/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-examples/standard_partition_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 02:41:01,912 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 02:41:01,913 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 02:41:01,943 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 02:41:01,943 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 02:41:01,944 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 02:41:01,945 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 02:41:01,946 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 02:41:01,947 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 02:41:01,948 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 02:41:01,948 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 02:41:01,949 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 02:41:01,949 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 02:41:01,952 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 02:41:01,952 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 02:41:01,953 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 02:41:01,954 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 02:41:01,955 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 02:41:01,956 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 02:41:01,958 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 02:41:01,959 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 02:41:01,964 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 02:41:01,965 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 02:41:01,965 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 02:41:01,968 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 02:41:01,970 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 02:41:01,971 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 02:41:01,971 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 02:41:01,972 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 02:41:01,972 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 02:41:01,973 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 02:41:01,973 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 02:41:01,973 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 02:41:01,974 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 02:41:01,974 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 02:41:01,975 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 02:41:01,983 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 02:41:01,997 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 02:41:01,997 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 02:41:01,997 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 02:41:01,997 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 02:41:01,998 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 02:41:01,998 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 02:41:01,998 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 02:41:01,998 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 02:41:01,998 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 02:41:01,999 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 02:41:01,999 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 02:41:01,999 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 02:41:01,999 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 02:41:01,999 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 02:41:01,999 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 02:41:01,999 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 02:41:01,999 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 02:41:01,999 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 02:41:02,000 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 02:41:02,000 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 02:41:02,000 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 02:41:02,000 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 02:41:02,000 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 02:41:02,001 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 02:41:02,001 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 02:41:02,001 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 02:41:02,001 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 02:41:02,001 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 02:41:02,001 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 02:41:02,001 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 02:41:02,001 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 02:41:02,001 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 02:41:02,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 02:41:02,002 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 02:41:02,002 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 02:41:02,002 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 02:41:02,002 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 02:41:02,002 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 02:41:02,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 02:41:02,002 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 02:41:02,002 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 02:41:02,002 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 02:41:02,182 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 02:41:02,216 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 02:41:02,217 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 02:41:02,218 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 02:41:02,218 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 02:41:02,219 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_partition_ground-2.i [2023-04-01 02:41:03,314 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 02:41:03,473 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 02:41:03,473 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_partition_ground-2.i [2023-04-01 02:41:03,478 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6197274f/242ea7e40a2242459615a6b38888e734/FLAG1e846a897 [2023-04-01 02:41:03,492 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6197274f/242ea7e40a2242459615a6b38888e734 [2023-04-01 02:41:03,494 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 02:41:03,495 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 02:41:03,499 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 02:41:03,499 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 02:41:03,501 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 02:41:03,502 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 02:41:03" (1/1) ... [2023-04-01 02:41:03,503 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3447e14a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:41:03, skipping insertion in model container [2023-04-01 02:41:03,503 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 02:41:03" (1/1) ... [2023-04-01 02:41:03,508 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 02:41:03,522 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 02:41:03,640 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-examples/standard_partition_ground-2.i[820,833] [2023-04-01 02:41:03,651 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 02:41:03,658 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 02:41:03,665 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-examples/standard_partition_ground-2.i[820,833] [2023-04-01 02:41:03,671 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 02:41:03,680 INFO L208 MainTranslator]: Completed translation [2023-04-01 02:41:03,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:41:03 WrapperNode [2023-04-01 02:41:03,680 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 02:41:03,681 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 02:41:03,681 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 02:41:03,681 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 02:41:03,689 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:41:03" (1/1) ... [2023-04-01 02:41:03,689 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:41:03" (1/1) ... [2023-04-01 02:41:03,694 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:41:03" (1/1) ... [2023-04-01 02:41:03,694 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:41:03" (1/1) ... [2023-04-01 02:41:03,698 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:41:03" (1/1) ... [2023-04-01 02:41:03,701 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:41:03" (1/1) ... [2023-04-01 02:41:03,701 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:41:03" (1/1) ... [2023-04-01 02:41:03,702 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:41:03" (1/1) ... [2023-04-01 02:41:03,704 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 02:41:03,705 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 02:41:03,705 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 02:41:03,705 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 02:41:03,706 