/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 22:51:52,180 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 22:51:52,181 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 22:51:52,211 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 22:51:52,211 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 22:51:52,213 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 22:51:52,215 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 22:51:52,216 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 22:51:52,217 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 22:51:52,221 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 22:51:52,222 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 22:51:52,223 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 22:51:52,223 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 22:51:52,225 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 22:51:52,226 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 22:51:52,227 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 22:51:52,227 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 22:51:52,228 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 22:51:52,230 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 22:51:52,233 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 22:51:52,234 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 22:51:52,234 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 22:51:52,235 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 22:51:52,236 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 22:51:52,241 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 22:51:52,242 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 22:51:52,242 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 22:51:52,243 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 22:51:52,243 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 22:51:52,243 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 22:51:52,244 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 22:51:52,244 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 22:51:52,245 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 22:51:52,245 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 22:51:52,246 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 22:51:52,246 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 22:51:52,246 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 22:51:52,246 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 22:51:52,247 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 22:51:52,247 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 22:51:52,247 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 22:51:52,248 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-02 22:51:52,269 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 22:51:52,269 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 22:51:52,270 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 22:51:52,270 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 22:51:52,270 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 22:51:52,270 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 22:51:52,270 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 22:51:52,271 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 22:51:52,271 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 22:51:52,271 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 22:51:52,271 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 22:51:52,271 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 22:51:52,272 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 22:51:52,272 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 22:51:52,272 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 22:51:52,272 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 22:51:52,272 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 22:51:52,272 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 22:51:52,272 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 22:51:52,273 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 22:51:52,273 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 22:51:52,273 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 22:51:52,273 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 22:51:52,273 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 22:51:52,273 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 22:51:52,273 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 22:51:52,273 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 22:51:52,273 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 22:51:52,273 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 22:51:52,274 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 22:51:52,274 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 22:51:52,274 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 22:51:52,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 22:51:52,274 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 22:51:52,274 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 22:51:52,274 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 22:51:52,274 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 22:51:52,274 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 22:51:52,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 22:51:52,275 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 22:51:52,275 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 22:51:52,275 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 22:51:52,445 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 22:51:52,460 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 22:51:52,461 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 22:51:52,462 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 22:51:52,464 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 22:51:52,465 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound5.c [2023-04-02 22:51:53,418 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 22:51:53,585 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 22:51:53,586 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound5.c [2023-04-02 22:51:53,589 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b1263c10/98cb800f13a44b3e87d6a4b98c8aecef/FLAG635539e35 [2023-04-02 22:51:53,598 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b1263c10/98cb800f13a44b3e87d6a4b98c8aecef [2023-04-02 22:51:53,599 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 22:51:53,600 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 22:51:53,601 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 22:51:53,601 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 22:51:53,603 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 22:51:53,603 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 10:51:53" (1/1) ... [2023-04-02 22:51:53,604 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61c04667 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:51:53, skipping insertion in model container [2023-04-02 22:51:53,604 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 10:51:53" (1/1) ... [2023-04-02 22:51:53,608 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 22:51:53,617 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 22:51:53,696 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-scaling/egcd-ll_valuebound5.c[489,502] [2023-04-02 22:51:53,705 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 22:51:53,711 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 22:51:53,718 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-scaling/egcd-ll_valuebound5.c[489,502] [2023-04-02 22:51:53,722 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 22:51:53,730 INFO L208 MainTranslator]: Completed translation [2023-04-02 22:51:53,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:51:53 WrapperNode [2023-04-02 22:51:53,731 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 22:51:53,731 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 22:51:53,732 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 22:51:53,732 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 22:51:53,739 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:51:53" (1/1) ... [2023-04-02 22:51:53,739 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:51:53" (1/1) ... [2023-04-02 22:51:53,743 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:51:53" (1/1) ... [2023-04-02 22:51:53,743 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:51:53" (1/1) ... [2023-04-02 22:51:53,746 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:51:53" (1/1) ... [2023-04-02 22:51:53,747 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:51:53" (1/1) ... [2023-04-02 22:51:53,751 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:51:53" (1/1) ... [2023-04-02 22:51:53,752 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:51:53" (1/1) ... [2023-04-02 22:51:53,753 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 22:51:53,754 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 22:51:53,754 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 22:51:53,754 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 22:51:53,754 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:51:53" (1/1) ... [2023-04-02 22:51:53,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 22:51:53,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:51:53,773 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 22:51:53,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 22:51:53,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 22:51:53,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 22:51:53,804 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 22:51:53,804 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 22:51:53,804 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 22:51:53,804 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 22:51:53,804 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 22:51:53,804 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 22:51:53,804 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 22:51:53,805 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 22:51:53,805 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 22:51:53,805 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 