/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/array-multidimensional/copy-partial-3-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 02:53:28,957 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 02:53:28,960 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 02:53:28,999 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 02:53:29,000 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 02:53:29,003 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 02:53:29,005 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 02:53:29,006 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 02:53:29,008 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 02:53:29,012 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 02:53:29,014 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 02:53:29,015 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 02:53:29,015 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 02:53:29,018 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 02:53:29,019 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 02:53:29,020 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 02:53:29,021 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 02:53:29,022 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 02:53:29,024 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 02:53:29,029 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 02:53:29,030 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 02:53:29,031 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 02:53:29,032 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 02:53:29,033 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 02:53:29,040 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 02:53:29,044 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 02:53:29,044 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 02:53:29,045 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 02:53:29,046 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 02:53:29,047 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 02:53:29,047 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 02:53:29,047 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 02:53:29,047 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 02:53:29,047 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 02:53:29,048 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 02:53:29,049 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 02:53:29,050 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 02:53:29,078 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 02:53:29,078 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 02:53:29,079 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 02:53:29,079 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 02:53:29,080 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 02:53:29,080 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 02:53:29,080 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 02:53:29,080 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 02:53:29,080 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 02:53:29,080 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 02:53:29,081 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 02:53:29,081 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 02:53:29,081 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 02:53:29,081 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 02:53:29,081 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 02:53:29,082 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 02:53:29,082 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 02:53:29,082 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 02:53:29,082 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 02:53:29,083 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 02:53:29,083 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 02:53:29,083 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 02:53:29,083 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 02:53:29,083 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 02:53:29,083 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 02:53:29,083 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 02:53:29,083 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 02:53:29,083 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 02:53:29,084 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 02:53:29,084 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 02:53:29,084 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 02:53:29,084 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 02:53:29,084 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 02:53:29,084 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 02:53:29,085 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 02:53:29,085 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 02:53:29,085 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 02:53:29,085 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 02:53:29,085 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 02:53:29,085 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 02:53:29,085 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 02:53:29,085 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 02:53:29,283 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 02:53:29,304 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 02:53:29,307 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 02:53:29,308 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 02:53:29,308 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 02:53:29,309 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c [2023-04-01 02:53:30,497 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 02:53:30,657 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 02:53:30,658 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c [2023-04-01 02:53:30,666 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11d533688/15be8d927c424327adf6072f8493bfb1/FLAGdf65ade50 [2023-04-01 02:53:30,677 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11d533688/15be8d927c424327adf6072f8493bfb1 [2023-04-01 02:53:30,679 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 02:53:30,680 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 02:53:30,681 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 02:53:30,681 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 02:53:30,684 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 02:53:30,685 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 02:53:30" (1/1) ... [2023-04-01 02:53:30,686 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a7f72fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:53:30, skipping insertion in model container [2023-04-01 02:53:30,686 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 02:53:30" (1/1) ... [2023-04-01 02:53:30,692 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 02:53:30,704 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 02:53:30,815 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-multidimensional/copy-partial-3-u.c[414,427] [2023-04-01 02:53:30,834 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 02:53:30,841 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 02:53:30,850 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-multidimensional/copy-partial-3-u.c[414,427] [2023-04-01 02:53:30,864 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 02:53:30,876 INFO L208 MainTranslator]: Completed translation [2023-04-01 02:53:30,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:53:30 WrapperNode [2023-04-01 02:53:30,877 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 02:53:30,877 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 02:53:30,877 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 02:53:30,878 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 02:53:30,885 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:53:30" (1/1) ... [2023-04-01 02:53:30,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:53:30" (1/1) ... [2023-04-01 02:53:30,891 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:53:30" (1/1) ... [2023-04-01 02:53:30,892 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:53:30" (1/1) ... [2023-04-01 02:53:30,898 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:53:30" (1/1) ... [2023-04-01 02:53:30,904 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:53:30" (1/1) ... [2023-04-01 02:53:30,905 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:53:30" (1/1) ... [2023-04-01 02:53:30,906 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:53:30" (1/1) ... [2023-04-01 02:53:30,908 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 02:53:30,909 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 02:53:30,909 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 02:53:30,909 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 02:53:30,910 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:53:30" (1/1) ... [2023-04-01 02:53:30,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 02:53:30,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:53:30,950 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 02:53:30,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 02:53:30,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 02:53:30,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 02:53:30,980 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 02:53:30,985 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 02:53:30,985 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 02:53:30,985 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 02:53:30,985 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 02:53:30,985 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 02:53:30,985 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 02:53:30,986 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 02:53:30,986 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 02:53:30,986 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 02:53:30,986 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 02:53:30,986 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 02:53:30,986 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 02:53:30,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 02:53:30,986 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 02:53:30,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 02:53:30,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 02:53:30,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 02:53:30,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 02:53:31,045 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 02:53:31,047 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 02:53:31,291 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 02:53:31,347 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 02:53:31,347 INFO L302 CfgBuilder]: Removed 12 assume(true) statements. [2023-04-01 02:53:31,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 02:53:31 BoogieIcfgContainer [2023-04-01 02:53:31,350 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 02:53:31,352 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 02:53:31,352 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 02:53:31,355 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 02:53:31,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 02:53:30" (1/3) ... [2023-04-01 02:53:31,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@165cbd73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 02:53:31, skipping insertion in model container [2023-04-01 02:53:31,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:53:30" (2/3) ... [2023-04-01 02:53:31,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@165cbd73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 02:53:31, skipping insertion in model container [2023-04-01 02:53:31,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 02:53:31" (3/3) ... [2023-04-01 02:53:31,357 INFO L112 eAbstractionObserver]: Analyzing ICFG copy-partial-3-u.c [2023-04-01 02:53:31,373 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 02:53:31,373 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 02:53:31,422 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 02:53:31,427 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;@2e847fa8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 02:53:31,427 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 02:53:31,430 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 23 states have internal predecessors, (36), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 02:53:31,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-01 02:53:31,436 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:53:31,437 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:53:31,437 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:53:31,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:53:31,442 INFO L85 PathProgramCache]: Analyzing trace with hash -2130177090, now seen corresponding path program 1 times [2023-04-01 02:53:31,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:53:31,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758799000] [2023-04-01 02:53:31,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:53:31,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:53:31,523 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:53:31,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [461724721] [2023-04-01 02:53:31,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:53:31,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:53:31,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:53:31,528 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:53:31,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 02:53:31,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:53:31,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 02:53:31,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:53:31,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:53:31,766 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 02:53:31,767 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:53:31,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758799000] [2023-04-01 02:53:31,767 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 02:53:31,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461724721] [2023-04-01 