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:41:03" (1/1) ... [2023-04-01 02:41:03,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 02:41:03,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:41:03,736 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 02:41:03,737 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 02:41:03,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 02:41:03,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 02:41:03,763 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 02:41:03,763 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 02:41:03,763 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 02:41:03,763 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 02:41:03,763 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 02:41:03,763 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 02:41:03,764 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 02:41:03,764 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 02:41:03,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 02:41:03,764 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 02:41:03,764 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 02:41:03,764 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 02:41:03,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 02:41:03,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 02:41:03,764 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 02:41:03,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 02:41:03,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 02:41:03,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 02:41:03,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 02:41:03,844 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 02:41:03,862 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 02:41:04,075 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 02:41:04,126 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 02:41:04,127 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-04-01 02:41:04,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 02:41:04 BoogieIcfgContainer [2023-04-01 02:41:04,129 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 02:41:04,130 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 02:41:04,130 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 02:41:04,133 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 02:41:04,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 02:41:03" (1/3) ... [2023-04-01 02:41:04,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4412fe5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 02:41:04, skipping insertion in model container [2023-04-01 02:41:04,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:41:03" (2/3) ... [2023-04-01 02:41:04,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4412fe5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 02:41:04, skipping insertion in model container [2023-04-01 02:41:04,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 02:41:04" (3/3) ... [2023-04-01 02:41:04,135 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_partition_ground-2.i [2023-04-01 02:41:04,147 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 02:41:04,147 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 02:41:04,189 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 02:41:04,194 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;@5213f832, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 02:41:04,194 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 02:41:04,198 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 02:41:04,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-01 02:41:04,203 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:41:04,203 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:41:04,203 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:41:04,207 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:41:04,207 INFO L85 PathProgramCache]: Analyzing trace with hash 149831594, now seen corresponding path program 1 times [2023-04-01 02:41:04,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:41:04,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723857034] [2023-04-01 02:41:04,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:41:04,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:41:04,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:41:04,391 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 02:41:04,391 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:41:04,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723857034] [2023-04-01 02:41:04,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723857034] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:41:04,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 02:41:04,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 02:41:04,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606294050] [2023-04-01 02:41:04,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:41:04,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 02:41:04,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:41:04,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 02:41:04,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 02:41:04,419 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:41:04,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:41:04,465 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2023-04-01 02:41:04,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 02:41:04,469 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-04-01 02:41:04,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:41:04,474 INFO L225 Difference]: With dead ends: 35 [2023-04-01 02:41:04,474 INFO L226 Difference]: Without dead ends: 18 [2023-04-01 02:41:04,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 02:41:04,484 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:41:04,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:41:04,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-04-01 02:41:04,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-04-01 02:41:04,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:41:04,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2023-04-01 02:41:04,507 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 13 [2023-04-01 02:41:04,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:41:04,507 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2023-04-01 02:41:04,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:41:04,508 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2023-04-01 02:41:04,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-01 02:41:04,508 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:41:04,508 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:41:04,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 02:41:04,509 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:41:04,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:41:04,509 INFO L85 PathProgramCache]: Analyzing trace with hash 966017234, now seen corresponding path program 1 times [2023-04-01 02:41:04,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:41:04,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173406371] [2023-04-01 02:41:04,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:41:04,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:41:04,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:41:04,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 02:41:04,575 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:41:04,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173406371] [2023-04-01 02:41:04,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173406371] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:41:04,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 02:41:04,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 02:41:04,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168140413] [2023-04-01 02:41:04,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:41:04,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 02:41:04,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:41:04,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 02:41:04,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 02:41:04,577 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:41:04,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:41:04,592 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2023-04-01 02:41:04,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 02:41:04,593 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-04-01 02:41:04,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:41:04,593 INFO L225 Difference]: With dead ends: 30 [2023-04-01 02:41:04,594 INFO L226 Difference]: Without dead ends: 20 [2023-04-01 02:41:04,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 02:41:04,595 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:41:04,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:41:04,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-04-01 