/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/array-patterns/array18_pattern.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 20:54:22,962 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 20:54:22,964 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 20:54:23,000 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 20:54:23,000 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 20:54:23,003 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 20:54:23,006 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 20:54:23,008 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 20:54:23,010 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 20:54:23,014 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 20:54:23,015 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 20:54:23,016 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 20:54:23,017 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 20:54:23,019 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 20:54:23,020 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 20:54:23,021 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 20:54:23,022 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 20:54:23,022 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 20:54:23,024 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 20:54:23,029 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 20:54:23,030 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 20:54:23,031 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 20:54:23,032 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 20:54:23,033 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 20:54:23,041 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 20:54:23,041 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 20:54:23,041 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 20:54:23,043 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 20:54:23,043 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 20:54:23,044 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 20:54:23,044 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 20:54:23,045 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 20:54:23,046 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 20:54:23,047 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 20:54:23,047 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 20:54:23,048 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 20:54:23,048 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 20:54:23,048 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 20:54:23,048 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 20:54:23,049 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 20:54:23,050 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 20:54:23,051 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-03-31 20:54:23,080 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 20:54:23,080 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 20:54:23,080 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 20:54:23,081 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 20:54:23,081 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 20:54:23,081 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 20:54:23,081 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 20:54:23,081 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 20:54:23,082 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 20:54:23,082 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 20:54:23,082 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 20:54:23,082 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 20:54:23,082 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 20:54:23,082 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 20:54:23,082 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 20:54:23,082 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 20:54:23,083 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 20:54:23,083 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 20:54:23,083 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 20:54:23,083 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 20:54:23,083 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 20:54:23,083 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 20:54:23,083 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 20:54:23,083 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 20:54:23,084 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 20:54:23,084 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 20:54:23,084 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 20:54:23,084 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 20:54:23,084 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 20:54:23,084 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 20:54:23,085 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 20:54:23,085 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 20:54:23,085 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 20:54:23,085 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 20:54:23,085 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 20:54:23,085 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 20:54:23,086 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 20:54:23,086 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 20:54:23,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 20:54:23,086 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 20:54:23,086 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 20:54:23,086 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 20:54:23,318 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 20:54:23,339 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 20:54:23,341 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 20:54:23,342 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 20:54:23,343 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 20:54:23,344 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array18_pattern.c [2023-03-31 20:54:24,493 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 20:54:24,688 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 20:54:24,688 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array18_pattern.c [2023-03-31 20:54:24,693 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a7fe95ba/d48e218b6c9b4d02abf519d3c1bfa7a8/FLAG88251c642 [2023-03-31 20:54:24,709 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a7fe95ba/d48e218b6c9b4d02abf519d3c1bfa7a8 [2023-03-31 20:54:24,711 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 20:54:24,713 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 20:54:24,715 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 20:54:24,715 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 20:54:24,718 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 20:54:24,718 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 08:54:24" (1/1) ... [2023-03-31 20:54:24,720 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66924119 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:54:24, skipping insertion in model container [2023-03-31 20:54:24,720 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 08:54:24" (1/1) ... [2023-03-31 20:54:24,726 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 20:54:24,744 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 20:54:24,876 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array18_pattern.c[1444,1457] [2023-03-31 20:54:24,915 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 20:54:24,922 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 20:54:24,930 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array18_pattern.c[1444,1457] [2023-03-31 20:54:24,938 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 20:54:24,949 INFO L208 MainTranslator]: Completed translation [2023-03-31 20:54:24,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:54:24 WrapperNode [2023-03-31 20:54:24,950 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 20:54:24,950 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 20:54:24,950 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 20:54:24,951 