02:53:31,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461724721] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:53:31,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 02:53:31,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 02:53:31,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275017254] [2023-04-01 02:53:31,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:53:31,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 02:53:31,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:53:31,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 02:53:31,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 02:53:31,831 INFO L87 Difference]: Start difference. First operand has 32 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 23 states have internal predecessors, (36), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:53:31,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:53:31,977 INFO L93 Difference]: Finished difference Result 66 states and 102 transitions. [2023-04-01 02:53:31,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 02:53:31,980 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2023-04-01 02:53:31,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:53:31,987 INFO L225 Difference]: With dead ends: 66 [2023-04-01 02:53:31,987 INFO L226 Difference]: Without dead ends: 43 [2023-04-01 02:53:31,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 02:53:31,997 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 44 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:53:31,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 42 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:53:32,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-04-01 02:53:32,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2023-04-01 02:53:32,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 02:53:32,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 44 transitions. [2023-04-01 02:53:32,035 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 44 transitions. Word has length 19 [2023-04-01 02:53:32,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:53:32,036 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 44 transitions. [2023-04-01 02:53:32,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:53:32,037 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 44 transitions. [2023-04-01 02:53:32,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 02:53:32,038 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:53:32,039 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:53:32,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 02:53:32,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-01 02:53:32,244 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:53:32,245 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:53:32,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1165041297, now seen corresponding path program 1 times [2023-04-01 02:53:32,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:53:32,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275177189] [2023-04-01 02:53:32,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:53:32,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:53:32,267 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:53:32,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [680396601] [2023-04-01 02:53:32,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:53:32,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:53:32,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:53:32,273 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:53:32,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 02:53:32,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:53:32,346 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 02:53:32,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:53:32,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 02:53:32,373 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 02:53:32,373 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:53:32,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275177189] [2023-04-01 02:53:32,374 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 02:53:32,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680396601] [2023-04-01 02:53:32,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680396601] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:53:32,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 02:53:32,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 02:53:32,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265951038] [2023-04-01 02:53:32,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:53:32,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 02:53:32,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:53:32,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 02:53:32,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 02:53:32,377 INFO L87 Difference]: Start difference. First operand 32 states and 44 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:53:32,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:53:32,441 INFO L93 Difference]: Finished difference Result 65 states and 98 transitions. [2023-04-01 02:53:32,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 02:53:32,442 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2023-04-01 02:53:32,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:53:32,444 INFO L225 Difference]: With dead ends: 65 [2023-04-01 02:53:32,444 INFO L226 Difference]: Without dead ends: 43 [2023-04-01 02:53:32,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 02:53:32,445 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 32 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:53:32,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 35 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:53:32,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-04-01 02:53:32,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2023-04-01 02:53:32,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 02:53:32,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 46 transitions. [2023-04-01 02:53:32,455 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 46 transitions. Word has length 23 [2023-04-01 02:53:32,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:53:32,455 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 46 transitions. [2023-04-01 02:53:32,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:53:32,455 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 46 transitions. [2023-04-01 02:53:32,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 02:53:32,456 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:53:32,456 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 02:53:32,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 02:53:32,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-04-01 02:53:32,664 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:53:32,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:53:32,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1710877257, now seen corresponding path program 1 times [2023-04-01 02:53:32,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:53:32,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72480493] [2023-04-01 02:53:32,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:53:32,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:53:32,680 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:53:32,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [494587631] [2023-04-01 02:53:32,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:53:32,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:53:32,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:53:32,684 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:53:32,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 02:53:32,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:53:32,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 02:53:32,745 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:53:32,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 02:53:32,781 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 02:53:32,781 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:53:32,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72480493] [2023-04-01 02:53:32,781 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 02:53:32,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494587631] [2023-04-01 02:53:32,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494587631] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:53:32,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 02:53:32,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 02:53:32,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336078444] [2023-04-01 02:53:32,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:53:32,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 02:53:32,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:53:32,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 02:53:32,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 02:53:32,784 INFO L87 Difference]: Start difference. First operand 34 states and 46 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:53:32,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:53:32,869 INFO L93 Difference]: Finished difference Result 68 states and 100 transitions. [2023-04-01 02:53:32,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 02:53:32,870 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), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2023-04-01 02:53:32,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:53:32,872 INFO L225 Difference]: With dead ends: 68 [2023-04-01 02:53:32,872 INFO L226 Difference]: Without dead ends: 44 [2023-04-01 02:53:32,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 02:53:32,875 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 26 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:53:32,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 34 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:53:32,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-04-01 02:53:32,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2023-04-01 02:53:32,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 02:53:32,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 48 transitions. [2023-04-01 02:53:32,893 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 48 transitions. Word has length 25 [2023-04-01 02:53:32,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:53:32,894 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 48 transitions. [2023-04-01 02:53:32,895 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), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:53:32,895 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 48 transitions. [2023-04-01 02:53:32,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-01 02:53:32,896 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:53:32,896 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 02:53:32,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 02:53:33,101 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 [2023-04-01 02:53:33,102 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:53:33,102 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:53:33,103 INFO L85 PathProgramCache]: Analyzing trace with hash -2136346544, now seen corresponding path program 1 times [2023-04-01 02:53:33,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:53:33,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597307665] [2023-04-01 02:53:33,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:53:33,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:53:33,127 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:53:33,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1629685233] [2023-04-01 02:53:33,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:53:33,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:53:33,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:53:33,133 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) [2023-04-01 02:53:33,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 02:53:33,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:53:33,191 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 02:53:33,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:53:33,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 02:53:33,224 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:53:33,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 02:53:33,261 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:53:33,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597307665] [2023-04-01 02:53:33,261 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 02:53:33,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629685233] [2023-04-01 02:53:33,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629685233] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:53:33,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [136990754] [2023-04-01 02:53:33,279 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-04-01 02:53:33,279 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:53:33,282 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:53:33,286 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:53:33,287 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:53:33,349 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:53:34,429 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 36 for LOIs [2023-04-01 02:53:34,441 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:53:34,445 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:53:34,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [136990754] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:53:34,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 02:53:34,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [5, 5] total 23 [2023-04-01 02:53:34,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100568957] [2023-04-01 02:53:34,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:53:34,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 02:53:34,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:53:34,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 02:53:34,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2023-04-01 02:53:34,935 INFO L87 Difference]: Start difference. First operand 36 states and 48 transitions. Second operand has 17 