22:51:53,805 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 22:51:53,805 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 22:51:53,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 22:51:53,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 22:51:53,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 22:51:53,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 22:51:53,805 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 22:51:53,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 22:51:53,847 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 22:51:53,848 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 22:51:53,971 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 22:51:54,017 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 22:51:54,017 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 22:51:54,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 10:51:54 BoogieIcfgContainer [2023-04-02 22:51:54,019 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 22:51:54,020 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 22:51:54,020 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 22:51:54,022 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 22:51:54,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 10:51:53" (1/3) ... [2023-04-02 22:51:54,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33044e0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 10:51:54, skipping insertion in model container [2023-04-02 22:51:54,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:51:53" (2/3) ... [2023-04-02 22:51:54,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33044e0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 10:51:54, skipping insertion in model container [2023-04-02 22:51:54,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 10:51:54" (3/3) ... [2023-04-02 22:51:54,024 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound5.c [2023-04-02 22:51:54,035 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 22:51:54,035 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 22:51:54,068 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 22:51:54,072 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;@31fce0a4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 22:51:54,072 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 22:51:54,081 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-04-02 22:51:54,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-02 22:51:54,086 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:51:54,086 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] [2023-04-02 22:51:54,087 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:51:54,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:51:54,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1201008584, now seen corresponding path program 1 times [2023-04-02 22:51:54,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:51:54,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25847657] [2023-04-02 22:51:54,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:51:54,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:51:54,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:51:54,230 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 22:51:54,231 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:51:54,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25847657] [2023-04-02 22:51:54,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25847657] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:51:54,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:51:54,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-02 22:51:54,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783204661] [2023-04-02 22:51:54,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:51:54,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-02 22:51:54,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:51:54,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-02 22:51:54,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 22:51:54,274 INFO L87 Difference]: Start difference. First operand has 32 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) [2023-04-02 22:51:54,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:51:54,323 INFO L93 Difference]: Finished difference Result 51 states and 77 transitions. [2023-04-02 22:51:54,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-02 22:51:54,325 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 24 [2023-04-02 22:51:54,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:51:54,330 INFO L225 Difference]: With dead ends: 51 [2023-04-02 22:51:54,330 INFO L226 Difference]: Without dead ends: 28 [2023-04-02 22:51:54,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 22:51:54,334 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:51:54,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:51:54,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-02 22:51:54,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-04-02 22:51:54,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-02 22:51:54,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2023-04-02 22:51:54,357 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 24 [2023-04-02 22:51:54,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:51:54,358 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2023-04-02 22:51:54,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) [2023-04-02 22:51:54,359 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2023-04-02 22:51:54,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-02 22:51:54,359 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:51:54,360 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] [2023-04-02 22:51:54,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 22:51:54,360 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:51:54,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:51:54,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1269527884, now seen corresponding path program 1 times [2023-04-02 22:51:54,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:51:54,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283750070] [2023-04-02 22:51:54,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:51:54,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:51:54,379 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:51:54,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [480865525] [2023-04-02 22:51:54,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:51:54,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:51:54,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:51:54,381 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:51:54,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 22:51:54,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:51:54,464 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-02 22:51:54,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:51:54,548 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-02 22:51:54,548 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 22:51:54,548 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:51:54,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283750070] [2023-04-02 22:51:54,549 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:51:54,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480865525] [2023-04-02 22:51:54,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480865525] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:51:54,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:51:54,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 22:51:54,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587458921] [2023-04-02 22:51:54,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:51:54,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 22:51:54,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:51:54,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 22:51:54,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 22:51:54,551 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-02 22:51:54,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:51:54,617 INFO L93 Difference]: Finished difference Result 43 states and 58 transitions. [2023-04-02 22:51:54,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 22:51:54,618 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 24 [2023-04-02 22:51:54,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:51:54,619 INFO L225 Difference]: With dead ends: 43 [2023-04-02 22:51:54,619 INFO L226 Difference]: Without dead ends: 41 [2023-04-02 22:51:54,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-02 22:51:54,620 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 6 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:51:54,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 101 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:51:54,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-04-02 22:51:54,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2023-04-02 22:51:54,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2023-04-02 22:51:54,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 55 transitions. [2023-04-02 22:51:54,628 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 55 transitions. Word has length 24 [2023-04-02 22:51:54,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:51:54,628 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 55 transitions. [2023-04-02 22:51:54,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-02 22:51:54,629 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 55 transitions. [2023-04-02 22:51:54,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-02 22:51:54,629 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:51:54,629 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] [2023-04-02 22:51:54,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 22:51:54,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:51:54,843 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:51:54,843 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:51:54,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1521017309, now seen corresponding path program 1 times [2023-04-02 22:51:54,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:51:54,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915811081] [2023-04-02 