/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/loops/sum_array-2-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:58:43,900 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:58:43,902 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:58:43,928 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:58:43,928 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:58:43,931 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:58:43,935 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:58:43,937 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:58:43,938 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:58:43,942 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:58:43,943 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:58:43,944 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:58:43,944 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:58:43,946 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:58:43,947 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:58:43,948 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:58:43,948 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:58:43,949 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:58:43,950 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:58:43,954 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:58:43,955 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:58:43,956 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:58:43,957 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:58:43,957 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:58:43,959 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:58:43,959 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:58:43,960 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:58:43,960 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:58:43,960 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:58:43,961 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:58:43,961 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:58:43,961 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:58:43,962 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:58:43,963 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:58:43,963 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:58:43,963 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:58:43,964 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:58:43,964 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:58:43,964 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:58:43,965 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:58:43,965 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:58:43,966 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-03-31 22:58:43,991 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:58:43,992 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:58:43,992 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:58:43,992 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:58:43,992 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:58:43,993 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:58:43,993 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:58:43,993 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:58:43,993 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:58:43,993 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:58:43,993 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:58:43,993 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:58:43,993 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:58:43,993 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:58:43,993 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:58:43,994 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:58:43,994 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:58:43,994 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:58:43,994 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:58:43,994 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:58:43,994 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:58:43,995 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:58:43,995 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:58:43,995 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:58:43,995 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:58:43,995 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:58:43,995 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:58:43,995 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:58:43,995 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:58:43,995 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:58:43,995 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:58:43,995 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:58:43,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:58:43,996 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:58:43,996 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:58:43,996 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:58:43,996 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:58:43,996 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:58:43,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:58:43,996 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:58:43,996 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:58:43,996 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:58:44,183 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:58:44,204 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:58:44,206 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:58:44,207 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:58:44,207 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:58:44,208 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/sum_array-2-2.i [2023-03-31 22:58:45,281 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:58:45,415 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:58:45,416 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/sum_array-2-2.i [2023-03-31 22:58:45,420 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/209792d57/c4a0d2bb6fb141128946096e7b51a1e9/FLAG8f3f134e8 [2023-03-31 22:58:45,431 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/209792d57/c4a0d2bb6fb141128946096e7b51a1e9 [2023-03-31 22:58:45,433 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:58:45,434 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:58:45,434 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:58:45,435 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:58:45,437 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:58:45,437 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:58:45" (1/1) ... [2023-03-31 22:58:45,438 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ec56d42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:58:45, skipping insertion in model container [2023-03-31 22:58:45,438 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:58:45" (1/1) ... [2023-03-31 22:58:45,443 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:58:45,456 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:58:45,549 