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:53:36,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:53:36,803 INFO L93 Difference]: Finished difference Result 77 states and 112 transitions. [2023-04-01 02:53:36,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 02:53:36,804 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2023-04-01 02:53:36,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:53:36,804 INFO L225 Difference]: With dead ends: 77 [2023-04-01 02:53:36,805 INFO L226 Difference]: Without dead ends: 57 [2023-04-01 02:53:36,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=212, Invalid=978, Unknown=0, NotChecked=0, Total=1190 [2023-04-01 02:53:36,806 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 194 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 02:53:36,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 14 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 02:53:36,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-04-01 02:53:36,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 43. [2023-04-01 02:53:36,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 35 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 02:53:36,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 59 transitions. [2023-04-01 02:53:36,831 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 59 transitions. Word has length 26 [2023-04-01 02:53:36,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:53:36,831 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 59 transitions. [2023-04-01 02:53:36,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:53:36,831 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 59 transitions. [2023-04-01 02:53:36,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 02:53:36,832 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:53:36,833 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:53:36,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 02:53:37,038 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 [2023-04-01 02:53:37,039 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:53:37,039 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:53:37,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1159705126, now seen corresponding path program 1 times [2023-04-01 02:53:37,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:53:37,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108395267] [2023-04-01 02:53:37,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:53:37,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:53:37,051 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:53:37,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2117218601] [2023-04-01 02:53:37,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:53:37,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:53:37,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:53:37,053 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) [2023-04-01 02:53:37,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 02:53:37,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:53:37,106 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 02:53:37,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:53:37,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 02:53:37,135 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:53:37,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 02:53:37,165 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:53:37,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108395267] [2023-04-01 02:53:37,165 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 02:53:37,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117218601] [2023-04-01 02:53:37,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117218601] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:53:37,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1856004302] [2023-04-01 02:53:37,167 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-01 02:53:37,167 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:53:37,168 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:53:37,168 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:53:37,168 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:53:37,188 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:53:37,894 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-01 02:53:37,911 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 36 for LOIs [2023-04-01 02:53:37,917 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:53:37,925 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:53:38,639 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1353#(and (exists ((|v_main_~#B~0.base_BEFORE_CALL_6| Int) (|v_main_~#B~0.offset_BEFORE_CALL_6| Int) (|v_main_~#A~0.offset_BEFORE_CALL_6| Int) (|v_main_~#A~0.base_BEFORE_CALL_6| Int)) (not (= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_6|) |v_main_~#A~0.offset_BEFORE_CALL_6|) (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_6|) |v_main_~#B~0.offset_BEFORE_CALL_6|)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 02:53:38,639 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:53:38,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 02:53:38,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-04-01 02:53:38,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051834452] [2023-04-01 02:53:38,640 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 02:53:38,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 02:53:38,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:53:38,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 02:53:38,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2023-04-01 02:53:38,641 INFO L87 Difference]: Start difference. First operand 43 states and 59 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 02:53:38,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:53:38,842 INFO L93 Difference]: Finished difference Result 111 states and 173 transitions. [2023-04-01 02:53:38,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 02:53:38,842 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2023-04-01 02:53:38,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:53:38,843 INFO L225 Difference]: With dead ends: 111 [2023-04-01 02:53:38,843 INFO L226 Difference]: Without dead ends: 78 [2023-04-01 02:53:38,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2023-04-01 02:53:38,844 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 120 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:53:38,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 43 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:53:38,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-04-01 02:53:38,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 55. [2023-04-01 02:53:38,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 44 states have internal predecessors, (61), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 02:53:38,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 74 transitions. [2023-04-01 02:53:38,869 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 74 transitions. Word has length 29 [2023-04-01 02:53:38,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:53:38,870 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 74 transitions. [2023-04-01 02:53:38,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 02:53:38,870 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 74 transitions. [2023-04-01 02:53:38,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 02:53:38,871 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:53:38,871 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:53:38,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 02:53:39,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:53:39,081 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:53:39,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:53:39,082 INFO L85 PathProgramCache]: Analyzing trace with hash 967759059, now seen corresponding path program 2 times [2023-04-01 02:53:39,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:53:39,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864118517] [2023-04-01 02:53:39,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:53:39,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:53:39,108 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:53:39,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1114468348] [2023-04-01 02:53:39,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:53:39,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:53:39,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:53:39,110 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) [2023-04-01 02:53:39,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 02:53:39,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-04-01 02:53:39,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:53:39,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 02:53:39,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:53:39,218 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 02:53:39,219 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 02:53:39,219 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:53:39,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864118517] [2023-04-01 02:53:39,219 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 02:53:39,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114468348] [2023-04-01 02:53:39,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114468348] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:53:39,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 02:53:39,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 02:53:39,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848010934] [2023-04-01 02:53:39,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:53:39,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 02:53:39,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:53:39,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 02:53:39,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 02:53:39,221 INFO L87 Difference]: Start difference. First operand 55 states and 74 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:53:39,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:53:39,300 INFO L93 Difference]: Finished difference Result 107 states and 145 transitions. [2023-04-01 02:53:39,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 02:53:39,301 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2023-04-01 02:53:39,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:53:39,301 INFO L225 Difference]: With dead ends: 107 [2023-04-01 02:53:39,301 INFO L226 Difference]: Without dead ends: 85 [2023-04-01 02:53:39,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 02:53:39,303 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 41 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:53:39,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 34 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:53:39,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-04-01 02:53:39,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 57. [2023-04-01 02:53:39,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 46 states have (on average 1.3695652173913044) internal successors, (63), 46 states have internal predecessors, (63), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 02:53:39,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 76 transitions. [2023-04-01 02:53:39,325 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 76 transitions. Word has length 32 [2023-04-01 02:53:39,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:53:39,325 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 76 transitions. [2023-04-01 02:53:39,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:53:39,326 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 76 transitions. [2023-04-01 02:53:39,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-01 02:53:39,326 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:53:39,326 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:53:39,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 02:53:39,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:53:39,532 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:53:39,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:53:39,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1843908698, now seen corresponding path program 1 times [2023-04-01 02:53:39,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:53:39,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729122432] [2023-04-01 02:53:39,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:53:39,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:53:39,543 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:53:39,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1303772904] [2023-04-01 02:53:39,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:53:39,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:53:39,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:53:39,544 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) [2023-04-01 02:53:39,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 02:53:39,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:53:39,615 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 02:53:39,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:53:39,670 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 02:53:39,670 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:53:39,725 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 02:53:39,726 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:53:39,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729122432] [2023-04-01 02:53:39,726 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 02:53:39,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303772904] [2023-04-01 02:53:39,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303772904] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:53:39,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1458765078] [2023-04-01 02:53:39,732 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-04-01 02:53:39,733 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:53:39,733 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:53:39,734 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:53:39,734 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:53:39,753 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:53:40,438 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-01 