22:51:54,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:51:54,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:51:54,864 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:51:54,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [782037359] [2023-04-02 22:51:54,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:51:54,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:51:54,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:51:54,878 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:51:54,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 22:51:54,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:51:54,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-02 22:51:54,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:51:55,025 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 22:51:55,025 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:51:55,182 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:51:55,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915811081] [2023-04-02 22:51:55,182 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:51:55,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782037359] [2023-04-02 22:51:55,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782037359] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 22:51:55,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2087392963] [2023-04-02 22:51:55,197 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-02 22:51:55,197 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:51:55,200 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:51:55,203 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:51:55,203 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:51:55,276 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:51:55,510 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2023-04-02 22:51:55,514 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 9 for LOIs [2023-04-02 22:51:55,515 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:51:55,520 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:51:55,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [2087392963] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:51:55,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 22:51:55,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [7] total 20 [2023-04-02 22:51:55,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942230602] [2023-04-02 22:51:55,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:51:55,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-02 22:51:55,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:51:55,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-02 22:51:55,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2023-04-02 22:51:55,793 INFO L87 Difference]: Start difference. First operand 40 states and 55 transitions. Second operand has 15 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 7 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 22:51:56,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:51:56,633 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2023-04-02 22:51:56,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-02 22:51:56,634 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 7 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 29 [2023-04-02 22:51:56,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:51:56,635 INFO L225 Difference]: With dead ends: 47 [2023-04-02 22:51:56,635 INFO L226 Difference]: Without dead ends: 43 [2023-04-02 22:51:56,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=220, Invalid=902, Unknown=0, NotChecked=0, Total=1122 [2023-04-02 22:51:56,636 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 53 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 22:51:56,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 5 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 22:51:56,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-04-02 22:51:56,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-04-02 22:51:56,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-04-02 22:51:56,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2023-04-02 22:51:56,651 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 29 [2023-04-02 22:51:56,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:51:56,654 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2023-04-02 22:51:56,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 7 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 22:51:56,654 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2023-04-02 22:51:56,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-04-02 22:51:56,655 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:51:56,655 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] [2023-04-02 22:51:56,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 22:51:56,855 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,SelfDestructingSolverStorable2 [2023-04-02 22:51:56,856 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:51:56,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:51:56,856 INFO L85 PathProgramCache]: Analyzing trace with hash -109978194, now seen corresponding path program 1 times [2023-04-02 22:51:56,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:51:56,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566669416] [2023-04-02 22:51:56,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:51:56,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:51:56,866 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:51:56,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [412106288] [2023-04-02 22:51:56,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:51:56,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:51:56,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:51:56,885 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:51:56,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 22:51:56,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:51:56,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-02 22:51:56,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:51:56,939 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-02 22:51:56,939 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 22:51:56,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:51:56,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566669416] [2023-04-02 22:51:56,941 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:51:56,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412106288] [2023-04-02 22:51:56,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412106288] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:51:56,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:51:56,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 22:51:56,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375566774] [2023-04-02 22:51:56,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:51:56,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 22:51:56,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:51:56,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 22:51:56,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 22:51:56,943 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2023-04-02 22:51:56,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:51:56,977 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2023-04-02 22:51:56,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 22:51:56,978 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 40 [2023-04-02 22:51:56,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:51:56,978 INFO L225 Difference]: With dead ends: 49 [2023-04-02 22:51:56,978 INFO L226 Difference]: Without dead ends: 47 [2023-04-02 22:51:56,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 22:51:56,979 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 5 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:51:56,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 110 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:51:56,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-04-02 22:51:56,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-04-02 22:51:56,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 24 states have internal predecessors, (25), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-04-02 22:51:56,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2023-04-02 22:51:56,989 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 40 [2023-04-02 22:51:56,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:51:56,989 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2023-04-02 22:51:56,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2023-04-02 22:51:56,989 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2023-04-02 22:51:56,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-02 22:51:56,990 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:51:56,990 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 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] [2023-04-02 22:51:56,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 22:51:57,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:51:57,194 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:51:57,195 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:51:57,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1626365341, now seen corresponding path program 1 times [2023-04-02 22:51:57,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:51:57,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280054050] [2023-04-02 22:51:57,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:51:57,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:51:57,203 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:51:57,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [698978863] [2023-04-02 22:51:57,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:51:57,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:51:57,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:51:57,204 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:51:57,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 22:51:57,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:51:57,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-02 22:51:57,244 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:51:57,352 