02:41:04,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-04-01 02:41:04,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:41:04,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2023-04-01 02:41:04,599 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2023-04-01 02:41:04,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:41:04,600 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2023-04-01 02:41:04,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:41:04,600 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2023-04-01 02:41:04,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-01 02:41:04,600 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:41:04,600 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:41:04,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 02:41:04,601 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:41:04,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:41:04,601 INFO L85 PathProgramCache]: Analyzing trace with hash -349934862, now seen corresponding path program 1 times [2023-04-01 02:41:04,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:41:04,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250105706] [2023-04-01 02:41:04,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:41:04,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:41:04,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:41:04,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 02:41:04,668 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:41:04,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250105706] [2023-04-01 02:41:04,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250105706] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:41:04,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019414613] [2023-04-01 02:41:04,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:41:04,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:04,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:41:04,671 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 02:41:04,682 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 02:41:04,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:41:04,762 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 02:41:04,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:41:04,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 02:41:04,799 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:41:04,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 02:41:04,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019414613] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:41:04,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2074888651] [2023-04-01 02:41:04,850 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-04-01 02:41:04,850 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:41:04,852 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:41:04,856 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:41:04,856 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:41:04,948 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:41:05,336 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2023-04-01 02:41:05,351 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:41:05,358 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:41:05,583 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '289#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#bb~0.base_BEFORE_CALL_1| Int) (|v_main_~#bb~0.offset_BEFORE_CALL_1| Int)) (< (select (select |#memory_int| |v_main_~#bb~0.base_BEFORE_CALL_1|) |v_main_~#bb~0.offset_BEFORE_CALL_1|) 0)))' at error location [2023-04-01 02:41:05,584 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:41:05,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:41:05,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-01 02:41:05,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596652356] [2023-04-01 02:41:05,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:41:05,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 02:41:05,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:41:05,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 02:41:05,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2023-04-01 02:41:05,588 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:41:05,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:41:05,627 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2023-04-01 02:41:05,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 02:41:05,627 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-04-01 02:41:05,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:41:05,628 INFO L225 Difference]: With dead ends: 36 [2023-04-01 02:41:05,629 INFO L226 Difference]: Without dead ends: 23 [2023-04-01 02:41:05,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2023-04-01 02:41:05,632 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:41:05,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:41:05,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-04-01 02:41:05,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-04-01 02:41:05,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:41:05,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-04-01 02:41:05,640 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 16 [2023-04-01 02:41:05,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:41:05,640 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-04-01 02:41:05,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:41:05,641 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-04-01 02:41:05,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-01 02:41:05,642 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:41:05,642 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:41:05,647 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 02:41:05,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:05,847 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:41:05,848 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:41:05,848 INFO L85 PathProgramCache]: Analyzing trace with hash -278225462, now seen corresponding path program 2 times [2023-04-01 02:41:05,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:41:05,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963337161] [2023-04-01 02:41:05,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:41:05,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:41:05,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:41:05,952 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 02:41:05,952 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:41:05,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963337161] [2023-04-01 02:41:05,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963337161] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:41:05,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619335607] [2023-04-01 02:41:05,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:41:05,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:05,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:41:05,955 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 02:41:05,957 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 02:41:06,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 02:41:06,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:41:06,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 02:41:06,021 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:41:06,036 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 02:41:06,037 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:41:06,059 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 02:41:06,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619335607] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:41:06,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [825163264] [2023-04-01 02:41:06,062 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-04-01 02:41:06,062 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:41:06,063 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:41:06,063 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:41:06,063 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:41:06,104 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:41:06,244 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2023-04-01 02:41:06,248 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:41:06,251 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:41:06,438 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '516#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#bb~0.base_BEFORE_CALL_2| Int) (|v_main_~#bb~0.offset_BEFORE_CALL_2| Int)) (< (select (select |#memory_int| |v_main_~#bb~0.base_BEFORE_CALL_2|) |v_main_~#bb~0.offset_BEFORE_CALL_2|) 0)))' at error location [2023-04-01 02:41:06,439 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:41:06,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:41:06,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-01 02:41:06,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880462927] [2023-04-01 