02:53:40,464 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 36 for LOIs [2023-04-01 02:53:40,468 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:53:40,471 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:53:41,180 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2285#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#A~0.base_BEFORE_CALL_10| Int) (|v_main_~#A~0.offset_BEFORE_CALL_10| Int) (|v_main_~#B~0.base_BEFORE_CALL_10| Int) (|v_main_~#B~0.offset_BEFORE_CALL_10| Int)) (not (= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_10|) |v_main_~#A~0.offset_BEFORE_CALL_10|) (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_10|) |v_main_~#B~0.offset_BEFORE_CALL_10|)))))' at error location [2023-04-01 02:53:41,180 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:53:41,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 02:53:41,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-04-01 02:53:41,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253526061] [2023-04-01 02:53:41,181 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 02:53:41,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 02:53:41,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:53:41,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 02:53:41,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1099, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 02:53:41,182 INFO L87 Difference]: Start difference. First operand 57 states and 76 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 02:53:41,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:53:41,558 INFO L93 Difference]: Finished difference Result 190 states and 296 transitions. [2023-04-01 02:53:41,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 02:53:41,558 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 34 [2023-04-01 02:53:41,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:53:41,559 INFO L225 Difference]: With dead ends: 190 [2023-04-01 02:53:41,559 INFO L226 Difference]: Without dead ends: 143 [2023-04-01 02:53:41,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=231, Invalid=1409, Unknown=0, NotChecked=0, Total=1640 [2023-04-01 02:53:41,561 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 266 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 02:53:41,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 43 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 02:53:41,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-04-01 02:53:41,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 81. [2023-04-01 02:53:41,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 64 states have (on average 1.265625) internal successors, (81), 64 states have internal predecessors, (81), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-01 02:53:41,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 106 transitions. [2023-04-01 02:53:41,595 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 106 transitions. Word has length 34 [2023-04-01 02:53:41,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:53:41,596 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 106 transitions. [2023-04-01 02:53:41,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 02:53:41,596 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 106 transitions. [2023-04-01 02:53:41,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-04-01 02:53:41,597 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:53:41,597 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:53:41,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 02:53:41,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:53:41,803 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:53:41,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:53:41,803 INFO L85 PathProgramCache]: Analyzing trace with hash 731659002, now seen corresponding path program 2 times [2023-04-01 02:53:41,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:53:41,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097997275] [2023-04-01 02:53:41,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:53:41,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:53:41,821 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:53:41,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [194256524] [2023-04-01 02:53:41,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:53:41,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:53:41,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:53:41,823 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) [2023-04-01 02:53:41,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 02:53:41,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 02:53:41,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:53:41,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 02:53:41,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:53:41,943 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-04-01 02:53:41,943 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:53:41,980 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-04-01 02:53:41,980 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:53:41,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097997275] [2023-04-01 02:53:41,980 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 02:53:41,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194256524] [2023-04-01 02:53:41,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194256524] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:53:41,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [452038872] [2023-04-01 02:53:41,982 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-04-01 02:53:41,982 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:53:41,983 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:53:41,983 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:53:41,983 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:53:42,004 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:53:42,603 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-01 02:53:42,620 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 36 for LOIs [2023-04-01 02:53:42,625 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:53:42,627 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:53:43,288 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3059#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#A~0.base_BEFORE_CALL_14| Int) (|v_main_~#B~0.base_BEFORE_CALL_14| Int) (|v_main_~#B~0.offset_BEFORE_CALL_14| Int) (|v_main_~#A~0.offset_BEFORE_CALL_14| Int)) (not (= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_14|) |v_main_~#A~0.offset_BEFORE_CALL_14|) (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_14|) |v_main_~#B~0.offset_BEFORE_CALL_14|)))))' at error location [2023-04-01 02:53:43,289 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:53:43,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 02:53:43,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-04-01 02:53:43,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754557959] [2023-04-01 02:53:43,289 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 02:53:43,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 02:53:43,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:53:43,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 02:53:43,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2023-04-01 02:53:43,290 INFO L87 Difference]: Start difference. First operand 81 states and 106 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 02:53:43,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:53:43,541 INFO L93 Difference]: Finished difference Result 314 states and 431 transitions. [2023-04-01 02:53:43,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 02:53:43,541 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 40 [2023-04-01 02:53:43,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:53:43,543 INFO L225 Difference]: With dead ends: 314 [2023-04-01 02:53:43,543 INFO L226 Difference]: Without dead ends: 257 [2023-04-01 02:53:43,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=121, Invalid=871, Unknown=0, NotChecked=0, Total=992 [2023-04-01 02:53:43,545 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 203 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:53:43,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 59 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:53:43,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2023-04-01 02:53:43,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 141. [2023-04-01 02:53:43,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 124 states have (on average 1.2983870967741935) internal successors, (161), 124 states have internal predecessors, (161), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-01 02:53:43,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 186 transitions. [2023-04-01 02:53:43,607 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 186 transitions. Word has length 40 [2023-04-01 02:53:43,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:53:43,607 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 186 transitions. [2023-04-01 02:53:43,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 02:53:43,608 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 186 transitions. [2023-04-01 02:53:43,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-01 02:53:43,609 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:53:43,610 INFO L195 NwaCegarLoop]: trace histogram [40, 4, 4, 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] [2023-04-01 02:53:43,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 02:53:43,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-04-01 02:53:43,817 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:53:43,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:53:43,818 INFO L85 PathProgramCache]: Analyzing trace with hash -854776814, now seen corresponding path program 3 times [2023-04-01 02:53:43,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:53:43,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470196690] [2023-04-01 02:53:43,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:53:43,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:53:43,845 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:53:43,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2037291595] [2023-04-01 02:53:43,846 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 02:53:43,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:53:43,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:53:43,847 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) [2023-04-01 02:53:43,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 02:53:43,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 02:53:43,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:53:43,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 02:53:43,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:53:43,963 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 991 trivial. 0 not checked. [2023-04-01 02:53:43,964 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 02:53:43,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:53:43,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470196690] [2023-04-01 02:53:43,964 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 02:53:43,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037291595] [2023-04-01 02:53:43,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037291595] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:53:43,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 02:53:43,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 02:53:43,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194938866] [2023-04-01 02:53:43,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:53:43,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 02:53:43,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:53:43,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 02:53:43,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 02:53:43,968 INFO L87 Difference]: Start difference. First operand 141 states and 186 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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) [2023-04-01 02:53:44,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:53:44,062 INFO L93 Difference]: Finished difference Result 191 states and 255 transitions. [2023-04-01 02:53:44,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 02:53:44,062 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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 86 [2023-04-01 02:53:44,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:53:44,063 INFO L225 Difference]: With dead ends: 191 [2023-04-01 02:53:44,063 INFO L226 Difference]: Without dead ends: 144 [2023-04-01 02:53:44,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 02:53:44,065 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 10 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:53:44,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 46 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:53:44,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-04-01 02:53:44,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 131. [2023-04-01 02:53:44,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 114 states have (on average 1.2456140350877194) internal successors, (142), 114 states have internal predecessors, (142), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-01 02:53:44,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 167 transitions. [2023-04-01 02:53:44,121 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 167 transitions. Word has length 86 [2023-04-01 02:53:44,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:53:44,121 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 167 transitions. [2023-04-01 02:53:44,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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) [2023-04-01 02:53:44,121 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 167 transitions. [2023-04-01 02:53:44,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-04-01 02:53:44,122 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:53:44,122 INFO L195 NwaCegarLoop]: trace histogram [40, 4, 4, 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] [2023-04-01 02:53:44,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 02:53:44,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:53:44,326 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:53:44,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:53:44,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1189028141, now seen corresponding path program 1 times [2023-04-01 02:53:44,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:53:44,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065222650] [2023-04-01 02:53:44,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:53:44,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:53:44,354 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:53:44,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1316025997] [2023-04-01 02:53:44,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:53:44,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:53:44,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:53:44,355 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:53:44,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 02:53:44,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:53:44,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-01 02:53:44,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:53:44,610 INFO L134 CoverageAnalysis]: Checked inductivity of 999 backedges. 