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 22:51:57,352 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:51:57,462 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-02 22:51:57,462 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:51:57,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280054050] [2023-04-02 22:51:57,462 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:51:57,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698978863] [2023-04-02 22:51:57,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698978863] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:51:57,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [869405392] [2023-04-02 22:51:57,464 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-02 22:51:57,464 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:51:57,464 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:51:57,464 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:51:57,464 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:51:57,479 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:51:58,337 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2023-04-02 22:51:58,340 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 9 for LOIs [2023-04-02 22:51:58,341 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:51:58,343 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:51:58,712 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1191#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 22:51:58,712 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:51:58,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:51:58,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 12 [2023-04-02 22:51:58,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267439057] [2023-04-02 22:51:58,713 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:51:58,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 22:51:58,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:51:58,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 22:51:58,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2023-04-02 22:51:58,714 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-04-02 22:51:58,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:51:58,864 INFO L93 Difference]: Finished difference Result 62 states and 79 transitions. [2023-04-02 22:51:58,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 22:51:58,865 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 41 [2023-04-02 22:51:58,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:51:58,866 INFO L225 Difference]: With dead ends: 62 [2023-04-02 22:51:58,866 INFO L226 Difference]: Without dead ends: 60 [2023-04-02 22:51:58,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 92 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2023-04-02 22:51:58,866 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 19 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 22:51:58,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 121 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 22:51:58,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-04-02 22:51:58,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 51. [2023-04-02 22:51:58,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 25 states have (on average 1.12) internal successors, (28), 27 states have internal predecessors, (28), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-04-02 22:51:58,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2023-04-02 22:51:58,881 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 41 [2023-04-02 22:51:58,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:51:58,881 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2023-04-02 22:51:58,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-04-02 22:51:58,881 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2023-04-02 22:51:58,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-02 22:51:58,882 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:51:58,882 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 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] [2023-04-02 22:51:58,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-02 22:51:59,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:51:59,087 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:51:59,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:51:59,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1565532503, now seen corresponding path program 1 times [2023-04-02 22:51:59,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:51:59,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762610284] [2023-04-02 22:51:59,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:51:59,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:51:59,099 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:51:59,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [520703217] [2023-04-02 22:51:59,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:51:59,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:51:59,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:51:59,103 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:51:59,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 22:51:59,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:51:59,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 18 conjunts are in the unsatisfiable core [2023-04-02 22:51:59,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:51:59,197 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-02 22:51:59,197 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:51:59,286 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-02 22:51:59,287 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:51:59,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762610284] [2023-04-02 22:51:59,287 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:51:59,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520703217] [2023-04-02 22:51:59,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520703217] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:51:59,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1492721243] [2023-04-02 22:51:59,288 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-04-02 22:51:59,289 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:51:59,289 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:51:59,289 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:51:59,289 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:51:59,298 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:51:59,442 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2023-04-02 22:51:59,444 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 9 for LOIs [2023-04-02 22:51:59,445 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:51:59,447 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:51:59,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1492721243] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:51:59,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:51:59,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [9, 8] total 26 [2023-04-02 22:51:59,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260089401] [2023-04-02 22:51:59,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:51:59,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-02 22:51:59,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:51:59,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-02 22:51:59,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2023-04-02 22:51:59,713 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 16 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 8 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2023-04-02 22:52:00,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:52:00,518 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2023-04-02 22:52:00,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-02 22:52:00,519 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 8 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 45 [2023-04-02 22:52:00,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:52:00,519 INFO L225 Difference]: With dead ends: 61 [2023-04-02 22:52:00,519 INFO L226 Difference]: Without dead ends: 49 [2023-04-02 22:52:00,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=270, Invalid=1136, Unknown=0, NotChecked=0, Total=1406 [2023-04-02 22:52:00,520 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 50 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 22:52:00,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 10 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 22:52:00,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-04-02 22:52:00,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-04-02 22:52:00,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 25 states have (on average 1.08) internal successors, (27), 26 states have internal predecessors, (27), 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) [2023-04-02 22:52:00,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2023-04-02 22:52:00,529 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 45 [2023-04-02 22:52:00,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:52:00,530 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2023-04-02 22:52:00,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 8 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2023-04-02 22:52:00,530 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2023-04-02 22:52:00,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-02 22:52:00,530 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:52:00,530 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 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] [2023-04-02 22:52:00,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 22:52:00,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:52:00,735 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:52:00,735 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:52:00,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1584235564, now seen corresponding path program 2 times [2023-04-02 22:52:00,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:52:00,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561952069] [2023-04-02 