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 20:54:24,963 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:54:24" (1/1) ... [2023-03-31 20:54:24,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:54:24" (1/1) ... [2023-03-31 20:54:24,968 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:54:24" (1/1) ... [2023-03-31 20:54:24,968 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:54:24" (1/1) ... [2023-03-31 20:54:24,974 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:54:24" (1/1) ... [2023-03-31 20:54:24,978 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:54:24" (1/1) ... [2023-03-31 20:54:24,979 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:54:24" (1/1) ... [2023-03-31 20:54:24,980 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:54:24" (1/1) ... [2023-03-31 20:54:24,982 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 20:54:24,983 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 20:54:24,983 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 20:54:24,983 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 20:54:24,984 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:54:24" (1/1) ... [2023-03-31 20:54:24,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 20:54:24,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:54:25,018 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 20:54:25,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 20:54:25,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 20:54:25,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 20:54:25,055 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 20:54:25,055 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-31 20:54:25,055 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 20:54:25,055 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 20:54:25,055 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 20:54:25,055 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 20:54:25,055 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 20:54:25,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 20:54:25,055 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-31 20:54:25,056 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 20:54:25,056 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 20:54:25,056 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2023-03-31 20:54:25,056 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 20:54:25,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-31 20:54:25,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 20:54:25,056 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 20:54:25,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 20:54:25,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 20:54:25,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 20:54:25,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 20:54:25,125 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 20:54:25,127 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 20:54:25,427 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 20:54:25,525 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 20:54:25,525 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-03-31 20:54:25,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 08:54:25 BoogieIcfgContainer [2023-03-31 20:54:25,527 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 20:54:25,529 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 20:54:25,529 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 20:54:25,532 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 20:54:25,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 08:54:24" (1/3) ... [2023-03-31 20:54:25,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8dcc853 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 08:54:25, skipping insertion in model container [2023-03-31 20:54:25,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:54:24" (2/3) ... [2023-03-31 20:54:25,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8dcc853 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 08:54:25, skipping insertion in model container [2023-03-31 20:54:25,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 08:54:25" (3/3) ... [2023-03-31 20:54:25,534 INFO L112 eAbstractionObserver]: Analyzing ICFG array18_pattern.c [2023-03-31 20:54:25,549 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 20:54:25,549 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 20:54:25,602 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 20:54:25,608 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;@317bde7f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 20:54:25,609 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 20:54:25,613 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 20:54:25,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-03-31 20:54:25,623 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:54:25,624 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:54:25,625 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:54:25,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:54:25,630 INFO L85 PathProgramCache]: Analyzing trace with hash -551539435, now seen corresponding path program 1 times [2023-03-31 20:54:25,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:54:25,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006587772] [2023-03-31 20:54:25,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:54:25,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:54:25,723 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:54:25,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [848801134] [2023-03-31 20:54:25,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:54:25,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:54:25,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:54:25,727 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:54:25,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 20:54:25,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:54:25,827 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 1 conjunts are in the unsatisfiable core [2023-03-31 20:54:25,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:54:25,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:54:25,863 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 20:54:25,863 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:54:25,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006587772] [2023-03-31 20:54:25,864 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:54:25,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848801134] [2023-03-31 20:54:25,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848801134] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 20:54:25,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 20:54:25,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-03-31 20:54:25,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322141409] [2023-03-31 20:54:25,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 20:54:25,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-03-31 20:54:25,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:54:25,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-03-31 20:54:25,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-31 20:54:25,913 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 20:54:25,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:54:25,950 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2023-03-31 20:54:25,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-03-31 20:54:25,952 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2023-03-31 20:54:25,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:54:25,959 INFO L225 Difference]: With dead ends: 44 [2023-03-31 20:54:25,959 INFO L226 Difference]: Without dead ends: 24 [2023-03-31 20:54:25,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-31 20:54:25,967 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:54:25,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:54:25,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-03-31 20:54:26,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-03-31 20:54:26,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 6 