374 proven. 55 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2023-04-01 02:53:44,610 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:53:44,760 INFO L134 CoverageAnalysis]: Checked inductivity of 999 backedges. 374 proven. 55 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2023-04-01 02:53:44,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:53:44,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065222650] [2023-04-01 02:53:44,761 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 02:53:44,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316025997] [2023-04-01 02:53:44,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316025997] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:53:44,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [621851936] [2023-04-01 02:53:44,763 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-04-01 02:53:44,763 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:53:44,763 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:53:44,763 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:53:44,764 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:53:44,775 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:53:45,280 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-01 02:53:45,295 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 36 for LOIs [2023-04-01 02:53:45,298 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:53:45,301 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:53:46,024 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5319#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#B~0.offset_BEFORE_CALL_18| Int) (|v_main_~#A~0.base_BEFORE_CALL_18| Int) (|v_main_~#B~0.base_BEFORE_CALL_18| Int) (|v_main_~#A~0.offset_BEFORE_CALL_18| Int)) (not (= (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_18|) |v_main_~#B~0.offset_BEFORE_CALL_18|) (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_18|) |v_main_~#A~0.offset_BEFORE_CALL_18|)))))' at error location [2023-04-01 02:53:46,024 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:53:46,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 02:53:46,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2023-04-01 02:53:46,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394620182] [2023-04-01 02:53:46,024 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 02:53:46,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-01 02:53:46,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:53:46,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-01 02:53:46,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=1966, Unknown=0, NotChecked=0, Total=2352 [2023-04-01 02:53:46,026 INFO L87 Difference]: Start difference. First operand 131 states and 167 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 02:53:46,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:53:46,947 INFO L93 Difference]: Finished difference Result 666 states and 1008 transitions. [2023-04-01 02:53:46,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-01 02:53:46,947 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 88 [2023-04-01 02:53:46,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:53:46,950 INFO L225 Difference]: With dead ends: 666 [2023-04-01 02:53:46,950 INFO L226 Difference]: Without dead ends: 546 [2023-04-01 02:53:46,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1476 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=672, Invalid=2868, Unknown=0, NotChecked=0, Total=3540 [2023-04-01 02:53:46,952 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 395 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 02:53:46,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 61 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 02:53:46,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2023-04-01 02:53:47,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 215. [2023-04-01 02:53:47,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 186 states have (on average 1.1505376344086022) internal successors, (214), 186 states have internal predecessors, (214), 25 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-04-01 02:53:47,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 263 transitions. [2023-04-01 02:53:47,038 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 263 transitions. Word has length 88 [2023-04-01 02:53:47,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:53:47,039 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 263 transitions. [2023-04-01 02:53:47,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 02:53:47,039 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 263 transitions. [2023-04-01 02:53:47,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-04-01 02:53:47,042 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:53:47,042 INFO L195 NwaCegarLoop]: trace histogram [88, 4, 4, 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] [2023-04-01 02:53:47,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 02:53:47,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 02:53:47,245 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:53:47,245 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:53:47,245 INFO L85 PathProgramCache]: Analyzing trace with hash -960743981, now seen corresponding path program 2 times [2023-04-01 02:53:47,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:53:47,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454569877] [2023-04-01 02:53:47,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:53:47,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:53:47,285 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:53:47,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [315949854] [2023-04-01 02:53:47,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:53:47,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:53:47,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:53:47,287 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:53:47,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 02:53:47,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 02:53:47,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:53:47,421 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 02:53:47,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:53:47,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4239 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4238 trivial. 0 not checked. [2023-04-01 02:53:47,688 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:53:47,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4239 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4238 trivial. 0 not checked. [2023-04-01 02:53:47,840 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:53:47,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454569877] [2023-04-01 02:53:47,840 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 02:53:47,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315949854] [2023-04-01 02:53:47,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315949854] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:53:47,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1369249852] [2023-04-01 02:53:47,842 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-04-01 02:53:47,842 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:53:47,842 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:53:47,843 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:53:47,843 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:53:47,860 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:53:48,391 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-01 02:53:48,405 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 36 for LOIs [2023-04-01 02:53:48,409 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:53:48,411 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:53:49,127 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7872#(and (exists ((|v_main_~#A~0.base_BEFORE_CALL_22| Int) (|v_main_~#B~0.base_BEFORE_CALL_22| Int) (|v_main_~#A~0.offset_BEFORE_CALL_22| Int) (|v_main_~#B~0.offset_BEFORE_CALL_22| Int)) (not (= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_22|) |v_main_~#A~0.offset_BEFORE_CALL_22|) (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_22|) |v_main_~#B~0.offset_BEFORE_CALL_22|)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 02:53:49,127 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:53:49,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 02:53:49,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-04-01 02:53:49,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831272045] [2023-04-01 02:53:49,127 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 02:53:49,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 02:53:49,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:53:49,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 02:53:49,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2023-04-01 02:53:49,129 INFO L87 Difference]: Start difference. First operand 215 states and 263 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 02:53:49,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:53:49,454 INFO L93 Difference]: Finished difference Result 520 states and 674 transitions. [2023-04-01 02:53:49,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 02:53:49,455 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 136 [2023-04-01 02:53:49,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:53:49,458 INFO L225 Difference]: With dead ends: 520 [2023-04-01 02:53:49,458 INFO L226 Difference]: Without dead ends: 444 [2023-04-01 02:53:49,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=136, Invalid=1054, Unknown=0, NotChecked=0, Total=1190 [2023-04-01 02:53:49,460 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 161 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:53:49,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 54 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:53:49,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2023-04-01 02:53:49,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 213. [2023-04-01 02:53:49,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 184 states have (on average 1.1304347826086956) internal successors, (208), 184 states have internal predecessors, (208), 25 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-04-01 02:53:49,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 257 transitions. [2023-04-01 02:53:49,572 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 257 transitions. Word has length 136 [2023-04-01 02:53:49,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:53:49,573 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 257 transitions. [2023-04-01 02:53:49,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 02:53:49,573 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 257 transitions. [2023-04-01 02:53:49,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-04-01 02:53:49,574 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:53:49,574 INFO L195 NwaCegarLoop]: trace histogram [88, 4, 4, 4, 4, 4, 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] [2023-04-01 02:53:49,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-01 02:53:49,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-01 02:53:49,775 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:53:49,775 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:53:49,775 INFO L85 PathProgramCache]: Analyzing trace with hash -710531051, now seen corresponding path program 3 times [2023-04-01 02:53:49,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:53:49,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967521368] [2023-04-01 02:53:49,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:53:49,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:53:49,821 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:53:49,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2136976757] [2023-04-01 02:53:49,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 02:53:49,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:53:49,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:53:49,823 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:53:49,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-01 02:53:50,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 02:53:50,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:53:50,020 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 02:53:50,024 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:53:50,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4271 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 4241 trivial. 