22:52:00,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:52:00,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:52:00,742 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:52:00,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1815841302] [2023-04-02 22:52:00,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 22:52:00,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:52:00,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:52:00,743 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) [2023-04-02 22:52:00,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 22:52:00,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-02 22:52:00,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:52:00,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 26 conjunts are in the unsatisfiable core [2023-04-02 22:52:00,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:52:00,964 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-04-02 22:52:00,965 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:52:01,098 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-02 22:52:01,098 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:52:01,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561952069] [2023-04-02 22:52:01,098 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:52:01,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815841302] [2023-04-02 22:52:01,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815841302] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:52:01,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1208080551] [2023-04-02 22:52:01,099 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-02 22:52:01,099 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:52:01,100 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:52:01,100 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:52:01,100 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:52:01,109 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:52:01,741 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2023-04-02 22:52:01,743 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 9 for LOIs [2023-04-02 22:52:01,744 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:52:01,746 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:52:02,394 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2153#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 22:52:02,395 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:52:02,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:52:02,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2023-04-02 22:52:02,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024182813] [2023-04-02 22:52:02,396 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:52:02,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 22:52:02,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:52:02,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 22:52:02,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2023-04-02 22:52:02,397 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2023-04-02 22:52:03,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:52:03,595 INFO L93 Difference]: Finished difference Result 73 states and 94 transitions. [2023-04-02 22:52:03,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 22:52:03,595 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 46 [2023-04-02 22:52:03,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:52:03,596 INFO L225 Difference]: With dead ends: 73 [2023-04-02 22:52:03,596 INFO L226 Difference]: Without dead ends: 71 [2023-04-02 22:52:03,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 106 SyntacticMatches, 8 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2023-04-02 22:52:03,597 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 21 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 22:52:03,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 123 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 22:52:03,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-04-02 22:52:03,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 61. [2023-04-02 22:52:03,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 31 states have (on average 1.096774193548387) internal successors, (34), 33 states have internal predecessors, (34), 21 states have call successors, (21), 9 states have call predecessors, (21), 8 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2023-04-02 22:52:03,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2023-04-02 22:52:03,617 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 46 [2023-04-02 22:52:03,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:52:03,617 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2023-04-02 22:52:03,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2023-04-02 22:52:03,617 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2023-04-02 22:52:03,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-02 22:52:03,619 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:52:03,619 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] [2023-04-02 22:52:03,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-02 22:52:03,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:52:03,823 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:52:03,824 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:52:03,824 INFO L85 PathProgramCache]: Analyzing trace with hash -320866109, now seen corresponding path program 3 times [2023-04-02 22:52:03,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:52:03,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750555817] [2023-04-02 22:52:03,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:52:03,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:52:03,847 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:52:03,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [439629920] [2023-04-02 22:52:03,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 22:52:03,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:52:03,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:52:03,850 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) [2023-04-02 22:52:03,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 22:52:03,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 22:52:03,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:52:03,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2023-04-02 22:52:03,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:52:04,196 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-04-02 22:52:04,196 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:52:04,407 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 27 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-04-02 22:52:04,408 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:52:04,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750555817] [2023-04-02 22:52:04,408 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:52:04,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439629920] [2023-04-02 22:52:04,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439629920] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:52:04,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [50974896] [2023-04-02 22:52:04,409 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-02 22:52:04,409 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:52:04,410 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:52:04,410 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:52:04,410 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:52:04,419 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:52:05,040 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2023-04-02 22:52:05,043 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 9 for LOIs [2023-04-02 22:52:05,044 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:52:05,046 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:52:05,873 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2705#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 22:52:05,873 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:52:05,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:52:05,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 17 [2023-04-02 22:52:05,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870687080] [2023-04-02 22:52:05,873 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:52:05,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-02 22:52:05,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:52:05,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-02 22:52:05,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2023-04-02 22:52:05,874 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand has 17 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 9 states have call predecessors, (17), 5 states have call successors, (17) [2023-04-02 22:52:08,230 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 [] [2023-04-02 22:52:08,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:52:08,398 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2023-04-02 22:52:08,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 22:52:08,398 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 9 states have call predecessors, (17), 5 states have call successors, (17) Word has length 51 [2023-04-02 22:52:08,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:52:08,400 INFO L225 Difference]: With dead ends: 79 [2023-04-02 22:52:08,400 INFO L226 Difference]: Without dead ends: 73 [2023-04-02 22:52:08,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 117 SyntacticMatches, 9 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2023-04-02 22:52:08,401 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 24 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 27 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-04-02 22:52:08,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 122 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 343 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2023-04-02 22:52:08,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-04-02 22:52:08,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2023-04-02 22:52:08,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 40 states have (on average 1.075) internal successors, (43), 42 states have internal predecessors, (43), 19 states have call successors, (19), 12 states