02:41:06,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:41:06,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 02:41:06,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:41:06,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 02:41:06,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2023-04-01 02:41:06,440 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:41:06,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:41:06,471 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2023-04-01 02:41:06,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 02:41:06,472 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-04-01 02:41:06,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:41:06,472 INFO L225 Difference]: With dead ends: 40 [2023-04-01 02:41:06,472 INFO L226 Difference]: Without dead ends: 29 [2023-04-01 02:41:06,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2023-04-01 02:41:06,473 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:41:06,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:41:06,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-04-01 02:41:06,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-04-01 02:41:06,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:41:06,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2023-04-01 02:41:06,477 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 19 [2023-04-01 02:41:06,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:41:06,477 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2023-04-01 02:41:06,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:41:06,477 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2023-04-01 02:41:06,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 02:41:06,477 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:41:06,477 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:41:06,483 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 02:41:06,683 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,SelfDestructingSolverStorable3 [2023-04-01 02:41:06,683 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:41:06,683 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:41:06,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1079441194, now seen corresponding path program 3 times [2023-04-01 02:41:06,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:41:06,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183333073] [2023-04-01 02:41:06,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:41:06,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:41:06,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:41:06,825 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-01 02:41:06,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:41:06,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183333073] [2023-04-01 02:41:06,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183333073] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:41:06,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482822314] [2023-04-01 02:41:06,825 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 02:41:06,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:06,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:41:06,826 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 02:41:06,829 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 02:41:06,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 02:41:06,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:41:06,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 02:41:06,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:41:06,937 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-01 02:41:06,938 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:41:06,986 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-01 02:41:06,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482822314] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:41:06,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1908577730] [2023-04-01 02:41:06,988 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-04-01 02:41:06,988 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:41:06,988 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:41:06,988 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:41:06,988 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:41:07,005 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:41:07,157 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2023-04-01 02:41:07,163 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:41:07,166 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:41:07,366 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '805#(and (exists ((|v_main_~#bb~0.offset_BEFORE_CALL_3| Int) (|v_main_~#bb~0.base_BEFORE_CALL_3| Int)) (< (select (select |#memory_int| |v_main_~#bb~0.base_BEFORE_CALL_3|) |v_main_~#bb~0.offset_BEFORE_CALL_3|) 0)) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 02:41:07,366 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:41:07,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:41:07,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-04-01 02:41:07,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026878358] [2023-04-01 02:41:07,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:41:07,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 02:41:07,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:41:07,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 02:41:07,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2023-04-01 02:41:07,368 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:41:07,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:41:07,404 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2023-04-01 02:41:07,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 02:41:07,405 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-04-01 02:41:07,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:41:07,406 INFO L225 Difference]: With dead ends: 54 [2023-04-01 02:41:07,406 INFO L226 Difference]: Without dead ends: 35 [2023-04-01 02:41:07,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2023-04-01 02:41:07,407 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:41:07,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:41:07,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-04-01 02:41:07,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-04-01 02:41:07,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:41:07,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2023-04-01 02:41:07,416 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 25 [2023-04-01 02:41:07,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:41:07,416 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2023-04-01 02:41:07,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:41:07,417 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2023-04-01 02:41:07,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-01 02:41:07,418 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:41:07,418 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:41:07,425 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 02:41:07,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:07,628 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:41:07,628 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:41:07,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1040636374, now seen corresponding path program 4 times [2023-04-01 02:41:07,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:41:07,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731771544] [2023-04-01 02:41:07,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:41:07,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:41:07,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:41:07,824 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-01 02:41:07,824 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:41:07,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731771544] [2023-04-01 02:41:07,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731771544] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:41:07,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143238954] [2023-04-01 02:41:07,825 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 02:41:07,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:07,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:41:07,826 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 02:41:07,828 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 02:41:07,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:41:07,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 02:41:07,917 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:41:07,940 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-01 02:41:07,940 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:41:08,086 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-01 02:41:08,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143238954] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:41:08,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1772155595] [2023-04-01 