0 not checked. [2023-04-01 02:53:50,038 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 02:53:50,038 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:53:50,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967521368] [2023-04-01 02:53:50,038 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 02:53:50,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136976757] [2023-04-01 02:53:50,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136976757] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:53:50,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 02:53:50,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 02:53:50,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461547448] [2023-04-01 02:53:50,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:53:50,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 02:53:50,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:53:50,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 02:53:50,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 02:53:50,040 INFO L87 Difference]: Start difference. First operand 213 states and 257 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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) [2023-04-01 02:53:50,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:53:50,203 INFO L93 Difference]: Finished difference Result 308 states and 388 transitions. [2023-04-01 02:53:50,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 02:53:50,204 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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 144 [2023-04-01 02:53:50,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:53:50,205 INFO L225 Difference]: With dead ends: 308 [2023-04-01 02:53:50,205 INFO L226 Difference]: Without dead ends: 217 [2023-04-01 02:53:50,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 02:53:50,206 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 5 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:53:50,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 44 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:53:50,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2023-04-01 02:53:50,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2023-04-01 02:53:50,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 188 states have (on average 1.127659574468085) internal successors, (212), 188 states have internal predecessors, (212), 25 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-04-01 02:53:50,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 261 transitions. [2023-04-01 02:53:50,313 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 261 transitions. Word has length 144 [2023-04-01 02:53:50,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:53:50,313 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 261 transitions. [2023-04-01 02:53:50,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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) [2023-04-01 02:53:50,313 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 261 transitions. [2023-04-01 02:53:50,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-04-01 02:53:50,314 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:53:50,314 INFO L195 NwaCegarLoop]: trace histogram [88, 4, 4, 4, 4, 4, 4, 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] [2023-04-01 02:53:50,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-04-01 02:53:50,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-01 02:53:50,521 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:53:50,521 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:53:50,521 INFO L85 PathProgramCache]: Analyzing trace with hash -974315267, now seen corresponding path program 1 times [2023-04-01 02:53:50,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:53:50,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628181865] [2023-04-01 02:53:50,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:53:50,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:53:50,562 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:53:50,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1453035761] [2023-04-01 02:53:50,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:53:50,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:53:50,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:53:50,564 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:53:50,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-01 02:53:50,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:53:50,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 1068 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-01 02:53:50,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:53:51,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4293 backedges. 1598 proven. 253 refuted. 0 times theorem prover too weak. 2442 trivial. 0 not checked. [2023-04-01 02:53:51,221 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:53:51,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4293 backedges. 1598 proven. 253 refuted. 0 times theorem prover too weak. 2442 trivial. 0 not checked. [2023-04-01 02:53:51,723 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:53:51,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628181865] [2023-04-01 02:53:51,723 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 02:53:51,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453035761] [2023-04-01 02:53:51,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453035761] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:53:51,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1365540858] [2023-04-01 02:53:51,725 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-04-01 02:53:51,725 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:53:51,725 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:53:51,725 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:53:51,725 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:53:51,739 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:53:52,298 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 41 for LOIs [2023-04-01 02:53:52,311 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 36 for LOIs [2023-04-01 02:53:52,315 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:53:52,318 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:53:53,028 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11549#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#B~0.base_BEFORE_CALL_26| Int) (|v_main_~#A~0.base_BEFORE_CALL_26| Int) (|v_main_~#A~0.offset_BEFORE_CALL_26| Int) (|v_main_~#B~0.offset_BEFORE_CALL_26| Int)) (not (= (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_26|) |v_main_~#B~0.offset_BEFORE_CALL_26|) (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_26|) |v_main_~#A~0.offset_BEFORE_CALL_26|)))))' at error location [2023-04-01 02:53:53,028 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:53:53,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 02:53:53,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2023-04-01 02:53:53,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875434043] [2023-04-01 02:53:53,029 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 02:53:53,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-04-01 02:53:53,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:53:53,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-04-01 02:53:53,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1255, Invalid=4001, Unknown=0, NotChecked=0, Total=5256 [2023-04-01 02:53:53,031 INFO L87 Difference]: Start difference. First operand 217 states and 261 transitions. Second operand has 50 states, 50 states have (on average 1.6) internal successors, (80), 50 states have internal predecessors, (80), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 02:53:55,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:53:55,491 INFO L93 Difference]: Finished difference Result 822 states and 1192 transitions. [2023-04-01 02:53:55,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-04-01 02:53:55,492 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.6) internal successors, (80), 50 states have internal predecessors, (80), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 148 [2023-04-01 02:53:55,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:53:55,494 INFO L225 Difference]: With dead ends: 822 [2023-04-01 02:53:55,494 INFO L226 Difference]: Without dead ends: 616 [2023-04-01 02:53:55,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 372 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3487 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2405, Invalid=6715, Unknown=0, NotChecked=0, Total=9120 [2023-04-01 02:53:55,497 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 791 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 906 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 814 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 906 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 02:53:55,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [814 Valid, 97 Invalid, 1457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [906 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 02:53:55,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2023-04-01 02:53:55,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 385. [2023-04-01 02:53:55,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 332 states have (on average 1.072289156626506) internal successors, (356), 332 states have internal predecessors, (356), 49 states have call successors, (49), 4 states have call predecessors, (49), 3 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2023-04-01 02:53:55,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 453 transitions. [2023-04-01 02:53:55,646 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 453 transitions. Word has length 148 [2023-04-01 02:53:55,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:53:55,646 INFO L495 AbstractCegarLoop]: Abstraction has 385 states and 453 transitions. [2023-04-01 02:53:55,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.6) internal successors, (80), 50 states have internal predecessors, (80), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 02:53:55,647 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 453 transitions. [2023-04-01 02:53:55,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2023-04-01 02:53:55,649 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:53:55,649 INFO L195 NwaCegarLoop]: trace histogram [184, 4, 4, 4, 4, 4, 4, 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] [2023-04-01 02:53:55,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-04-01 02:53:55,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-01 02:53:55,857 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:53:55,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:53:55,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1386204925, now seen corresponding path program 2 times [2023-04-01 02:53:55,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:53:55,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518245119] [2023-04-01 02:53:55,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:53:55,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:53:55,938 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:53:55,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1200930002] [2023-04-01 02:53:55,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:53:55,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:53:55,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:53:55,940 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:53:55,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-04-01 02:53:56,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 02:53:56,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:53:56,240 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 02:53:56,244 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:53:56,473 INFO L134 CoverageAnalysis]: Checked inductivity of 17685 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17684 trivial. 0 not checked. [2023-04-01 02:53:56,473 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:53:56,772 INFO L134 CoverageAnalysis]: Checked inductivity of 17685 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17684 trivial. 0 not checked. [2023-04-01 02:53:56,772 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:53:56,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518245119] [2023-04-01 02:53:56,773 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 02:53:56,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200930002] [2023-04-01 02:53:56,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200930002] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:53:56,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [53722953] [2023-04-01 02:53:56,774 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-04-01 02:53:56,774 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:53:56,775 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:53:56,775 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:53:56,775 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:53:56,786 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:53:57,379 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 41 for LOIs [2023-04-01 02:53:57,392 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 36 for LOIs [2023-04-01 02:53:57,396 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:53:57,415 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:53:58,097 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15366#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#A~0.offset_BEFORE_CALL_30| Int) (|v_main_~#B~0.base_BEFORE_CALL_30| Int) (|v_main_~#B~0.offset_BEFORE_CALL_30| Int) (|v_main_~#A~0.base_BEFORE_CALL_30| Int)) (not (= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_30|) |v_main_~#A~0.offset_BEFORE_CALL_30|) (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_30|) |v_main_~#B~0.offset_BEFORE_CALL_30|)))))' at error location [2023-04-01 02:53:58,097 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:53:58,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 02:53:58,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-04-01 02:53:58,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834836837] [2023-04-01 02:53:58,098 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 02:53:58,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 02:53:58,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:53:58,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 02:53:58,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2023-04-01 02:53:58,099 INFO L87 Difference]: Start difference. First operand 385 states and 453 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 02:53:58,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:53:58,695 INFO L93 Difference]: Finished difference Result 1180 states and 1507 transitions. [2023-04-01 02:53:58,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 02:53:58,695 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 244 [2023-04-01 02:53:58,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:53:58,699 INFO L225 Difference]: With dead ends: 1180 [2023-04-01 02:53:58,699 INFO L226 Difference]: Without dead ends: 1011 [2023-04-01 02:53:58,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 733 GetRequests, 702 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 02:53:58,701 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 100 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:53:58,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 66 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:53:58,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2023-04-01 02:53:58,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 394. [2023-04-01 02:53:58,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 341 states have (on average 1.0879765395894427) internal successors, (371), 341 states have internal predecessors, (371), 49 states have call successors, (49), 4 states have call predecessors, (49), 3 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2023-04-01 02:53:58,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 468 transitions. [2023-04-01 02:53:58,930 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 468 transitions. Word has length 244 [2023-04-01 02:53:58,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:53:58,930 INFO L495 AbstractCegarLoop]: Abstraction has 394 states and 468 transitions. [2023-04-01 02:53:58,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 02:53:58,930 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 468 transitions. [2023-04-01 02:53:58,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2023-04-01 02:53:58,932 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:53:58,932 INFO L195 NwaCegarLoop]: trace histogram [184, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2023-04-01 02:53:58,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-04-01 02:53:59,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:53:59,140 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:53:59,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:53:59,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1668526221, now seen corresponding path program 3 times [2023-04-01 02:53:59,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:53:59,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856966268] [2023-04-01 02:53:59,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:53:59,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:53:59,208 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:53:59,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1509712212] [2023-04-01 02:53:59,208 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 02:53:59,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:53:59,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:53:59,209 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:53:59,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-04-01 02:53:59,531 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 02:53:59,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:53:59,533 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 02:53:59,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:53:59,761 INFO L134 CoverageAnalysis]: Checked inductivity of 17703 backedges. 8859 proven. 4429 refuted. 0 times theorem prover too weak. 4415 trivial. 0 not checked. [2023-04-01 02:53:59,761 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:53:59,945 INFO L134 CoverageAnalysis]: Checked inductivity of 17703 backedges. 6646 proven. 6642 refuted. 0 times theorem prover too weak. 4415 trivial. 0 not checked. [2023-04-01 02:53:59,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:53:59,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856966268] [2023-04-01 02:53:59,946 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 02:53:59,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509712212] [2023-04-01 02:53:59,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509712212] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:53:59,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [650733008] [2023-04-01 02:53:59,947 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-04-01 02:53:59,948 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:53:59,948 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:53:59,948 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:53:59,948 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:53:59,962 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:54:00,600 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 41 for LOIs [2023-04-01 02:54:00,614 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 36 for LOIs [2023-04-01 02:54:00,618 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:54:00,620 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:54:01,313 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19704#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#A~0.base_BEFORE_CALL_34| Int) (|v_main_~#B~0.base_BEFORE_CALL_34| Int) (|v_main_~#A~0.offset_BEFORE_CALL_34| Int) (|v_main_~#B~0.offset_BEFORE_CALL_34| Int)) (not (= (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_34|) |v_main_~#B~0.offset_BEFORE_CALL_34|) (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_34|) |v_main_~#A~0.offset_BEFORE_CALL_34|)))))' at error location [2023-04-01 02:54:01,313 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:54:01,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 02:54:01,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-04-01 02:54:01,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733295375] [2023-04-01 02:54:01,314 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 02:54:01,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 02:54:01,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:54:01,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 02:54:01,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2023-04-01 02:54:01,315 INFO L87 Difference]: Start difference. First operand 394 states and 468 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 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) [2023-04-01 02:54:02,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:54:02,273 INFO L93 Difference]: Finished difference Result 1833 states and 2246 transitions. [2023-04-01 02:54:02,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 02:54:02,274 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 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 250 [2023-04-01 02:54:02,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:54:02,279 INFO L225 Difference]: With dead ends: 1833 [2023-04-01 02:54:02,280 INFO L226 Difference]: Without dead ends: 1498 [2023-04-01 02:54:02,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 758 GetRequests, 716 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=186, Invalid=1454, Unknown=0, NotChecked=0, Total=1640 [2023-04-01 02:54:02,282 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 137 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:54:02,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 56 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:54:02,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2023-04-01 02:54:02,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 726. [2023-04-01 02:54:02,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 627 states have (on average 1.0558213716108453) internal successors, (662), 627 states have internal predecessors, (662), 95 states have call successors, (95), 4 states have call predecessors, (95), 3 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2023-04-01 02:54:02,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 851 transitions. [2023-04-01 02:54:02,569 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 851 transitions. Word has length 250 [2023-04-01 02:54:02,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:54:02,569 INFO L495 AbstractCegarLoop]: Abstraction has 726 states and 851 transitions. [2023-04-01 02:54:02,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 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) [2023-04-01 02:54:02,569 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 851 transitions. [2023-04-01 02:54:02,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2023-04-01 02:54:02,575 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:54:02,575 INFO L195 NwaCegarLoop]: trace histogram [368, 8, 8, 4, 4, 4, 4, 4, 4, 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] [2023-04-01 02:54:02,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-04-01 02:54:02,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-04-01 02:54:02,782 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:54:02,782 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:54:02,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1603475475, now seen corresponding path program 4 times [2023-04-01 02:54:02,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:54:02,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639592233] [2023-04-01 02:54:02,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:54:02,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:54:02,934 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:54:02,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1449078215] [2023-04-01 02:54:02,935 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 02:54:02,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:54:02,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:54:02,940 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:54:02,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-04-01 02:54:03,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:54:03,781 INFO L262 TraceCheckSpWp]: Trace formula consists of 3636 conjuncts, 49 conjunts are in the unsatisfiable core [2023-04-01 02:54:03,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:54:04,856 INFO L134 CoverageAnalysis]: Checked inductivity of 70663 backedges. 15478 proven. 1081 refuted. 0 times theorem prover too weak. 54104 trivial. 0 not checked. [2023-04-01 02:54:04,856 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:54:06,598 INFO L134 CoverageAnalysis]: Checked inductivity of 70663 backedges. 15478 proven. 1081 refuted. 0 times theorem prover too weak. 54104 trivial. 0 not checked. [2023-04-01 02:54:06,598 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:54:06,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639592233] [2023-04-01 02:54:06,598 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 02:54:06,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449078215] [2023-04-01 02:54:06,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449078215] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:54:06,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [344380396] [2023-04-01 02:54:06,600 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-04-01 02:54:06,600 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:54:06,601 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:54:06,601 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:54:06,601 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:54:06,620 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:54:07,237 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 41 for LOIs [2023-04-01 02:54:07,249 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 36 for LOIs [2023-04-01 02:54:07,254 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:54:07,256 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:54:07,993 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27175#(and (exists ((|v_main_~#A~0.base_BEFORE_CALL_38| Int) (|v_main_~#B~0.base_BEFORE_CALL_38| Int) (|v_main_~#A~0.offset_BEFORE_CALL_38| Int) (|v_main_~#B~0.offset_BEFORE_CALL_38| Int)) (not (= (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_38|) |v_main_~#B~0.offset_BEFORE_CALL_38|) (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_38|) |v_main_~#A~0.offset_BEFORE_CALL_38|)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 02:54:07,993 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:54:07,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 02:54:07,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2023-04-01 02:54:07,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844175280] [2023-04-01 02:54:07,993 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 02:54:07,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2023-04-01 02:54:07,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:54:07,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2023-04-01 02:54:07,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4735, Invalid=9785, Unknown=0, NotChecked=0, Total=14520 [2023-04-01 02:54:07,999 INFO L87 Difference]: Start difference. First operand 726 states and 851 transitions. Second operand has 98 states, 98 states have (on average 1.3061224489795917) internal successors, (128), 98 states have internal predecessors, (128), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 02:54:19,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:54:19,407 INFO L93 Difference]: Finished difference Result 3383 states and 5054 transitions. [2023-04-01 02:54:19,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-04-01 02:54:19,408 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.3061224489795917) internal successors, (128), 98 states have internal predecessors, (128), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 442 [2023-04-01 02:54:19,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:54:19,416 INFO L225 Difference]: With dead ends: 3383 [2023-04-01 02:54:19,417 INFO L226 Difference]: Without dead ends: 2715 [2023-04-01 02:54:19,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1372 GetRequests, 1206 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9271 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=9341, Invalid=18715, Unknown=0, NotChecked=0, Total=28056 [2023-04-01 02:54:19,426 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 2747 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 941 mSolverCounterSat, 1886 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2794 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 2827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1886 IncrementalHoareTripleChecker+Valid, 941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-01 02:54:19,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2794 Valid, 70 Invalid, 2827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1886 Valid, 941 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-01 02:54:19,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2715 states. [2023-04-01 02:54:20,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2715 to 1398. [2023-04-01 02:54:20,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1203 states have (on average 1.029093931837074) internal successors, (1238), 1203 states have internal predecessors, (1238), 191 states have call successors, (191), 4 states have call predecessors, (191), 3 states have return successors, (190), 190 states have call predecessors, (190), 190 states have call successors, (190) [2023-04-01 02:54:20,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 1619 transitions. [2023-04-01 02:54:20,118 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 1619 transitions. Word has length 442 [2023-04-01 02:54:20,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:54:20,118 INFO L495 AbstractCegarLoop]: Abstraction has 1398 states and 1619 transitions. [2023-04-01 02:54:20,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.3061224489795917) internal successors, (128), 98 states have internal predecessors, (128), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 02:54:20,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 1619 transitions. [2023-04-01 02:54:20,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 827 [2023-04-01 02:54:20,137 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:54:20,138 INFO L195 NwaCegarLoop]: trace histogram [752, 8, 8, 4, 4, 4, 4, 4, 4, 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] [2023-04-01 02:54:20,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-04-01 02:54:20,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-04-01 02:54:20,351 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:54:20,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:54:20,351 INFO L85 PathProgramCache]: Analyzing trace with hash 858562541, now seen corresponding path program 5 times [2023-04-01 02:54:20,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:54:20,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841888932] [2023-04-01 02:54:20,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:54:20,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:54:20,576 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:54:20,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1808846034] [2023-04-01 02:54:20,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:54:20,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:54:20,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:54:20,578 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:54:20,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-04-01 02:54:21,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 02:54:21,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:54:21,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 02:54:21,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:54:22,158 INFO L134 CoverageAnalysis]: Checked inductivity of 288583 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 288575 trivial. 0 not checked. [2023-04-01 02:54:22,158 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 02:54:22,158 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:54:22,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841888932] [2023-04-01 02:54:22,158 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 02:54:22,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808846034] [2023-04-01 02:54:22,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808846034] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:54:22,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 02:54:22,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 02:54:22,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954597076] [2023-04-01 02:54:22,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:54:22,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 02:54:22,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:54:22,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 02:54:22,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 02:54:22,160 INFO L87 Difference]: Start difference. First operand 1398 states and 1619 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:54:22,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:54:22,764 INFO L93 Difference]: Finished difference Result 2010 states and 2442 transitions. [2023-04-01 02:54:22,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 02:54:22,764 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 826 [2023-04-01 02:54:22,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:54:22,770 INFO L225 Difference]: With dead ends: 2010 [2023-04-01 02:54:22,770 INFO L226 Difference]: Without dead ends: 1406 [2023-04-01 02:54:22,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 825 GetRequests, 823 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 02:54:22,773 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 25 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:54:22,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 28 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:54:22,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1406 states. [2023-04-01 02:54:23,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1406 to 1401. [2023-04-01 02:54:23,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1401 states, 1206 states have (on average 1.029021558872305) internal successors, (1241), 1206 states have internal predecessors, (1241), 191 states have call successors, (191), 4 states have call predecessors, (191), 3 states have return successors, (190), 190 states have call predecessors, (190), 190 states have call successors, (190) [2023-04-01 02:54:23,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1401 states to 1401 states and 1622 transitions. [2023-04-01 02:54:23,418 INFO L78 Accepts]: Start accepts. Automaton has 1401 states and 1622 transitions. Word has length 826 [2023-04-01 02:54:23,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:54:23,419 INFO L495 AbstractCegarLoop]: Abstraction has 1401 states and 1622 transitions. [2023-04-01 02:54:23,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:54:23,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1401 states and 1622 transitions. [2023-04-01 02:54:23,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 833 [2023-04-01 02:54:23,425 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:54:23,425 INFO L195 NwaCegarLoop]: trace histogram [752, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:54:23,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-04-01 02:54:23,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-04-01 02:54:23,633 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:54:23,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:54:23,634 INFO L85 PathProgramCache]: Analyzing trace with hash 64696814, now seen corresponding path program 6 times [2023-04-01 02:54:23,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:54:23,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461355945] [2023-04-01 02:54:23,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:54:23,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:54:23,872 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:54:23,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2132955217] [2023-04-01 02:54:23,873 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 02:54:23,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:54:23,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:54:23,877 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:54:23,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-04-01 02:54:24,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 02:54:24,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:54:24,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 02:54:24,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:54:24,948 INFO L134 CoverageAnalysis]: Checked inductivity of 288610 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 288583 trivial. 0 not checked. [2023-04-01 02:54:24,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:54:24,988 INFO L134 CoverageAnalysis]: Checked inductivity of 288610 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 288583 trivial. 0 not checked. [2023-04-01 02:54:24,988 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:54:24,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461355945] [2023-04-01 02:54:24,988 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 02:54:24,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132955217] [2023-04-01 02:54:24,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132955217] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:54:24,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [823588231] [2023-04-01 02:54:24,990 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-04-01 02:54:24,990 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:54:24,991 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:54:24,991 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:54:24,991 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:54:25,004 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:54:25,558 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 41 for LOIs [2023-04-01 02:54:25,570 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 36 for LOIs [2023-04-01 02:54:25,574 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:54:25,577 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:54:26,310 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '50081#(and (exists ((|v_main_~#A~0.base_BEFORE_CALL_42| Int) (|v_main_~#B~0.base_BEFORE_CALL_42| Int) (|v_main_~#A~0.offset_BEFORE_CALL_42| Int) (|v_main_~#B~0.offset_BEFORE_CALL_42| Int)) (not (= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_42|) |v_main_~#A~0.offset_BEFORE_CALL_42|) (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_42|) |v_main_~#B~0.offset_BEFORE_CALL_42|)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 02:54:26,311 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:54:26,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 02:54:26,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-04-01 02:54:26,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710607670] [2023-04-01 02:54:26,311 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 02:54:26,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 02:54:26,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:54:26,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 02:54:26,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1004, Unknown=0, NotChecked=0, Total=1122 [2023-04-01 02:54:26,313 INFO L87 Difference]: Start difference. First operand 1401 states and 1622 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 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) [2023-04-01 02:54:27,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:54:27,201 INFO L93 Difference]: Finished difference Result 2070 states and 2544 transitions. [2023-04-01 02:54:27,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 02:54:27,201 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 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 832 [2023-04-01 02:54:27,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:54:27,207 INFO L225 Difference]: With dead ends: 2070 [2023-04-01 02:54:27,207 INFO L226 Difference]: Without dead ends: 1434 [2023-04-01 02:54:27,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2503 GetRequests, 2462 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=206, Invalid=1516, Unknown=0, NotChecked=0, Total=1722 [2023-04-01 02:54:27,210 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 36 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:54:27,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 97 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:54:27,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1434 states. [2023-04-01 02:54:27,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1434 to 1411. [2023-04-01 02:54:27,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1411 states, 1216 states have (on average 1.0320723684210527) internal successors, (1255), 1216 states have internal predecessors, (1255), 191 states have call successors, (191), 4 states have call predecessors, (191), 3 states have return successors, (190), 190 states have call predecessors, (190), 190 states have call successors, (190) [2023-04-01 02:54:27,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1411 states to 1411 states and 1636 transitions. [2023-04-01 02:54:27,802 INFO L78 Accepts]: Start accepts. Automaton has 1411 states and 1636 transitions. Word has length 832 [2023-04-01 02:54:27,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:54:27,803 INFO L495 AbstractCegarLoop]: Abstraction has 1411 states and 1636 transitions. [2023-04-01 02:54:27,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 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) [2023-04-01 02:54:27,803 INFO L276 IsEmpty]: Start isEmpty. Operand 1411 states and 1636 transitions. [2023-04-01 02:54:27,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 838 [2023-04-01 02:54:27,809 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:54:27,809 INFO L195 NwaCegarLoop]: trace histogram [752, 8, 8, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:54:27,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-04-01 02:54:28,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-04-01 02:54:28,021 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:54:28,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:54:28,021 INFO L85 PathProgramCache]: Analyzing trace with hash 623481234, now seen corresponding path program 7 times [2023-04-01 02:54:28,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:54:28,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107961336] [2023-04-01 02:54:28,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:54:28,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:54:28,248 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:54:28,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [31092775] [2023-04-01 02:54:28,248 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 02:54:28,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:54:28,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:54:28,249 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:54:28,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process