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/loops/sum_array-2-2.i[940,953] [2023-03-31 22:58:45,575 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:58:45,582 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:58:45,592 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/loops/sum_array-2-2.i[940,953] [2023-03-31 22:58:45,602 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:58:45,611 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:58:45,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:58:45 WrapperNode [2023-03-31 22:58:45,612 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:58:45,613 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:58:45,613 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:58:45,613 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:58:45,620 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:58:45" (1/1) ... [2023-03-31 22:58:45,621 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:58:45" (1/1) ... [2023-03-31 22:58:45,633 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:58:45" (1/1) ... [2023-03-31 22:58:45,633 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:58:45" (1/1) ... [2023-03-31 22:58:45,639 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:58:45" (1/1) ... [2023-03-31 22:58:45,642 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:58:45" (1/1) ... [2023-03-31 22:58:45,643 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:58:45" (1/1) ... [2023-03-31 22:58:45,643 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:58:45" (1/1) ... [2023-03-31 22:58:45,645 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:58:45,645 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:58:45,646 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:58:45,646 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:58:45,646 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:58:45" (1/1) ... [2023-03-31 22:58:45,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:58:45,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:58:45,674 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 22:58:45,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 22:58:45,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:58:45,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:58:45,698 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:58:45,698 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-31 22:58:45,698 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 22:58:45,698 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:58:45,698 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:58:45,698 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:58:45,698 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-03-31 22:58:45,698 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-03-31 22:58:45,699 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:58:45,699 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:58:45,699 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-31 22:58:45,699 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:58:45,699 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 22:58:45,699 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-03-31 22:58:45,699 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:58:45,699 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-31 22:58:45,699 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:58:45,699 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:58:45,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:58:45,700 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:58:45,700 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:58:45,700 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:58:45,788 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:58:45,800 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:58:46,053 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:58:46,077 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:58:46,078 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-03-31 22:58:46,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:58:46 BoogieIcfgContainer [2023-03-31 22:58:46,079 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:58:46,081 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:58:46,081 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:58:46,083 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:58:46,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:58:45" (1/3) ... [2023-03-31 22:58:46,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58325546 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:58:46, skipping insertion in model container [2023-03-31 22:58:46,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:58:45" (2/3) ... [2023-03-31 22:58:46,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58325546 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:58:46, skipping insertion in model container [2023-03-31 22:58:46,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:58:46" (3/3) ... [2023-03-31 22:58:46,085 INFO L112 eAbstractionObserver]: Analyzing ICFG sum_array-2-2.i [2023-03-31 22:58:46,097 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:58:46,097 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:58:46,127 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:58:46,131 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;@12c18b27, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:58:46,131 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:58:46,134 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 19 states have internal predecessors, (29), 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) [2023-03-31 22:58:46,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-03-31 22:58:46,141 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:58:46,142 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:58:46,142 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:58:46,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:58:46,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1483901021, now seen corresponding path program 1 times [2023-03-31 22:58:46,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:58:46,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572243621] [2023-03-31 22:58:46,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:58:46,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:58:46,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:58:46,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:58:46,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:58:46,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572243621] [2023-03-31 22:58:46,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572243621] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:58:46,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:58:46,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:58:46,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449516644] [2023-03-31 22:58:46,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:58:46,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:58:46,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:58:46,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:58:46,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:58:46,542 