02:41:08,090 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-04-01 02:41:08,091 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:41:08,091 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:41:08,091 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:41:08,091 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:41:08,130 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:41:08,275 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2023-04-01 02:41:08,280 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:41:08,283 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:41:08,488 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1182#(and (exists ((|v_main_~#bb~0.offset_BEFORE_CALL_4| Int) (|v_main_~#bb~0.base_BEFORE_CALL_4| Int)) (< (select (select |#memory_int| |v_main_~#bb~0.base_BEFORE_CALL_4|) |v_main_~#bb~0.offset_BEFORE_CALL_4|) 0)) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 02:41:08,488 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:41:08,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:41:08,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-04-01 02:41:08,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682146839] [2023-04-01 02:41:08,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:41:08,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 02:41:08,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:41:08,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 02:41:08,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=928, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 02:41:08,490 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:41:08,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:41:08,539 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2023-04-01 02:41:08,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-01 02:41:08,540 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2023-04-01 02:41:08,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:41:08,540 INFO L225 Difference]: With dead ends: 66 [2023-04-01 02:41:08,540 INFO L226 Difference]: Without dead ends: 47 [2023-04-01 02:41:08,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=928, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 02:41:08,541 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:41:08,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:41:08,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-04-01 02:41:08,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-04-01 02:41:08,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:41:08,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2023-04-01 02:41:08,546 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 31 [2023-04-01 02:41:08,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:41:08,546 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2023-04-01 02:41:08,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:41:08,546 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2023-04-01 02:41:08,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-01 02:41:08,547 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:41:08,547 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:41:08,559 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 02:41:08,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:08,747 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:41:08,748 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:41:08,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1942996010, now seen corresponding path program 5 times [2023-04-01 02:41:08,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:41:08,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049243972] [2023-04-01 02:41:08,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:41:08,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:41:08,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:41:09,249 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-01 02:41:09,249 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:41:09,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049243972] [2023-04-01 02:41:09,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049243972] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:41:09,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990747606] [2023-04-01 02:41:09,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:41:09,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:09,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:41:09,262 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 02:41:09,263 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 02:41:09,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 02:41:09,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:41:09,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 02:41:09,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:41:09,415 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2023-04-01 02:41:09,416 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:41:09,514 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2023-04-01 02:41:09,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990747606] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:41:09,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [11532497] [2023-04-01 02:41:09,517 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-04-01 02:41:09,517 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:41:09,517 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:41:09,517 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:41:09,517 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:41:09,530 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:41:09,657 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2023-04-01 02:41:09,666 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:41:09,669 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:41:09,972 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1689#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#bb~0.offset_BEFORE_CALL_5| Int) (|v_main_~#bb~0.base_BEFORE_CALL_5| Int)) (< (select (select |#memory_int| |v_main_~#bb~0.base_BEFORE_CALL_5|) |v_main_~#bb~0.offset_BEFORE_CALL_5|) 0)))' at error location [2023-04-01 02:41:09,972 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:41:09,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:41:09,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 7, 7] total 35 [2023-04-01 02:41:09,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527639251] [2023-04-01 02:41:09,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:41:09,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-04-01 02:41:09,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:41:09,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-04-01 02:41:09,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=1663, Unknown=0, NotChecked=0, Total=2070 [2023-04-01 02:41:09,974 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 35 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:41:10,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:41:10,384 INFO L93 Difference]: Finished difference Result 79 states and 97 transitions. [2023-04-01 02:41:10,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-04-01 02:41:10,385 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2023-04-01 02:41:10,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:41:10,385 INFO L225 Difference]: With dead ends: 79 [2023-04-01 02:41:10,386 INFO L226 Difference]: Without dead ends: 60 [2023-04-01 02:41:10,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1003 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1212, Invalid=3480, Unknown=0, NotChecked=0, Total=4692 [2023-04-01 02:41:10,387 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 50 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:41:10,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 78 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:41:10,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-04-01 02:41:10,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-04-01 02:41:10,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:41:10,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2023-04-01 02:41:10,392 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 43 [2023-04-01 02:41:10,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:41:10,392 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2023-04-01 02:41:10,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:41:10,392 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2023-04-01 02:41:10,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-01 02:41:10,393 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:41:10,393 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:41:10,407 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 02:41:10,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:10,599 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:41:10,599 