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 20:54:26,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2023-03-31 20:54:26,006 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 17 [2023-03-31 20:54:26,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:54:26,008 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2023-03-31 20:54:26,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 20:54:26,008 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2023-03-31 20:54:26,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-03-31 20:54:26,010 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:54:26,010 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:54:26,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 20:54:26,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-03-31 20:54:26,216 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:54:26,217 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:54:26,217 INFO L85 PathProgramCache]: Analyzing trace with hash 462675951, now seen corresponding path program 1 times [2023-03-31 20:54:26,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:54:26,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347439350] [2023-03-31 20:54:26,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:54:26,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:54:26,247 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:54:26,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1132010339] [2023-03-31 20:54:26,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:54:26,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:54:26,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:54:26,252 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:54:26,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 20:54:26,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:54:26,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-31 20:54:26,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:54:26,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 20:54:26,418 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 20:54:26,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:54:26,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347439350] [2023-03-31 20:54:26,422 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:54:26,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132010339] [2023-03-31 20:54:26,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132010339] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 20:54:26,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 20:54:26,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 20:54:26,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819907047] [2023-03-31 20:54:26,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 20:54:26,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 20:54:26,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:54:26,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 20:54:26,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 20:54:26,424 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 20:54:26,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:54:26,489 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2023-03-31 20:54:26,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 20:54:26,490 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2023-03-31 20:54:26,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:54:26,491 INFO L225 Difference]: With dead ends: 31 [2023-03-31 20:54:26,491 INFO L226 Difference]: Without dead ends: 26 [2023-03-31 20:54:26,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-31 20:54:26,493 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 7 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:54:26,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 68 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:54:26,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-03-31 20:54:26,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-03-31 20:54:26,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 20:54:26,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2023-03-31 20:54:26,500 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 25 [2023-03-31 20:54:26,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:54:26,501 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2023-03-31 20:54:26,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 20:54:26,501 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2023-03-31 20:54:26,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-03-31 20:54:26,502 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:54:26,502 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-31 20:54:26,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 20:54:26,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-03-31 20:54:26,703 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:54:26,704 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:54:26,704 INFO L85 PathProgramCache]: Analyzing trace with hash 727425456, now seen corresponding path program 1 times [2023-03-31 20:54:26,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:54:26,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093603232] [2023-03-31 20:54:26,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:54:26,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:54:26,721 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:54:26,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [301006568] [2023-03-31 20:54:26,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:54:26,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:54:26,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:54:26,723 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:54:26,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 20:54:26,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:54:26,829 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 20:54:26,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:54:26,891 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-31 20:54:26,891 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 20:54:26,891 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:54:26,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093603232] [2023-03-31 20:54:26,891 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:54:26,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301006568] [2023-03-31 20:54:26,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301006568] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 20:54:26,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 20:54:26,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 20:54:26,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734162598] [2023-03-31 20:54:26,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 20:54:26,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 20:54:26,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:54:26,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 20:54:26,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 20:54:26,893 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 20:54:26,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:54:26,977 INFO L93 Difference]: Finished difference Result 49 states and 64 transitions. [2023-03-31 20:54:26,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 20:54:26,978 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2023-03-31 20:54:26,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:54:26,979 INFO L225 Difference]: With dead ends: 49 [2023-03-31 20:54:26,979 INFO L226 Difference]: Without dead ends: 31 [2023-03-31 20:54:26,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-03-31 20:54:26,980 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 12 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:54:26,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 52 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:54:26,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-03-31 20:54:26,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2023-03-31 20:54:26,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 6 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 20:54:26,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2023-03-31 20:54:26,986 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 28 [2023-03-31 20:54:26,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:54:26,987 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2023-03-31 20:54:26,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 20:54:26,987 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2023-03-31 20:54:26,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-03-31 20:54:26,988 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:54:26,988 INFO L195 NwaCegarLoop]: trace histogram [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, 1] [2023-03-31 20:54:26,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 20:54:27,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:54:27,193 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:54:27,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:54:27,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1455674232, now seen corresponding path program 1 times [2023-03-31 20:54:27,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:54:27,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215191713] [2023-03-31 20:54:27,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:54:27,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:54:27,211 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:54:27,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1981507540] [2023-03-31 20:54:27,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:54:27,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:54:27,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:54:27,221 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:54:27,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 20:54:27,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:54:27,303 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 20:54:27,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:54:27,349 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 20:54:27,349 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 20:54:27,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:54:27,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215191713] [2023-03-31 20:54:27,350 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:54:27,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981507540] [2023-03-31 20:54:27,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981507540] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 20:54:27,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 20:54:27,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 20:54:27,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673961312] [2023-03-31 20:54:27,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 20:54:27,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 20:54:27,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:54:27,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 20:54:27,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 20:54:27,352 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 20:54:27,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:54:27,410 INFO L93 Difference]: Finished difference Result 48 states and 63 transitions. [2023-03-31 20:54:27,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 20:54:27,410 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2023-03-31 20:54:27,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:54:27,411 INFO L225 Difference]: With dead ends: 48 [2023-03-31 20:54:27,412 INFO L226 Difference]: Without dead ends: 29 [2023-03-31 20:54:27,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 20:54:27,421 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 12 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:54:27,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 48 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:54:27,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-03-31 20:54:27,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2023-03-31 20:54:27,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 6 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 20:54:27,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2023-03-31 20:54:27,429 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 30 [2023-03-31 20:54:27,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:54:27,429 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2023-03-31 20:54:27,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 20:54:27,429 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2023-03-31 20:54:27,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-03-31 20:54:27,430 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:54:27,430 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1] [2023-03-31 20:54:27,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-31 20:54:27,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:54:27,636 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:54:27,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:54:27,637 INFO L85 PathProgramCache]: Analyzing trace with hash 969804685, now seen corresponding path program 1 times [2023-03-31 20:54:27,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:54:27,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603577806] [2023-03-31 20:54:27,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:54:27,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:54:27,676 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:54:27,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2018949942] [2023-03-31 20:54:27,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:54:27,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:54:27,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:54:27,680 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:54:27,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 20:54:27,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:54:27,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 41 conjunts are in the unsatisfiable core [2023-03-31 20:54:27,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:54:28,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 218 treesize of output 209 [2023-03-31 20:54:28,320 INFO L321 Elim1Store]: treesize reduction 321, result has 10.6 percent of original size [2023-03-31 20:54:28,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 262 treesize of output 368 [2023-03-31 20:54:28,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 20:54:28,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 20:54:28,562 INFO L173 IndexEqualityManager]: detected equality via solver [2023-03-31 20:54:28,565 INFO L173 IndexEqualityManager]: detected equality via solver [2023-03-31 20:54:28,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 3 [2023-03-31 20:54:28,955 INFO L321 Elim1Store]: treesize reduction 70, result has 4.1 percent of original size [2023-03-31 20:54:28,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 22 [2023-03-31 20:54:29,022 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 20:54:29,022 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:54:29,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 223 treesize of output 215 [2023-03-31 20:54:29,824 INFO L321 Elim1Store]: treesize reduction 214, result has 48.7 percent of original size [2023-03-31 20:54:29,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 271 treesize of output 499 [2023-03-31 20:54:50,515 WARN L223 SmtUtils]: Spent 6.42s on a formula simplification. DAG size of input: 86 DAG size of output: 43 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-03-31 20:54:50,516 INFO L321 Elim1Store]: treesize reduction 325, result has 27.3 percent of original size [2023-03-31 20:54:50,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 11 case distinctions, treesize of input 689 treesize of output 593 [2023-03-31 20:55:07,740 WARN L223 SmtUtils]: Spent 17.19s on a formula simplification. DAG size of input: 44 DAG size of output: 40 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-03-31 20:55:07,741 INFO L321 Elim1Store]: treesize reduction 8, result has 92.2 percent of original size [2023-03-31 20:55:07,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 569 treesize of output 424