INFO L87 Difference]: Start difference. First operand has 26 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 19 states have internal predecessors, (29), 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 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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) [2023-03-31 22:58:46,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:58:46,644 INFO L93 Difference]: Finished difference Result 60 states and 88 transitions. [2023-03-31 22:58:46,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 22:58:46,646 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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 [2023-03-31 22:58:46,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:58:46,652 INFO L225 Difference]: With dead ends: 60 [2023-03-31 22:58:46,653 INFO L226 Difference]: Without dead ends: 32 [2023-03-31 22:58:46,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:58:46,659 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 12 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:58:46,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 84 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 22:58:46,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-03-31 22:58:46,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2023-03-31 22:58:46,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 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) [2023-03-31 22:58:46,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2023-03-31 22:58:46,686 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 14 [2023-03-31 22:58:46,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:58:46,686 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2023-03-31 22:58:46,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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) [2023-03-31 22:58:46,686 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2023-03-31 22:58:46,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-03-31 22:58:46,687 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:58:46,687 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:58:46,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:58:46,687 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:58:46,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:58:46,688 INFO L85 PathProgramCache]: Analyzing trace with hash -131632132, now seen corresponding path program 1 times [2023-03-31 22:58:46,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:58:46,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512395575] [2023-03-31 22:58:46,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:58:46,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:58:46,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:58:47,917 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 22:58:47,918 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:58:47,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512395575] [2023-03-31 22:58:47,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512395575] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:58:47,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581759956] [2023-03-31 22:58:47,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:58:47,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:58:47,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:58:47,921 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:58:47,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 22:58:47,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:58:48,000 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 31 conjunts are in the unsatisfiable core [2023-03-31 22:58:48,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:58:48,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-03-31 22:58:48,160 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-03-31 22:58:48,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 24 [2023-03-31 22:58:48,231 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 22:58:48,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2023-03-31 22:58:48,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 22:58:48,268 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:58:48,430 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 22:58:48,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 193 treesize of output 197 [2023-03-31 22:58:49,052 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 22:58:49,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 82 [2023-03-31 22:58:49,077 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-03-31 22:58:49,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 34 [2023-03-31 22:58:49,092 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-03-31 22:58:49,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 1 [2023-03-31 22:58:49,103 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-03-31 22:58:49,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 81 [2023-03-31 22:58:49,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 42 [2023-03-31 22:58:49,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-03-31 22:58:49,409 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-03-31 22:58:49,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 196 treesize of output 149 [2023-03-31 22:58:49,455 INFO L321 Elim1Store]: treesize reduction 10, result has 84.1 percent of original size [2023-03-31 22:58:49,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 246 treesize of output 234 [2023-03-31 22:58:49,649 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 22:58:49,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 238 treesize of output 236 [2023-03-31 22:58:49,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 180 treesize of output 140 [2023-03-31 22:58:49,744 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-03-31 22:58:49,864 INFO L321 Elim1Store]: treesize reduction 15, result has 86.2 percent of original size [2023-03-31 22:58:49,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 597 treesize of output 464 [2023-03-31 22:58:50,480 INFO L321 Elim1Store]: treesize reduction 15, result has 86.2 percent of original size [2023-03-31 22:58:50,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 597 treesize of output 464 [2023-03-31 22:58:50,889 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 22:58:50,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 76 treesize of output 138 [2023-03-31 22:58:51,110 INFO L321 Elim1Store]: treesize reduction 15, result has 86.2 percent of original size [2023-03-31 22:58:51,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 597 treesize of output 464 [2023-03-31 22:58:51,604 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-03-31 22:58:51,640 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 22:58:51,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 238 treesize of output 236 [2023-03-31 22:58:52,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 