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:41:10,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1637975954, now seen corresponding path program 6 times [2023-04-01 02:41:10,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:41:10,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289349111] [2023-04-01 02:41:10,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:41:10,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:41:10,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:41:11,148 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-04-01 02:41:11,149 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:41:11,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289349111] [2023-04-01 02:41:11,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289349111] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:41:11,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258036969] [2023-04-01 02:41:11,149 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 02:41:11,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:11,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:41:11,150 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 02:41:11,154 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 02:41:11,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 02:41:11,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:41:11,263 INFO L262 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-01 02:41:11,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:41:11,296 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-04-01 02:41:11,296 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:41:11,938 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-04-01 02:41:11,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258036969] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:41:11,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1838689078] [2023-04-01 02:41:11,940 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-04-01 02:41:11,940 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:41:11,940 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:41:11,940 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:41:11,940 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:41:11,965 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:41:12,080 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2023-04-01 02:41:12,086 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:41:12,088 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:41:12,350 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2388#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#bb~0.offset_BEFORE_CALL_6| Int) (|v_main_~#bb~0.base_BEFORE_CALL_6| Int)) (< (select (select |#memory_int| |v_main_~#bb~0.base_BEFORE_CALL_6|) |v_main_~#bb~0.offset_BEFORE_CALL_6|) 0)))' at error location [2023-04-01 02:41:12,350 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:41:12,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:41:12,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2023-04-01 02:41:12,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560438797] [2023-04-01 02:41:12,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:41:12,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-04-01 02:41:12,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:41:12,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-04-01 02:41:12,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1307, Invalid=2475, Unknown=0, NotChecked=0, Total=3782 [2023-04-01 02:41:12,353 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand has 51 states, 51 states have (on average 1.196078431372549) internal successors, (61), 51 states have internal predecessors, (61), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:41:12,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:41:12,451 INFO L93 Difference]: Finished difference Result 116 states and 146 transitions. [2023-04-01 02:41:12,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-04-01 02:41:12,451 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.196078431372549) internal successors, (61), 51 states have internal predecessors, (61), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2023-04-01 02:41:12,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:41:12,452 INFO L225 Difference]: With dead ends: 116 [2023-04-01 02:41:12,452 INFO L226 Difference]: Without dead ends: 85 [2023-04-01 02:41:12,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1307, Invalid=2475, Unknown=0, NotChecked=0, Total=3782 [2023-04-01 02:41:12,454 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:41:12,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:41:12,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-04-01 02:41:12,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2023-04-01 02:41:12,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 79 states have (on average 1.0506329113924051) internal successors, (83), 79 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:41:12,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2023-04-01 02:41:12,460 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 56 [2023-04-01 02:41:12,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:41:12,460 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2023-04-01 02:41:12,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.196078431372549) internal successors, (61), 51 states have internal predecessors, (61), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:41:12,460 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2023-04-01 02:41:12,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-04-01 02:41:12,461 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:41:12,461 INFO L195 NwaCegarLoop]: trace histogram [48, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:41:12,471 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 02:41:12,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:12,662 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:41:12,662 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:41:12,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1691182742, now seen corresponding path program 7 times [2023-04-01 02:41:12,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:41:12,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826834555] [2023-04-01 02:41:12,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:41:12,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:41:12,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:41:14,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1286 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-04-01 02:41:14,386 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:41:14,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826834555] [2023-04-01 02:41:14,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826834555] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:41:14,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053429786] [2023-04-01 02:41:14,387 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 02:41:14,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:14,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:41:14,388 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 02:41:14,390 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 02:41:14,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:41:14,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 50 conjunts are in the unsatisfiable core [2023-04-01 02:41:14,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:41:14,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1286 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-04-01 02:41:14,617 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:41:16,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1286 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-04-01 02:41:16,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053429786] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:41:16,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1981968130] [2023-04-01 02:41:16,901 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-04-01 02:41:16,901 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:41:16,901 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:41:16,901 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:41:16,901 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:41:16,917 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:41:17,014 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2023-04-01 02:41:17,017 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:41:17,019 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:41:17,388 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3365#(and (exists ((|v_main_~#bb~0.offset_BEFORE_CALL_7| Int) (|v_main_~#bb~0.base_BEFORE_CALL_7| Int)) (< (select (select |#memory_int| |v_main_~#bb~0.base_BEFORE_CALL_7|) |v_main_~#bb~0.offset_BEFORE_CALL_7|) 0)) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 02:41:17,388 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:41:17,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:41:17,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 101 [2023-04-01 02:41:17,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009037498] [2023-04-01 02:41:17,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:41:17,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-04-01 02:41:17,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:41:17,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-04-01 02:41:17,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5082, Invalid=7350, Unknown=0, NotChecked=0, Total=12432 [2023-04-01 02:41:17,397 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 101 states, 101 states have (on average 1.099009900990099) internal successors, (111), 101 states have internal predecessors, (111), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:41:17,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:41:17,520 INFO L93 Difference]: Finished difference Result 166 states and 221 transitions. [2023-04-01 02:41:17,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-04-01 02:41:17,520 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.099009900990099) internal successors, (111), 101 states have internal predecessors, (111), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2023-04-01 02:41:17,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:41:17,521 INFO L225 Difference]: With dead ends: 166 [2023-04-01 02:41:17,521 INFO L226 Difference]: Without dead ends: 135 [2023-04-01 02:41:17,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1834 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5082, Invalid=7350, Unknown=0, NotChecked=0, Total=12432 [2023-04-01 02:41:17,524 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:41:17,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:41:17,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-04-01 02:41:17,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2023-04-01 02:41:17,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 129 states have (on average 1.0310077519379846) internal successors, (133), 129 states have internal predecessors, (133), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:41:17,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 138 transitions. [2023-04-01 02:41:17,531 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 138 transitions. Word has length 81 [2023-04-01 02:41:17,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:41:17,531 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 138 transitions. [2023-04-01 02:41:17,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.099009900990099) internal successors, (111), 101 states have internal predecessors, (111), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:41:17,532 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 138 transitions. [2023-04-01 02:41:17,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-04-01 02:41:17,533 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:41:17,533 INFO L195 NwaCegarLoop]: trace histogram [98, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:41:17,542 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 02:41:17,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:17,739 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:41:17,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:41:17,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1571768726, now seen corresponding path program 8 times [2023-04-01 02:41:17,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:41:17,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692552287] [2023-04-01 02:41:17,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:41:17,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:41:17,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:41:22,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4961 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-04-01 02:41:22,511 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:41:22,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692552287] [2023-04-01 02:41:22,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692552287] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:41:22,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499790054] [2023-04-01 02:41:22,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:41:22,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:22,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:41:22,512 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 02:41:22,514 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 02:41:23,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-04-01 02:41:23,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:41:23,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 02:41:23,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:41:23,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4961 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4906 trivial. 0 not checked. [2023-04-01 02:41:23,426 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:41:23,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4961 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4906 trivial. 0 not checked. [2023-04-01 02:41:23,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499790054] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:41:23,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [121609312] [2023-04-01 02:41:23,909 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-04-01 02:41:23,909 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:41:23,909 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:41:23,909 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:41:23,909 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:41:23,919 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:41:24,040 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2023-04-01 02:41:24,048 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:41:24,050 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:41:24,708 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4864#(and (exists ((|v_main_~#bb~0.offset_BEFORE_CALL_8| Int) (|v_main_~#bb~0.base_BEFORE_CALL_8| Int)) (< (select (select |#memory_int| |v_main_~#bb~0.base_BEFORE_CALL_8|) |v_main_~#bb~0.offset_BEFORE_CALL_8|) 0)) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 02:41:24,708 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:41:24,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:41:24,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 13, 13] total 123 [2023-04-01 02:41:24,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731165012] [2023-04-01 02:41:24,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:41:24,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2023-04-01 02:41:24,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:41:24,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2023-04-01 02:41:24,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5379, Invalid=12443, Unknown=0, NotChecked=0, Total=17822 [2023-04-01 02:41:24,714 INFO L87 Difference]: Start difference. First operand 135 states and 138 transitions. Second operand has 123 states, 123 states have (on average 1.113821138211382) internal successors, (137), 123 states have internal predecessors, (137), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:41:28,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:41:28,531 INFO L93 Difference]: Finished difference Result 191 states and 221 transitions. [2023-04-01 02:41:28,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2023-04-01 02:41:28,533 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.113821138211382) internal successors, (137), 123 states have internal predecessors, (137), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2023-04-01 02:41:28,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:41:28,534 INFO L225 Difference]: With dead ends: 191 [2023-04-01 02:41:28,534 INFO L226 Difference]: Without dead ends: 160 [2023-04-01 02:41:28,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8957 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=17556, Invalid=36500, Unknown=0, NotChecked=0, Total=54056 [2023-04-01 02:41:28,539 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 505 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 02:41:28,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [505 Valid, 111 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 02:41:28,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-04-01 02:41:28,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2023-04-01 02:41:28,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 154 states have (on average 1.025974025974026) internal successors, (158), 154 states have internal predecessors, (158), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:41:28,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 163 transitions. [2023-04-01 02:41:28,550 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 163 transitions. Word has length 131 [2023-04-01 