have call predecessors, (19), 11 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2023-04-02 22:52:08,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2023-04-02 22:52:08,415 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 51 [2023-04-02 22:52:08,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:52:08,415 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2023-04-02 22:52:08,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 9 states have call predecessors, (17), 5 states have call successors, (17) [2023-04-02 22:52:08,415 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2023-04-02 22:52:08,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-02 22:52:08,416 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:52:08,416 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 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] [2023-04-02 22:52:08,421 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-04-02 22:52:08,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:52:08,617 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:52:08,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:52:08,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1141095002, now seen corresponding path program 1 times [2023-04-02 22:52:08,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:52:08,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528989508] [2023-04-02 22:52:08,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:52:08,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:52:08,631 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:52:08,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [809315178] [2023-04-02 22:52:08,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:52:08,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:52:08,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:52:08,642 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) [2023-04-02 22:52:08,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 22:52:08,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:52:08,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 18 conjunts are in the unsatisfiable core [2023-04-02 22:52:08,713 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:52:08,763 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 41 proven. 5 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-04-02 22:52:08,763 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:52:08,862 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 41 proven. 5 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-04-02 22:52:08,862 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:52:08,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528989508] [2023-04-02 22:52:08,862 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:52:08,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809315178] [2023-04-02 22:52:08,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809315178] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:52:08,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [41218817] [2023-04-02 22:52:08,866 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-04-02 22:52:08,866 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:52:08,866 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:52:08,866 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:52:08,867 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:52:08,875 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:52:09,498 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2023-04-02 22:52:09,500 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 9 for LOIs [2023-04-02 22:52:09,501 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:52:09,503 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:52:10,342 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3335#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 22:52:10,342 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:52:10,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:52:10,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2023-04-02 22:52:10,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842617034] [2023-04-02 22:52:10,342 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:52:10,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 22:52:10,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:52:10,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 22:52:10,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2023-04-02 22:52:10,343 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand has 12 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2023-04-02 22:52:10,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:52:10,485 INFO L93 Difference]: Finished difference Result 81 states and 87 transitions. [2023-04-02 22:52:10,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 22:52:10,486 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) Word has length 62 [2023-04-02 22:52:10,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:52:10,487 INFO L225 Difference]: With dead ends: 81 [2023-04-02 22:52:10,487 INFO L226 Difference]: Without dead ends: 69 [2023-04-02 22:52:10,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 151 SyntacticMatches, 10 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2023-04-02 22:52:10,489 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 11 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 22:52:10,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 114 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 22:52:10,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-04-02 22:52:10,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2023-04-02 22:52:10,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 40 states have (on average 1.025) internal successors, (41), 41 states have internal predecessors, (41), 17 states have call successors, (17), 12 states have call predecessors, (17), 11 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-02 22:52:10,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2023-04-02 22:52:10,507 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 62 [2023-04-02 22:52:10,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:52:10,507 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2023-04-02 22:52:10,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2023-04-02 22:52:10,507 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2023-04-02 22:52:10,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-02 22:52:10,509 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:52:10,509 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:52:10,513 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-04-02 22:52:10,714 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,SelfDestructingSolverStorable8 [2023-04-02 22:52:10,714 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:52:10,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:52:10,714 INFO L85 PathProgramCache]: Analyzing trace with hash 834324404, now seen corresponding path program 4 times [2023-04-02 22:52:10,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:52:10,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359788085] [2023-04-02 22:52:10,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:52:10,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:52:10,721 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:52:10,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [837628815] [2023-04-02 22:52:10,721 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 22:52:10,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:52:10,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:52:10,722 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) [2023-04-02 22:52:10,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-02 22:52:10,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:52:10,784 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 51 conjunts are in the unsatisfiable core [2023-04-02 22:52:10,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:52:13,122 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 65 proven. 30 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2023-04-02 22:52:13,123 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:52:21,099 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 63 proven. 29 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-04-02 22:52:21,099 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:52:21,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359788085] [2023-04-02 22:52:21,100 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:52:21,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837628815] [2023-04-02 22:52:21,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837628815] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:52:21,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1247106386] [2023-04-02 22:52:21,105 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-02 22:52:21,105 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:52:21,105 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:52:21,106 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:52:21,106 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:52:21,135 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:52:21,684 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2023-04-02 22:52:21,686 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 9 for LOIs [2023-04-02 22:52:21,687 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:52:21,689 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:52:32,348 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4073#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 22:52:32,348 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:52:32,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:52:32,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2023-04-02 22:52:32,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222932553] [2023-04-02 22:52:32,349 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:52:32,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-02 22:52:32,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:52:32,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-02 22:52:32,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1098, Unknown=0, NotChecked=0, Total=1260 [2023-04-02 22:52:32,350 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand has 23 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 17 states have internal predecessors, (35), 14 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (29), 13 states have call predecessors, (29), 12 states have call successors, (29) [2023-04-02 22:52:37,444 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 [] [2023-04-02 22:52:37,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:52:37,993 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2023-04-02 22:52:37,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-02 22:52:37,994 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 17 states have internal predecessors, (35), 14 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (29), 13 states have call predecessors, (29), 12 states have call successors, (29) Word has length 80 [2023-04-02 22:52:37,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:52:37,994 INFO L225 Difference]: With dead ends: 86 [2023-04-02 22:52:37,994 INFO L226 Difference]: Without dead ends: 0 [2023-04-02 22:52:37,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 186 SyntacticMatches, 20 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=236, Invalid=1486, Unknown=0, NotChecked=0, Total=1722 [2023-04-02 22:52:37,995 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 23 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 46 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-04-02 22:52:37,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 142 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 455 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2023-04-02 22:52:37,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-04-02 22:52:37,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-04-02 22:52:37,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-04-02 22:52:37,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-04-02 22:52:37,996 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 80 [2023-04-02 22:52:37,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:52:37,996 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-04-02 22:52:37,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 17 states have internal predecessors, (35), 14 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (29), 13 states have call predecessors, (29), 12 states have call successors, (29) [2023-04-02 22:52:37,996 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-04-02 22:52:37,996 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-04-02 22:52:37,998 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-02 22:52:38,008 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-04-02 22:52:38,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-02 22:52:38,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-04-02 22:52:55,469 WARN L223 SmtUtils]: Spent 15.33s on a formula simplification. DAG size of input: 107 DAG size of output: 76 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2023-04-02 22:53:14,949 WARN L223 SmtUtils]: Spent 16.32s on a formula simplification. DAG size of input: 107 DAG size of output: 76 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2023-04-02 22:53:27,060 WARN L223 SmtUtils]: Spent 7.78s on a formula simplification. DAG size of input: 193 DAG size of output: 73 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2023-04-02 22:53:27,062 INFO L899 garLoopResultBuilder]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2023-04-02 22:53:27,062 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line 4) no Hoare annotation was computed. [2023-04-02 22:53:27,062 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 7 9) the Hoare annotation is: true [2023-04-02 22:53:27,062 INFO L899 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2023-04-02 22:53:27,062 INFO L895 garLoopResultBuilder]: At program point L35-2(lines 35 52) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (or (not (= (select .cse0 0) 48)) (not (= |#NULL.offset| 0)) (not (= 2 (select |#length| 1))) (not (= (select |#valid| 3) 1)) (not (= (select |#length| 3) 12)) (not (= (select |#valid| 0) 0)) (not (= (select .cse0 1) 0)) (not (= (select |#valid| 1) 1)) (not (= |#NULL.base| 0)) (not (= 10 (select |#length| 2))) (not (= (select |#valid| 2) 1)) (and (= main_~b~0 main_~a~0) (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0))) (<= 1 main_~x~0) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0))) (<= main_~x~0 5) (<= 1 main_~y~0) (= (* main_~p~0 main_~s~0) (+ (* main_~q~0 main_~r~0) 1)) (<= main_~y~0 5)) (<= |#StackHeapBarrier| 0))) [2023-04-02 22:53:27,062 INFO L895 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (or (not (= (select .cse0 0) 48)) (not (= |#NULL.offset| 0)) (not (= 2 (select |#length| 1))) (not (= (select |#valid| 3) 1)) (not (= (select |#length| 3) 12)) (not (= (select |#valid| 0) 0)) (not (= (select .cse0 1) 0)) (not (= (select |#valid| 1) 1)) (not (= |#NULL.base| 0)) (not (= 10 (select |#length| 2))) (and (<= 0 main_~y~0) (<= 1 main_~x~0) (<= main_~x~0 5) (<= main_~y~0 5)) (not (= (select |#valid| 2) 1)) (<= |#StackHeapBarrier| 0))) [2023-04-02 22:53:27,062 INFO L899 garLoopResultBuilder]: For program point mainEXIT(lines 18 59) no Hoare annotation was computed. [2023-04-02 22:53:27,062 INFO L895 garLoopResultBuilder]: At program point L56(line 56) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1)) (.cse1 (<= 1 main_~x~0)) (.cse2 (<= main_~x~0 5)) (.cse3 (<= 1 main_~y~0)) (.cse4 (<= main_~y~0 5))) (or (not (= (select .cse0 0) 48)) (not (= |#NULL.offset| 0)) (not (= 2 (select |#length| 1))) (not (= (select |#valid| 3) 1)) (and (= main_~b~0 main_~a~0) (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0))) .cse1 .cse2 .cse3 (= (* main_~p~0 main_~s~0) (+ (* main_~q~0 main_~r~0) 1)) .cse4) (not (= (select |#length| 3) 12)) (not (= (select |#valid| 0) 0)) (not (= (select .cse0 1) 0)) (not (= (select |#valid| 1) 1)) (not (= |#NULL.base| 0)) (not (= 10 (select |#length| 2))) (and (= main_~r~0 0) .cse1 (= main_~s~0 1) .cse2 (= main_~b~0 main_~y~0) (= main_~q~0 0) .cse3 (= main_~a~0 main_~x~0) .cse4 (= main_~p~0 1)) (not (= (select |#valid| 2) 1)) (<= |#StackHeapBarrier| 0))) [2023-04-02 22:53:27,063 INFO L895 garLoopResultBuilder]: At program point L54(line 54) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (or (not (= (select .cse0 0) 48)) (not (= |#NULL.offset| 0)) (not (= 2 (select |#length| 1))) (not (= (select |#valid| 3) 1)) (not (= (select |#length| 3) 12)) (not (= (select |#valid| 0) 0)) (not (= (select .cse0 1) 0)) (not (= (select |#valid| 1) 1)) (not (= |#NULL.base| 0)) (not (= 10 (select |#length| 2))) (not (= (select |#valid| 2) 1)) (and (= main_~b~0 main_~a~0) (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0))) (<= 1 main_~x~0) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0))) (<= main_~x~0 5) (<= 1 main_~y~0) (= (* main_~p~0 main_~s~0) (+ (* main_~q~0 main_~r~0) 1)) (<= main_~y~0 5)) (<= |#StackHeapBarrier| 0))) [2023-04-02 22:53:27,063 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 18 59) the Hoare annotation is: true [2023-04-02 22:53:27,063 INFO L899 garLoopResultBuilder]: For program point L38(lines 35 52) no Hoare annotation was computed. [2023-04-02 22:53:27,063 INFO L895 garLoopResultBuilder]: At program point L36(line 36) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (or (not (= (select .cse0 0) 48)) (not (= |#NULL.offset| 0)) (not (= 2 (select |#length| 1))) (not (= (select |#valid| 3) 1)) (not (= (select |#length| 3) 12)) (not (= (select |#valid| 0) 0)) (not (= (select .cse0 1) 0)) (not (= (select |#valid| 1) 1)) (and (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0))) (<= 1 main_~x~0) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0))) (<= main_~x~0 5) (<= 1 main_~y~0) (= (* main_~p~0 main_~s~0) (+ (* main_~q~0 main_~r~0) 1)) (<= main_~y~0 5)) (not (= |#NULL.base| 0)) (not (= 10 (select |#length| 2))) (not (= (select |#valid| 2) 1)) (<= |#StackHeapBarrier| 0))) [2023-04-02 22:53:27,063 INFO L895 garLoopResultBuilder]: At program point L36-1(line 36) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (or (not (= (select .cse0 0) 48)) (not (= |#NULL.offset| 0)) (not (= 2 (select |#length| 1))) (not (= (select |#valid| 3) 1)) (not (= (select |#length| 3) 12)) (not (= (select |#valid| 0) 0)) (not (= (select .cse0 1) 0)) (not (= (select |#valid| 1) 1)) (and (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0))) (<= 1 main_~x~0) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0))) (<= main_~x~0 5) (<= 1 main_~y~0) (= (* main_~p~0 main_~s~0) (+ (* main_~q~0 main_~r~0) 1)) (<= main_~y~0 5)) (not (= |#NULL.base| 0)) (not (= 10 (select |#length| 2))) (not (= (select |#valid| 2) 1)) (<= |#StackHeapBarrier| 0))) [2023-04-02 22:53:27,063 INFO L899 garLoopResultBuilder]: For program point L26(line 26) no Hoare annotation was computed. [2023-04-02 22:53:27,063 INFO L899 garLoopResultBuilder]: For program point L57(line 57) no Hoare annotation was computed. [2023-04-02 22:53:27,063 INFO L895 garLoopResultBuilder]: At program point L24(line 24) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (or (not (= (select .cse0 0) 48)) (not (= |#NULL.offset| 0)) (not (= 2 (select |#length| 1))) (not (= (select |#valid| 3) 1)) (and (<= main_~y~0 2147483647) (<= 0 main_~x~0) (<= main_~x~0 5) (<= 0 (+ main_~y~0 2147483648))) (not (= (select |#length| 3) 12)) (not (= (select |#valid| 0) 0)) (not (= (select .cse0 1) 0)) (not (= (select |#valid| 1) 1)) (not (= |#NULL.base| 0)) (not (= 10 (select |#length| 2))) (not (= (select |#valid| 2) 1)) (<= |#StackHeapBarrier| 0))) [2023-04-02 22:53:27,063 INFO L895 garLoopResultBuilder]: At program point L24-1(line 24) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (or (not (= (select .cse0 0) 48)) (not (= |#NULL.offset| 0)) (not (= 2 (select |#length| 1))) (not (= (select |#valid| 3) 1)) (not (= (select |#length| 3) 12)) (not (= (select |#valid| 0) 0)) (not (= (select .cse0 1) 0)) (not (= (select |#valid| 1) 1)) (and (<= 0 main_~y~0) (<= 0 main_~x~0) (<= main_~x~0 5) (<= main_~y~0 5)) (not (= |#NULL.base| 0)) (not (= 10 (select |#length| 2))) (not (= (select |#valid| 2) 1)) (<= |#StackHeapBarrier| 0))) [2023-04-02 22:53:27,063 INFO L895 garLoopResultBuilder]: At program point L55(line 55) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1)) (.cse1 (<= 1 main_~x~0)) (.cse2 (<= main_~x~0 5)) (.cse3 (<= 1 main_~y~0)) (.cse4 (<= main_~y~0 5))) (or (not (= (select .cse0 0) 48)) (not (= |#NULL.offset| 0)) (not (= 2 (select |#length| 1))) (not (= (select |#valid| 3) 1)) (and (= main_~b~0 main_~a~0) (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0))) .cse1 .cse2 .cse3 (= (* main_~p~0 main_~s~0) (+ (* main_~q~0 main_~r~0) 1)) .cse4) (not (= (select |#length| 3) 12)) (not (= (select |#valid| 0) 0)) (not (= (select .cse0 1) 0)) (not (= (select |#valid| 1) 1)) (not (= |#NULL.base| 0)) (not (= 10 (select |#length| 2))) (and (= main_~r~0 0) .cse1 (= main_~s~0 1) .cse2 (= main_~b~0 main_~y~0) (= main_~q~0 0) .cse3 (= main_~a~0 main_~x~0) .cse4 (= main_~p~0 1)) (not (= (select |#valid| 2) 1)) (<= |#StackHeapBarrier| 0))) [2023-04-02 22:53:27,063 INFO L895 garLoopResultBuilder]: At program point L22(line 22) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (or (not (= (select .cse0 0) 48)) (not (= |#NULL.offset| 0)) (not (= 2 (select |#length| 1))) (and (<= main_~x~0 2147483647) (<= 0 (+ main_~x~0 2147483648))) (not (= (select |#valid| 3) 1)) (not (= (select |#length| 3) 12)) (not (= (select |#valid| 0) 0)) (not (= (select .cse0 1) 0)) (not (= (select |#valid| 1) 1)) (not (= |#NULL.base| 0)) (not (= 10 (select |#length| 2))) (not (= (select |#valid| 2) 1)) (<= |#StackHeapBarrier| 0))) [2023-04-02 22:53:27,064 INFO L899 garLoopResultBuilder]: For program point L22-1(line 22) no Hoare annotation was computed. [2023-04-02 22:53:27,064 INFO L895 garLoopResultBuilder]: At program point L43-2(lines 35 52) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (or (not (= (select .cse0 0) 48)) (not (= |#NULL.offset| 0)) (not (= 2 (select |#length| 1))) (not (= (select |#valid| 3) 1)) (not (= (select |#length| 3) 12)) (not (= (select |#valid| 0) 0)) (not (= (select .cse0 1) 0)) (not (= (select |#valid| 1) 1)) (and (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0))) (<= 1 main_~x~0) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0))) (<= main_~x~0 5) (<= 1 main_~y~0) (= (* main_~p~0 main_~s~0) (+ (* main_~q~0 main_~r~0) 1)) (<= main_~y~0 5)) (not (= |#NULL.base| 0)) (not (= 10 (select |#length| 2))) (not (= (select |#valid| 2) 1)) (<= |#StackHeapBarrier| 0))) [2023-04-02 22:53:27,064 INFO L895 garLoopResultBuilder]: At program point L37(line 37) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (or (not (= (select .cse0 0) 48)) (not (= |#NULL.offset| 0)) (not (= 2 (select |#length| 1))) (not (= (select |#valid| 3) 1)) (not (= (select |#length| 3) 12)) (not (= (select |#valid| 0) 0)) (not (= (select .cse0 1) 0)) (not (= (select |#valid| 1) 1)) (and (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0))) (<= 1 main_~x~0) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0))) (<= main_~x~0 5) (<= 1 main_~y~0) (= (* main_~p~0 main_~s~0) (+ (* main_~q~0 main_~r~0) 1)) (<= main_~y~0 5)) (not (= |#NULL.base| 0)) (not (= 10 (select |#length| 2))) (not (= (select |#valid| 2) 1)) (<= |#StackHeapBarrier| 0))) [2023-04-02 22:53:27,064 INFO L895 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2023-04-02 22:53:27,064 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2023-04-02 22:53:27,064 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-04-02 22:53:27,064 INFO L895 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (and (= (select |#length| 3) 12) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select .cse0 0) 48) (= 10 (select |#length| 2)) (= (select .cse0 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) [2023-04-02 22:53:27,064 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-04-02 22:53:27,064 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: true [2023-04-02 22:53:27,064 INFO L899 garLoopResultBuilder]: For program point L12(lines 12 13) no Hoare annotation was computed. [2023-04-02 22:53:27,064 INFO L899 garLoopResultBuilder]: For program point L11(lines 11 14) no Hoare annotation was computed. [2023-04-02 22:53:27,064 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 10 16) no Hoare annotation was computed. [2023-04-02 22:53:27,064 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 10 16) the Hoare annotation is: true [2023-04-02 22:53:27,064 INFO L899 garLoopResultBuilder]: For program point L11-2(lines 10 16) no Hoare annotation was computed. [2023-04-02 22:53:27,064 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2023-04-02 22:53:27,066 INFO L445 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1, 1, 1, 1] [2023-04-02 22:53:27,067 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-02 22:53:27,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.04 10:53:27 BoogieIcfgContainer [2023-04-02 22:53:27,081 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-02 22:53:27,082 INFO L158 Benchmark]: Toolchain (without parser) took 93481.66ms. Allocated memory was 314.6MB in the beginning and 707.8MB in the end (delta: 393.2MB). Free memory was 273.8MB in the beginning and 364.9MB in the end (delta: -91.1MB). Peak memory consumption was 421.1MB. Max. memory is 8.0GB. [2023-04-02 22:53:27,082 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 196.1MB. Free memory is still 141.6MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-02 22:53:27,083 INFO L158 Benchmark]: CACSL2BoogieTranslator took 130.16ms. Allocated memory is still 314.6MB. Free memory was 273.2MB in the beginning and 262.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-04-02 22:53:27,084 INFO L158 Benchmark]: Boogie Preprocessor took 21.65ms. Allocated memory is still 314.6MB. Free memory was 262.7MB in the beginning and 261.3MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-04-02 22:53:27,085 INFO L158 Benchmark]: RCFGBuilder took 265.14ms. Allocated memory is still 314.6MB. Free memory was 261.3MB in the beginning and 247.0MB in the end (delta: 14.3MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2023-04-02 22:53:27,085 INFO L158 Benchmark]: TraceAbstraction took 93061.39ms. Allocated memory was 314.6MB in the beginning and 707.8MB in the end (delta: 393.2MB). Free memory was 246.4MB in the beginning and 364.9MB in the end (delta: -118.5MB). Peak memory consumption was 393.9MB. Max. memory is 8.0GB. [2023-04-02 22:53:27,087 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 196.1MB. Free memory is still 141.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 130.16ms. Allocated memory is still 314.6MB. Free memory was 273.2MB in the beginning and 262.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 21.65ms. Allocated memory is still 314.6MB. Free memory was 262.7MB in the beginning and 261.3MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 265.14ms. Allocated memory is still 314.6MB. Free memory was 261.3MB in the beginning and 247.0MB in the end (delta: 14.3MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * TraceAbstraction took 93061.39ms. Allocated memory was 314.6MB in the beginning and 707.8MB in the end (delta: 393.2MB). Free memory was 246.4MB in the beginning and 364.9MB in the end (delta: -118.5MB). Peak memory consumption was 393.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 93.0s, OverallIterations: 10, TraceHistogramMax: 11, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 11.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 48.9s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 246 SdHoareTripleChecker+Valid, 6.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 212 mSDsluCounter, 885 SdHoareTripleChecker+Invalid, 6.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 652 mSDsCounter, 317 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1850 IncrementalHoareTripleChecker+Invalid, 2169 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 317 mSolverCounterUnsat, 233 mSDtfsCounter, 1850 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1141 GetRequests, 860 SyntacticMatches, 54 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2254 ImplicationChecksByTransitivity, 21.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred in iteration=8, InterpolantAutomatonStates: 102, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 22 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 18 LocationsWithAnnotation, 53 PreInvPairs, 85 NumberOfFragments, 1336 HoareAnnotationTreeSize, 53 FomulaSimplifications, 8256 FormulaSimplificationTreeSizeReduction, 0.9s HoareSimplificationTime, 18 FomulaSimplificationsInter, 8940 FormulaSimplificationTreeSizeReductionInter, 47.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 12.1s InterpolantComputationTime, 442 NumberOfCodeBlocks, 422 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 751 ConstructedInterpolants, 0 QuantifiedInterpolants, 6544 SizeOfPredicates, 48 NumberOfNonLiveVariables, 1191 ConjunctsInSsa, 212 ConjunctsInUnsatCore, 16 InterpolantComputations, 3 PerfectInterpolantSequences, 1030/1148 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 0.5s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 10, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 55, DAG_INTERPRETER_EARLY_EXITS: 2, TOOLS_POST_APPLICATIONS: 31, TOOLS_POST_TIME: 0.0s, TOOLS_POST_CALL_APPLICATIONS: 49, TOOLS_POST_CALL_TIME: 0.2s, TOOLS_POST_RETURN_APPLICATIONS: 30, TOOLS_POST_RETURN_TIME: 0.1s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 110, TOOLS_QUANTIFIERELIM_TIME: 0.3s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.0s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 146, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 53, DOMAIN_JOIN_TIME: 0.1s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 55, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 30, CALL_SUMMARIZER_CACHE_MISSES: 6, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 615, DAG_COMPRESSION_RETAINED_NODES: 162, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: (((((((((((!(unknown-#memory_int-unknown[1][0] == 48) || !(#NULL == 0)) || !(2 == unknown-#length-unknown[1])) || !(\valid[3] == 1)) || !(unknown-#length-unknown[3] == 12)) || !(\valid[0] == 0)) || !(unknown-#memory_int-unknown[1][1] == 0)) || !(\valid[1] == 1)) || ((((((b == q * x + y * s && 1 <= x) && a == y * r + p * x) && x <= 5) && 1 <= y) && p * s == q * r + 1) && y <= 5)) || !(#NULL == 0)) || !(10 == unknown-#length-unknown[2])) || !(\valid[2] == 1)) || unknown-#StackHeapBarrier-unknown <= 0 RESULT: Ultimate proved your program to be correct! [2023-04-02 22:53:27,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...