22:58:52,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581759956] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:58:52,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1498573909] [2023-03-31 22:58:52,172 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-03-31 22:58:52,172 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:58:52,175 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:58:52,178 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:58:52,179 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:58:52,214 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 22:58:52,445 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 37 for LOIs [2023-03-31 22:58:52,453 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 22:58:52,455 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 22:58:52,964 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '298#(and (exists ((|v_main_~#C~0.base_BEFORE_CALL_1| Int) (|v_main_~#A~0.base_BEFORE_CALL_1| Int) (|v_main_~#C~0.offset_BEFORE_CALL_1| Int) (|v_main_~#A~0.offset_BEFORE_CALL_1| Int) (|v_main_~#B~0.offset_BEFORE_CALL_1| Int) (|v_main_~#B~0.base_BEFORE_CALL_1| Int)) (not (= (select (select |#memory_int| |v_main_~#C~0.base_BEFORE_CALL_1|) |v_main_~#C~0.offset_BEFORE_CALL_1|) (+ (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_1|) |v_main_~#A~0.offset_BEFORE_CALL_1|) (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_1|) |v_main_~#B~0.offset_BEFORE_CALL_1|))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 22:58:52,965 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 22:58:52,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 22:58:52,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 20 [2023-03-31 22:58:52,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062922972] [2023-03-31 22:58:52,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 22:58:52,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-03-31 22:58:52,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:58:52,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-03-31 22:58:52,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=876, Unknown=0, NotChecked=0, Total=992 [2023-03-31 22:58:52,968 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:58:53,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:58:53,255 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2023-03-31 22:58:53,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-31 22:58:53,256 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-03-31 22:58:53,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:58:53,257 INFO L225 Difference]: With dead ends: 38 [2023-03-31 22:58:53,257 INFO L226 Difference]: Without dead ends: 36 [2023-03-31 22:58:53,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=168, Invalid=1092, Unknown=0, NotChecked=0, Total=1260 [2023-03-31 22:58:53,258 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 36 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:58:53,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 79 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 22:58:53,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-03-31 22:58:53,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2023-03-31 22:58:53,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:58:53,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2023-03-31 22:58:53,264 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 21 [2023-03-31 22:58:53,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:58:53,264 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2023-03-31 22:58:53,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:58:53,265 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2023-03-31 22:58:53,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-03-31 22:58:53,265 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:58:53,265 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:58:53,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 22:58:53,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:58:53,470 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:58:53,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:58:53,471 INFO L85 PathProgramCache]: Analyzing trace with hash 645722346, now seen corresponding path program 1 times [2023-03-31 22:58:53,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:58:53,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656278371] [2023-03-31 22:58:53,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:58:53,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:58:53,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:58:53,631 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 22:58:53,631 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:58:53,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656278371] [2023-03-31 22:58:53,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656278371] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:58:53,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860026693] [2023-03-31 22:58:53,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:58:53,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:58:53,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:58:53,633 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:58:53,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 22:58:53,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:58:53,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 10 conjunts are in the unsatisfiable core [2023-03-31 22:58:53,693 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:58:53,745 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 22:58:53,746 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:58:53,839 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 22:58:53,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860026693] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:58:53,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1937251321] [2023-03-31 22:58:53,856 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-03-31 22:58:53,856 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:58:53,857 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:58:53,857 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:58:53,857 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:58:53,871 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 22:58:54,156 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 66 for LOIs [2023-03-31 22:58:54,199 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 22:58:54,202 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 22:58:58,873 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '595#(and (exists ((|v_main_#t~mem14_BEFORE_CALL_7| Int) (v_main_~i~0_BEFORE_CALL_8 Int) (v_main_~M~0_BEFORE_CALL_8 Int) (|v_main_#t~mem15_BEFORE_CALL_7| Int) (|v_main_~#C~0.offset_BEFORE_CALL_6| Int) (|v_main_~#B~0.base_BEFORE_CALL_6| Int) (|v_main_#t~mem16_BEFORE_CALL_7| Int) (|v_main_~#B~0.offset_BEFORE_CALL_6| Int) (|v_main_~#C~0.base_BEFORE_CALL_6| Int) (|v_main_~#A~0.offset_BEFORE_CALL_6| Int) (|v_main_~#A~0.base_BEFORE_CALL_6| Int)) (and (or (and (= |v_main_#t~mem15_BEFORE_CALL_7| (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_6|) (+ |v_main_~#B~0.offset_BEFORE_CALL_6| (* (mod v_main_~i~0_BEFORE_CALL_8 4294967296) 4)))) (<= (mod v_main_~i~0_BEFORE_CALL_8 4294967296) 2147483647)) (and (< 2147483647 (mod v_main_~i~0_BEFORE_CALL_8 4294967296)) (= (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_6|) (+ (- 17179869184) |v_main_~#B~0.offset_BEFORE_CALL_6| (* (mod v_main_~i~0_BEFORE_CALL_8 4294967296) 4))) |v_main_#t~mem15_BEFORE_CALL_7|))) (or (and (= |v_main_#t~mem14_BEFORE_CALL_7| (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_6|) (+ |v_main_~#A~0.offset_BEFORE_CALL_6| (* (mod v_main_~i~0_BEFORE_CALL_8 4294967296) 4)))) (<= (mod v_main_~i~0_BEFORE_CALL_8 4294967296) 2147483647)) (and (= |v_main_#t~mem14_BEFORE_CALL_7| (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_6|) (+ (- 17179869184) |v_main_~#A~0.offset_BEFORE_CALL_6| (* (mod v_main_~i~0_BEFORE_CALL_8 4294967296) 4)))) (< 2147483647 (mod v_main_~i~0_BEFORE_CALL_8 4294967296)))) (not (= (+ |v_main_#t~mem14_BEFORE_CALL_7| |v_main_#t~mem15_BEFORE_CALL_7|) |v_main_#t~mem16_BEFORE_CALL_7|)) (< (mod v_main_~i~0_BEFORE_CALL_8 4294967296) (mod v_main_~M~0_BEFORE_CALL_8 4294967296)) (<= 0 v_main_~i~0_BEFORE_CALL_8) (or (and (= (select (select |#memory_int| |v_main_~#C~0.base_BEFORE_CALL_6|) (+ |v_main_~#C~0.offset_BEFORE_CALL_6| (* (mod v_main_~i~0_BEFORE_CALL_8 4294967296) 4))) |v_main_#t~mem16_BEFORE_CALL_7|) (<= (mod v_main_~i~0_BEFORE_CALL_8 4294967296) 2147483647)) (and (= |v_main_#t~mem16_BEFORE_CALL_7| (select (select |#memory_int| |v_main_~#C~0.base_BEFORE_CALL_6|) (+ (- 17179869184) |v_main_~#C~0.offset_BEFORE_CALL_6| (* (mod v_main_~i~0_BEFORE_CALL_8 4294967296) 4)))) (< 2147483647 (mod v_main_~i~0_BEFORE_CALL_8 4294967296)))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 22:58:58,873 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 22:58:58,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 22:58:58,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-03-31 22:58:58,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531835077] [2023-03-31 22:58:58,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 22:58:58,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-31 22:58:58,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:58:58,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-31 22:58:58,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=520, Unknown=3, NotChecked=0, Total=600 [2023-03-31 22:58:58,875 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:58:59,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:58:59,022 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2023-03-31 22:58:59,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 22:58:59,024 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2023-03-31 22:58:59,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:58:59,024 INFO L225 Difference]: With dead ends: 76 [2023-03-31 22:58:59,024 INFO L226 Difference]: Without dead ends: 46 [2023-03-31 22:58:59,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 63 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=77, Invalid=520, Unknown=3, NotChecked=0, Total=600 [2023-03-31 22:58:59,025 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 15 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:58:59,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 80 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 22:58:59,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-03-31 22:58:59,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 38. [2023-03-31 22:58:59,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:58:59,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2023-03-31 22:58:59,032 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 28 [2023-03-31 22:58:59,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:58:59,037 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2023-03-31 22:58:59,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:58:59,037 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2023-03-31 22:58:59,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-03-31 22:58:59,038 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:58:59,038 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:58:59,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-03-31 22:58:59,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-03-31 22:58:59,238 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:58:59,239 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:58:59,239 INFO L85 PathProgramCache]: Analyzing trace with hash -544171319, now seen corresponding path program 2 times [2023-03-31 22:58:59,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:58:59,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924384504] [2023-03-31 22:58:59,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:58:59,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:58:59,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:59:00,846 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 22:59:00,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:59:00,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924384504] [2023-03-31 22:59:00,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924384504] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:59:00,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534887247] [2023-03-31 22:59:00,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 22:59:00,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:59:00,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:59:00,856 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:59:00,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 22:59:00,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-03-31 22:59:00,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 22:59:00,955 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 48 conjunts are in the unsatisfiable core [2023-03-31 22:59:00,960 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:59:00,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-03-31 22:59:01,199 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-03-31 22:59:01,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2023-03-31 22:59:05,635 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 22:59:05,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 23 [2023-03-31 22:59:05,676 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-03-31 22:59:05,676 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:59:06,056 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 22:59:06,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 217 treesize of output 221 [2023-03-31 22:59:06,723 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 22:59:06,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 212 treesize of output 200 [2023-03-31 22:59:06,755 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 22:59:06,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 84 [2023-03-31 22:59:06,770 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-03-31 22:59:07,012 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 22:59:07,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 170 treesize of output 136 [2023-03-31 22:59:07,046 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 22:59:07,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 420 treesize of output 366 [2023-03-31 22:59:07,968 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-03-31 22:59:07,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 285 treesize of output 1 [2023-03-31 22:59:07,975 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-03-31 22:59:07,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 1 [2023-03-31 22:59:07,986 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 22:59:07,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 232 treesize of output 170 [2023-03-31 22:59:08,010 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 22:59:08,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 163 treesize of output 160 [2023-03-31 22:59:08,213 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-03-31 22:59:08,324 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 22:59:08,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 151 treesize of output 203 [2023-03-31 22:59:09,084 INFO L321 Elim1Store]: treesize reduction 116, result has 0.9 percent of original size [2023-03-31 22:59:09,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 212 treesize of output 1 [2023-03-31 22:59:09,097 INFO L321 Elim1Store]: treesize reduction 116, result has 0.9 percent of original size [2023-03-31 22:59:09,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 703 treesize of output 1 [2023-03-31 22:59:09,108 INFO L321 Elim1Store]: treesize reduction 116, result has 0.9 percent of original size [2023-03-31 22:59:09,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 553 treesize of output 1 [2023-03-31 22:59:09,118 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-03-31 22:59:09,126 INFO L321 Elim1Store]: treesize reduction 116, result has 0.9 percent of original size [2023-03-31 22:59:09,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 1 [2023-03-31 22:59:09,135 INFO L321 Elim1Store]: treesize reduction 116, result has 0.9 percent of original size [2023-03-31 22:59:09,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 200 treesize of output 1 [2023-03-31 22:59:09,144 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-03-31 22:59:09,150 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-03-31 22:59:09,187 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 22:59:09,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 133 [2023-03-31 22:59:09,642 INFO L321 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2023-03-31 22:59:09,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 212 treesize of output 1 [2023-03-31 22:59:09,649 INFO L321 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2023-03-31 22:59:09,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 703 treesize of output 1 [2023-03-31 22:59:09,656 INFO L321 Elim1Store]: treesize reduction 34, result has 2.9 percent of original size [2023-03-31 22:59:09,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 212 treesize of output 1 [2023-03-31 22:59:09,662 INFO L321 Elim1Store]: treesize reduction 34, result has 2.9 percent of original size [2023-03-31 22:59:09,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 1 [2023-03-31 22:59:09,670 INFO L321 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2023-03-31 22:59:09,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 553 treesize of output 1 [2023-03-31 22:59:09,695 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-03-31 22:59:09,775 INFO L321 Elim1Store]: treesize reduction 15, result has 87.2 percent of original size [2023-03-31 22:59:09,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 212 treesize of output 213 [2023-03-31 22:59:10,118 INFO L321 Elim1Store]: treesize reduction 15, result has 87.2 percent of original size [2023-03-31 22:59:10,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 703 treesize of output 512 [2023-03-31 22:59:10,876 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 22:59:10,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 59 [2023-03-31 22:59:10,892 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-03-31 22:59:10,898 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-03-31 22:59:10,943 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 22:59:10,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 281 treesize of output 241 [2023-03-31 22:59:11,535 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 22:59:11,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 92 treesize of output 138 [2023-03-31 22:59:11,793 INFO L321 Elim1Store]: treesize reduction 116, result has 0.9 percent of original size [2023-03-31 22:59:11,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 703 treesize of output 1 [2023-03-31 22:59:11,797 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-03-31 22:59:11,810 INFO L321 Elim1Store]: treesize reduction 116, result has 0.9 percent of original size [2023-03-31 22:59:11,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 200 treesize of output 1 [2023-03-31 22:59:12,126 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-03-31 22:59:12,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534887247] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:59:12,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1830646697] [2023-03-31 22:59:12,128 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-03-31 22:59:12,128 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:59:12,128 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:59:12,128 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:59:12,128 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:59:12,152 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 22:59:12,338 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 66 for LOIs [2023-03-31 22:59:12,370 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 22:59:12,372 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 22:59:17,445 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1019#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_#t~mem16_BEFORE_CALL_16| Int) (|v_main_#t~mem15_BEFORE_CALL_16| Int) (|v_main_#t~mem14_BEFORE_CALL_16| Int) (|v_main_~#B~0.base_BEFORE_CALL_15| Int) (|v_main_~#A~0.base_BEFORE_CALL_15| Int) (|v_main_~#C~0.base_BEFORE_CALL_15| Int) (|v_main_~#A~0.offset_BEFORE_CALL_15| Int) (|v_main_~#B~0.offset_BEFORE_CALL_15| Int) (|v_main_~#C~0.offset_BEFORE_CALL_15| Int) (v_main_~i~0_BEFORE_CALL_17 Int) (v_main_~M~0_BEFORE_CALL_17 Int)) (and (<= 0 v_main_~i~0_BEFORE_CALL_17) (or (and (= |v_main_#t~mem15_BEFORE_CALL_16| (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_15|) (+ |v_main_~#B~0.offset_BEFORE_CALL_15| (* (mod v_main_~i~0_BEFORE_CALL_17 4294967296) 4)))) (<= (mod v_main_~i~0_BEFORE_CALL_17 4294967296) 2147483647)) (and (< 2147483647 (mod v_main_~i~0_BEFORE_CALL_17 4294967296)) (= (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_15|) (+ (- 17179869184) |v_main_~#B~0.offset_BEFORE_CALL_15| (* (mod v_main_~i~0_BEFORE_CALL_17 4294967296) 4))) |v_main_#t~mem15_BEFORE_CALL_16|))) (or (and (< 2147483647 (mod v_main_~i~0_BEFORE_CALL_17 4294967296)) (= |v_main_#t~mem16_BEFORE_CALL_16| (select (select |#memory_int| |v_main_~#C~0.base_BEFORE_CALL_15|) (+ (- 17179869184) |v_main_~#C~0.offset_BEFORE_CALL_15| (* (mod v_main_~i~0_BEFORE_CALL_17 4294967296) 4))))) (and (= |v_main_#t~mem16_BEFORE_CALL_16| (select (select |#memory_int| |v_main_~#C~0.base_BEFORE_CALL_15|) (+ |v_main_~#C~0.offset_BEFORE_CALL_15| (* (mod v_main_~i~0_BEFORE_CALL_17 4294967296) 4)))) (<= (mod v_main_~i~0_BEFORE_CALL_17 4294967296) 2147483647))) (not (= (+ |v_main_#t~mem15_BEFORE_CALL_16| |v_main_#t~mem14_BEFORE_CALL_16|) |v_main_#t~mem16_BEFORE_CALL_16|)) (< (mod v_main_~i~0_BEFORE_CALL_17 4294967296) (mod v_main_~M~0_BEFORE_CALL_17 4294967296)) (or (and (< 2147483647 (mod v_main_~i~0_BEFORE_CALL_17 4294967296)) (= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_15|) (+ (- 17179869184) |v_main_~#A~0.offset_BEFORE_CALL_15| (* (mod v_main_~i~0_BEFORE_CALL_17 4294967296) 4))) |v_main_#t~mem14_BEFORE_CALL_16|)) (and (= |v_main_#t~mem14_BEFORE_CALL_16| (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_15|) (+ |v_main_~#A~0.offset_BEFORE_CALL_15| (* (mod v_main_~i~0_BEFORE_CALL_17 4294967296) 4)))) (<= (mod v_main_~i~0_BEFORE_CALL_17 4294967296) 2147483647))))))' at error location [2023-03-31 22:59:17,445 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 22:59:17,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 22:59:17,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 33 [2023-03-31 22:59:17,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246077960] [2023-03-31 22:59:17,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 22:59:17,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-03-31 22:59:17,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:59:17,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-03-31 22:59:17,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1955, Unknown=5, NotChecked=0, Total=2162 [2023-03-31 22:59:17,448 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 33 states, 32 states have (on average 2.0625) internal successors, (66), 30 states have internal predecessors, (66), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 22:59:19,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-31 22:59:32,767 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-31 22:59:35,490 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-31 22:59:35,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:59:35,527 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2023-03-31 22:59:35,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-03-31 22:59:35,527 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0625) internal successors, (66), 30 states have internal predecessors, (66), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 35 [2023-03-31 22:59:35,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:59:35,529 INFO L225 Difference]: With dead ends: 65 [2023-03-31 22:59:35,529 INFO L226 Difference]: Without dead ends: 63 [2023-03-31 22:59:35,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=572, Invalid=3974, Unknown=10, NotChecked=0, Total=4556 [2023-03-31 22:59:35,531 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 109 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 106 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2023-03-31 22:59:35,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 126 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 446 Invalid, 2 Unknown, 0 Unchecked, 5.7s Time] [2023-03-31 22:59:35,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-03-31 22:59:35,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2023-03-31 22:59:35,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 43 states have internal predecessors, (46), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2023-03-31 22:59:35,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2023-03-31 22:59:35,548 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 35 [2023-03-31 22:59:35,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:59:35,549 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2023-03-31 22:59:35,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0625) internal successors, (66), 30 states have internal predecessors, (66), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 22:59:35,549 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2023-03-31 22:59:35,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-03-31 22:59:35,551 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:59:35,551 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:59:35,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-03-31 22:59:35,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:59:35,757 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:59:35,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:59:35,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1912396620, now seen corresponding path program 3 times [2023-03-31 22:59:35,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:59:35,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033624373] [2023-03-31 22:59:35,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:59:35,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:59:35,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:59:35,985 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-03-31 22:59:35,985 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:59:35,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033624373] [2023-03-31 22:59:35,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033624373] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:59:35,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014527665] [2023-03-31 22:59:35,986 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 22:59:35,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:59:35,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:59:35,993 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:59:35,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 22:59:36,059 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 22:59:36,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 22:59:36,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2023-03-31 22:59:36,062 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:59:36,133 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-03-31 22:59:36,133 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:59:36,300 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-03-31 22:59:36,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014527665] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:59:36,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1033312760] [2023-03-31 22:59:36,302 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-03-31 22:59:36,302 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:59:36,302 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:59:36,302 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:59:36,302 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:59:36,317 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 22:59:36,527 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 66 for LOIs [2023-03-31 22:59:36,574 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 22:59:36,577 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 22:59:41,371 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1528#(and (exists ((v_main_~M~0_BEFORE_CALL_24 Int) (|v_main_~#B~0.base_BEFORE_CALL_22| Int) (|v_main_~#A~0.base_BEFORE_CALL_22| Int) (|v_main_#t~mem15_BEFORE_CALL_23| Int) (|v_main_#t~mem14_BEFORE_CALL_23| Int) (v_main_~i~0_BEFORE_CALL_24 Int) (|v_main_~#C~0.base_BEFORE_CALL_22| Int) (|v_main_~#A~0.offset_BEFORE_CALL_22| Int) (|v_main_#t~mem16_BEFORE_CALL_23| Int) (|v_main_~#B~0.offset_BEFORE_CALL_22| Int) (|v_main_~#C~0.offset_BEFORE_CALL_22| Int)) (and (or (and (= |v_main_#t~mem16_BEFORE_CALL_23| (select (select |#memory_int| |v_main_~#C~0.base_BEFORE_CALL_22|) (+ (- 17179869184) (* (mod v_main_~i~0_BEFORE_CALL_24 4294967296) 4) |v_main_~#C~0.offset_BEFORE_CALL_22|))) (< 2147483647 (mod v_main_~i~0_BEFORE_CALL_24 4294967296))) (and (= (select (select |#memory_int| |v_main_~#C~0.base_BEFORE_CALL_22|) (+ (* (mod v_main_~i~0_BEFORE_CALL_24 4294967296) 4) |v_main_~#C~0.offset_BEFORE_CALL_22|)) |v_main_#t~mem16_BEFORE_CALL_23|) (<= (mod v_main_~i~0_BEFORE_CALL_24 4294967296) 2147483647))) (or (and (< 2147483647 (mod v_main_~i~0_BEFORE_CALL_24 4294967296)) (= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_22|) (+ (- 17179869184) (* (mod v_main_~i~0_BEFORE_CALL_24 4294967296) 4) |v_main_~#A~0.offset_BEFORE_CALL_22|)) |v_main_#t~mem14_BEFORE_CALL_23|)) (and (= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_22|) (+ (* (mod v_main_~i~0_BEFORE_CALL_24 4294967296) 4) |v_main_~#A~0.offset_BEFORE_CALL_22|)) |v_main_#t~mem14_BEFORE_CALL_23|) (<= (mod v_main_~i~0_BEFORE_CALL_24 4294967296) 2147483647))) (<= 0 v_main_~i~0_BEFORE_CALL_24) (not (= (+ |v_main_#t~mem15_BEFORE_CALL_23| |v_main_#t~mem14_BEFORE_CALL_23|) |v_main_#t~mem16_BEFORE_CALL_23|)) (or (and (<= (mod v_main_~i~0_BEFORE_CALL_24 4294967296) 2147483647) (= |v_main_#t~mem15_BEFORE_CALL_23| (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_22|) (+ |v_main_~#B~0.offset_BEFORE_CALL_22| (* (mod v_main_~i~0_BEFORE_CALL_24 4294967296) 4))))) (and (< 2147483647 (mod v_main_~i~0_BEFORE_CALL_24 4294967296)) (= (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_22|) (+ (- 17179869184) |v_main_~#B~0.offset_BEFORE_CALL_22| (* (mod v_main_~i~0_BEFORE_CALL_24 4294967296) 4))) |v_main_#t~mem15_BEFORE_CALL_23|))) (< (mod v_main_~i~0_BEFORE_CALL_24 4294967296) (mod v_main_~M~0_BEFORE_CALL_24 4294967296)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 22:59:41,371 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 22:59:41,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 22:59:41,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-03-31 22:59:41,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305761531] [2023-03-31 22:59:41,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 22:59:41,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-03-31 22:59:41,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:59:41,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-03-31 22:59:41,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=818, Unknown=3, NotChecked=0, Total=930 [2023-03-31 22:59:41,373 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 22:59:41,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:59:41,681 INFO L93 Difference]: Finished difference Result 114 states and 131 transitions. [2023-03-31 22:59:41,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:59:41,682 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2023-03-31 22:59:41,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:59:41,683 INFO L225 Difference]: With dead ends: 114 [2023-03-31 22:59:41,683 INFO L226 Difference]: Without dead ends: 60 [2023-03-31 22:59:41,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 103 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=109, Invalid=818, Unknown=3, NotChecked=0, Total=930 [2023-03-31 22:59:41,684 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 32 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 22:59:41,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 157 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 22:59:41,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-03-31 22:59:41,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 52. [2023-03-31 22:59:41,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 43 states have internal predecessors, (46), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 22:59:41,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2023-03-31 22:59:41,693 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 43 [2023-03-31 22:59:41,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:59:41,693 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2023-03-31 22:59:41,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 22:59:41,693 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2023-03-31 22:59:41,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-03-31 22:59:41,694 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:59:41,694 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:59:41,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-31 22:59:41,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:59:41,895 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:59:41,895 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:59:41,895 INFO L85 PathProgramCache]: Analyzing trace with hash 912173468, now seen corresponding path program 4 times [2023-03-31 22:59:41,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:59:41,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392580989] [2023-03-31 22:59:41,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:59:41,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:59:41,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:59:44,321 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 22:59:44,322 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:59:44,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392580989] [2023-03-31 22:59:44,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392580989] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:59:44,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246238206] [2023-03-31 22:59:44,322 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 22:59:44,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:59:44,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:59:44,323 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:59:44,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 22:59:44,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:59:44,399 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 52 conjunts are in the unsatisfiable core [2023-03-31 22:59:44,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:59:44,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-03-31 22:59:44,721 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-03-31 22:59:44,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 30 [2023-03-31 22:59:45,238 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 22:59:45,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 27 [2023-03-31 22:59:45,294 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 22:59:45,295 INFO L327 TraceCheckSpWp]: Computing backward predicates...