02:41:28,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:41:28,551 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 163 transitions. [2023-04-01 02:41:28,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.113821138211382) internal successors, (137), 123 states have internal predecessors, (137), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:41:28,551 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 163 transitions. [2023-04-01 02:41:28,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-04-01 02:41:28,552 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:41:28,552 INFO L195 NwaCegarLoop]: trace histogram [99, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:41:28,561 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 02:41:28,757 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,SelfDestructingSolverStorable9 [2023-04-01 02:41:28,757 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:41:28,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:41:28,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1594448402, now seen corresponding path program 9 times [2023-04-01 02:41:28,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:41:28,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470511095] [2023-04-01 02:41:28,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:41:28,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:41:28,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:41:33,694 INFO L134 CoverageAnalysis]: Checked inductivity of 5456 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2023-04-01 02:41:33,694 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:41:33,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470511095] [2023-04-01 02:41:33,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470511095] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:41:33,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869499730] [2023-04-01 02:41:33,702 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 02:41:33,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:33,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:41:33,703 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 02:41:33,705 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 02:41:34,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 02:41:34,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:41:34,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 1266 conjuncts, 101 conjunts are in the unsatisfiable core [2023-04-01 02:41:34,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:41:34,193 INFO L134 CoverageAnalysis]: Checked inductivity of 5456 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2023-04-01 02:41:34,194 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:41:42,740 INFO L134 CoverageAnalysis]: Checked inductivity of 5456 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2023-04-01 02:41:42,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869499730] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:41:42,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [776563791] [2023-04-01 02:41:42,745 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-04-01 02:41:42,745 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:41:42,745 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:41:42,745 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:41:42,745 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:41:42,755 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:41:42,881 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2023-04-01 02:41:42,884 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:41:42,885 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:41:43,458 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6891#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#bb~0.base_BEFORE_CALL_9| Int) (|v_main_~#bb~0.offset_BEFORE_CALL_9| Int)) (< (select (select |#memory_int| |v_main_~#bb~0.base_BEFORE_CALL_9|) |v_main_~#bb~0.offset_BEFORE_CALL_9|) 0)))' at error location [2023-04-01 02:41:43,458 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:41:43,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:41:43,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102, 102] total 203 [2023-04-01 02:41:43,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298887419] [2023-04-01 02:41:43,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:41:43,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2023-04-01 02:41:43,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:41:43,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2023-04-01 02:41:43,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20535, Invalid=25047, Unknown=0, NotChecked=0, Total=45582 [2023-04-01 02:41:43,465 INFO L87 Difference]: Start difference. First operand 160 states and 163 transitions. Second operand has 203 states, 203 states have (on average 1.0492610837438423) internal successors, (213), 203 states have internal predecessors, (213), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:41:43,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:41:43,742 INFO L93 Difference]: Finished difference Result 316 states and 422 transitions. [2023-04-01 02:41:43,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2023-04-01 02:41:43,743 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0492610837438423) internal successors, (213), 203 states have internal predecessors, (213), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 156 [2023-04-01 02:41:43,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:41:43,744 INFO L225 Difference]: With dead ends: 316 [2023-04-01 02:41:43,744 INFO L226 Difference]: Without dead ends: 261 [2023-04-01 02:41:43,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 357 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3721 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=20535, Invalid=25047, Unknown=0, NotChecked=0, Total=45582 [2023-04-01 02:41:43,747 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:41:43,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:41:43,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2023-04-01 02:41:43,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2023-04-01 02:41:43,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 255 states have (on average 1.0156862745098039) internal successors, (259), 255 states have internal predecessors, (259), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:41:43,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 264 transitions. [2023-04-01 02:41:43,763 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 264 transitions. Word has length 156 [2023-04-01 02:41:43,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:41:43,763 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 264 transitions. [2023-04-01 02:41:43,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0492610837438423) internal successors, (213), 203 states have internal predecessors, (213), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:41:43,763 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 264 transitions. [2023-04-01 02:41:43,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2023-04-01 02:41:43,765 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:41:43,765 INFO L195 NwaCegarLoop]: trace histogram [200, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:41:43,775 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 02:41:43,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:41:43,973 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:41:43,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:41:43,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1552261654, now seen corresponding path program 10 times [2023-04-01 02:41:43,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:41:43,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273443068] [2023-04-01 02:41:43,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:41:43,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:41:44,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:42:01,573 INFO L134 CoverageAnalysis]: Checked inductivity of 20606 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2023-04-01 02:42:01,574 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:42:01,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273443068] [2023-04-01 02:42:01,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273443068] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:42:01,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711754914] [2023-04-01 02:42:01,574 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 02:42:01,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:42:01,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:42:01,575 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 02:42:01,576 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 02:42:02,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:42:02,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 2175 conjuncts, 202 conjunts are in the unsatisfiable core