08:51,026 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-03-31 23:08:51,026 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:08:51,027 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:08:51,027 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:08:51,027 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:08:51,043 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:08:51,812 WARN L110 ntervalStateProvider]: Interval conversion did not stabilize in 17 iterations. Over-approximation may be very coarse. [2023-03-31 23:08:52,306 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2023-03-31 23:08:52,309 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2023-03-31 23:08:52,309 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:08:52,313 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:08:54,179 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4980#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 23:08:54,180 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:08:54,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:08:54,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2023-03-31 23:08:54,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316357723] [2023-03-31 23:08:54,180 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:08:54,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-03-31 23:08:54,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:08:54,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-03-31 23:08:54,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1105, Unknown=0, NotChecked=0, Total=1260 [2023-03-31 23:08:54,181 INFO L87 Difference]: Start difference. First operand 174 states and 241 transitions. Second operand has 20 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2023-03-31 23:09:01,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:09:01,835 INFO L93 Difference]: Finished difference Result 280 states and 410 transitions. [2023-03-31 23:09:01,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-03-31 23:09:01,836 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) Word has length 71 [2023-03-31 23:09:01,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:09:01,837 INFO L225 Difference]: With dead ends: 280 [2023-03-31 23:09:01,837 INFO L226 Difference]: Without dead ends: 276 [2023-03-31 23:09:01,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=401, Invalid=2679, Unknown=0, NotChecked=0, Total=3080 [2023-03-31 23:09:01,839 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 93 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-03-31 23:09:01,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 273 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-03-31 23:09:01,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2023-03-31 23:09:01,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 272. [2023-03-31 23:09:01,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 139 states have (on average 1.223021582733813) internal successors, (170), 140 states have internal predecessors, (170), 115 states have call successors, (115), 18 states have call predecessors, (115), 17 states have return successors, (113), 113 states have call predecessors, (113), 113 states have call successors, (113) [2023-03-31 23:09:01,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 398 transitions. [2023-03-31 23:09:01,947 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 398 transitions. Word has length 71 [2023-03-31 23:09:01,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:09:01,948 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 398 transitions. [2023-03-31 23:09:01,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2023-03-31 23:09:01,948 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 398 transitions. [2023-03-31 23:09:01,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-03-31 23:09:01,948 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:09:01,948 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:09:01,953 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-03-31 23:09:02,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-03-31 23:09:02,153 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:09:02,153 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:09:02,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1918400155, now seen corresponding path program 4 times [2023-03-31 23:09:02,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:09:02,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762234172] [2023-03-31 23:09:02,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:09:02,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:09:02,159 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:09:02,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1375753626] [2023-03-31 23:09:02,159 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 23:09:02,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:09:02,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:09:02,164 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:09:02,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-03-31 23:09:02,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:09:02,211 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 5 conjunts are in the unsatisfiable core [2023-03-31 23:09:02,212 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:09:02,234 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2023-03-31 23:09:02,234 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:09:02,234 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:09:02,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762234172] [2023-03-31 23:09:02,234 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:09:02,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375753626] [2023-03-31 23:09:02,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375753626] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:09:02,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:09:02,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 23:09:02,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109176721] [2023-03-31 23:09:02,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:09:02,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 23:09:02,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:09:02,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 23:09:02,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 23:09:02,235 INFO L87 Difference]: Start difference. First operand 272 states and 398 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-03-31 23:09:02,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:09:02,336 INFO L93 Difference]: Finished difference Result 349 states and 501 transitions. [2023-03-31 23:09:02,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 23:09:02,337 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 85 [2023-03-31 23:09:02,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:09:02,338 INFO L225 Difference]: With dead ends: 349 [2023-03-31 23:09:02,338 INFO L226 Difference]: Without dead ends: 199 [2023-03-31 23:09:02,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-03-31 23:09:02,339 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 23:09:02,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 117 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 23:09:02,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2023-03-31 23:09:02,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 197. [2023-03-31 23:09:02,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 104 states have (on average 1.1538461538461537) internal successors, (120), 105 states have internal predecessors, (120), 75 states have call successors, (75), 18 states have call predecessors, (75), 17 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2023-03-31 23:09:02,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 268 transitions. [2023-03-31 23:09:02,398 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 268 transitions. Word has length 85 [2023-03-31 23:09:02,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:09:02,398 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 268 transitions. [2023-03-31 23:09:02,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-03-31 23:09:02,398 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 268 transitions. [2023-03-31 23:09:02,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-03-31 23:09:02,399 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:09:02,399 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:09:02,403 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-03-31 23:09:02,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-03-31 23:09:02,603 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:09:02,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:09:02,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1165103916, now seen corresponding path program 1 times [2023-03-31 23:09:02,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:09:02,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364270544] [2023-03-31 23:09:02,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:09:02,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:09:02,610 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:09:02,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [323312893] [2023-03-31 23:09:02,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:09:02,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:09:02,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:09:02,611 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:09:02,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-03-31 23:09:02,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:09:02,672 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 52 conjunts are in the unsatisfiable core [2023-03-31 23:09:02,674 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:09:03,260 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 51 proven. 22 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2023-03-31 23:09:03,261 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:09:06,201 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 51 proven. 19 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2023-03-31 23:09:06,201 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:09:06,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364270544] [2023-03-31 23:09:06,201 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:09:06,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323312893] [2023-03-31 23:09:06,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323312893] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:09:06,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [334360524] [2023-03-31 23:09:06,203 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2023-03-31 23:09:06,203 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:09:06,203 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:09:06,203 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:09:06,203 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:09:06,211 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:09:06,902 WARN L110 ntervalStateProvider]: Interval conversion did not stabilize in 17 iterations. Over-approximation may be very coarse. [2023-03-31 23:09:07,391 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2023-03-31 23:09:07,394 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2023-03-31 23:09:07,395 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:09:07,397 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:09:11,598 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7611#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 23:09:11,599 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:09:11,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:09:11,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2023-03-31 23:09:11,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985408302] [2023-03-31 23:09:11,599 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:09:11,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-03-31 23:09:11,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:09:11,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-03-31 23:09:11,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1088, Unknown=0, NotChecked=0, Total=1260 [2023-03-31 23:09:11,600 INFO L87 Difference]: Start difference. First operand 197 states and 268 transitions. Second operand has 21 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 11 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (31), 11 states have call predecessors, (31), 10 states have call successors, (31) [2023-03-31 23:09:13,616 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-03-31 23:09:27,430 WARN L223 SmtUtils]: Spent 11.90s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-03-31 23:09:36,076 WARN L223 SmtUtils]: Spent 5.64s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-03-31 23:09:38,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []