/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 EqDomain -i ../sv-benchmarks/c/array-fpi/eqn2f.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 09:04:17,684 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 09:04:17,686 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 09:04:17,726 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 09:04:17,726 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 09:04:17,729 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 09:04:17,733 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 09:04:17,735 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 09:04:17,737 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 09:04:17,742 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 09:04:17,742 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 09:04:17,743 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 09:04:17,743 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 09:04:17,744 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 09:04:17,745 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 09:04:17,746 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 09:04:17,746 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 09:04:17,747 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 09:04:17,748 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 09:04:17,749 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 09:04:17,750 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 09:04:17,755 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 09:04:17,756 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 09:04:17,758 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 09:04:17,762 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 09:04:17,762 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 09:04:17,762 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 09:04:17,763 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 09:04:17,763 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 09:04:17,764 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 09:04:17,764 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 09:04:17,765 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 09:04:17,765 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 09:04:17,766 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 09:04:17,766 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 09:04:17,767 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 09:04:17,767 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 09:04:17,767 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 09:04:17,767 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 09:04:17,768 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 09:04:17,768 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 09:04:17,769 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 09:04:17,787 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 09:04:17,787 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 09:04:17,787 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 09:04:17,787 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 09:04:17,788 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 09:04:17,788 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 09:04:17,788 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 09:04:17,788 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 09:04:17,789 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 09:04:17,789 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 09:04:17,789 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 09:04:17,789 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 09:04:17,789 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 09:04:17,789 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 09:04:17,789 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 09:04:17,789 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 09:04:17,789 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 09:04:17,790 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 09:04:17,790 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 09:04:17,790 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 09:04:17,790 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 09:04:17,790 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 09:04:17,790 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 09:04:17,790 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 09:04:17,791 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 09:04:17,791 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 09:04:17,791 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 09:04:17,791 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 09:04:17,791 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 09:04:17,791 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 09:04:17,791 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 09:04:17,791 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 09:04:17,791 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:04:17,791 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 09:04:17,792 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 09:04:17,792 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 09:04:17,792 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 09:04:17,792 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 09:04:17,792 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 09:04:17,792 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 09:04:17,792 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 09:04:17,792 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 09:04:17,971 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 09:04:17,987 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 09:04:17,989 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 09:04:17,990 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 09:04:17,990 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 09:04:17,991 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/eqn2f.c [2023-04-01 09:04:19,069 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 09:04:19,230 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 09:04:19,231 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn2f.c [2023-04-01 09:04:19,235 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f82fef99a/0d8e679a112d4845a2af926b7743fd7f/FLAG4f40d529b [2023-04-01 09:04:19,247 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f82fef99a/0d8e679a112d4845a2af926b7743fd7f [2023-04-01 09:04:19,249 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 09:04:19,250 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 09:04:19,251 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 09:04:19,252 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 09:04:19,259 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 09:04:19,259 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:04:19" (1/1) ... [2023-04-01 09:04:19,260 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33efca5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:04:19, skipping insertion in model container [2023-04-01 09:04:19,260 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:04:19" (1/1) ... [2023-04-01 09:04:19,267 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 09:04:19,282 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 09:04:19,393 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn2f.c[588,601] [2023-04-01 09:04:19,408 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:04:19,417 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 09:04:19,428 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn2f.c[588,601] [2023-04-01 09:04:19,434 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:04:19,445 INFO L208 MainTranslator]: Completed translation [2023-04-01 09:04:19,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:04:19 WrapperNode [2023-04-01 09:04:19,446 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 09:04:19,447 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 09:04:19,447 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 09:04:19,447 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 09:04:19,455 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:04:19" (1/1) ... [2023-04-01 09:04:19,455 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:04:19" (1/1) ... [2023-04-01 09:04:19,465 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:04:19" (1/1) ... [2023-04-01 09:04:19,465 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:04:19" (1/1) ... [2023-04-01 09:04:19,477 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:04:19" (1/1) ... [2023-04-01 09:04:19,480 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:04:19" (1/1) ... [2023-04-01 09:04:19,481 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:04:19" (1/1) ... [2023-04-01 09:04:19,482 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:04:19" (1/1) ... [2023-04-01 09:04:19,484 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 09:04:19,485 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 09:04:19,485 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 09:04:19,485 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 09:04:19,486 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:04:19" (1/1) ... [2023-04-01 09:04:19,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:04:19,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:04:19,517 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 09:04:19,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 09:04:19,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 09:04:19,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 09:04:19,548 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 09:04:19,548 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 09:04:19,548 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 09:04:19,548 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 09:04:19,548 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 09:04:19,548 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 09:04:19,548 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 09:04:19,549 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 09:04:19,549 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 09:04:19,549 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 09:04:19,549 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 09:04:19,549 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 09:04:19,549 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 09:04:19,549 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 09:04:19,549 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 09:04:19,549 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 09:04:19,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 09:04:19,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 09:04:19,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 09:04:19,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 09:04:19,610 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 09:04:19,611 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 09:04:19,791 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 09:04:19,834 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 09:04:19,835 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 09:04:19,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:04:19 BoogieIcfgContainer [2023-04-01 09:04:19,837 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 09:04:19,839 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 09:04:19,839 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 09:04:19,842 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 09:04:19,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 09:04:19" (1/3) ... [2023-04-01 09:04:19,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4215b528 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:04:19, skipping insertion in model container [2023-04-01 09:04:19,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:04:19" (2/3) ... [2023-04-01 09:04:19,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4215b528 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:04:19, skipping insertion in model container [2023-04-01 09:04:19,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:04:19" (3/3) ... [2023-04-01 09:04:19,844 INFO L112 eAbstractionObserver]: Analyzing ICFG eqn2f.c [2023-04-01 09:04:19,859 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 09:04:19,859 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 09:04:19,909 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 09:04:19,916 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;@11b8f9e8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 09:04:19,930 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 09:04:19,934 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 09:04:19,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-01 09:04:19,941 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:04:19,941 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:04:19,942 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:04:19,946 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:04:19,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1001205354, now seen corresponding path program 1 times [2023-04-01 09:04:19,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:04:19,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715851820] [2023-04-01 09:04:19,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:04:19,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:04:20,082 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:04:20,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [739569438] [2023-04-01 09:04:20,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:04:20,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:04:20,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:04:20,086 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:04:20,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 09:04:20,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:04:20,214 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-01 09:04:20,225 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:04:20,394 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-04-01 09:04:20,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-04-01 09:04:20,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 09:04:20,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 09:04:20,526 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-04-01 09:04:20,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:04:20,655 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 09:04:20,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:04:20,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715851820] [2023-04-01 09:04:20,655 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:04:20,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739569438] [2023-04-01 09:04:20,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739569438] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:04:20,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:04:20,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-01 09:04:20,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155223228] [2023-04-01 09:04:20,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:04:20,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 09:04:20,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:04:20,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 09:04:20,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-04-01 09:04:20,718 INFO L87 Difference]: Start difference. First operand has 25 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:04:20,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:04:20,864 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2023-04-01 09:04:20,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 09:04:20,867 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2023-04-01 09:04:20,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:04:20,873 INFO L225 Difference]: With dead ends: 54 [2023-04-01 09:04:20,873 INFO L226 Difference]: Without dead ends: 33 [2023-04-01 09:04:20,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-04-01 09:04:20,881 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 16 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:04:20,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 96 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:04:20,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-01 09:04:20,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2023-04-01 09:04:20,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 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) [2023-04-01 09:04:20,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2023-04-01 09:04:20,925 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 17 [2023-04-01 09:04:20,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:04:20,926 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2023-04-01 09:04:20,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:04:20,927 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2023-04-01 09:04:20,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 09:04:20,928 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:04:20,928 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:04:20,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 09:04:21,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-01 09:04:21,134 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:04:21,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:04:21,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1191020082, now seen corresponding path program 1 times [2023-04-01 09:04:21,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:04:21,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011854514] [2023-04-01 09:04:21,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:04:21,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:04:21,168 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:04:21,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [917866827] [2023-04-01 09:04:21,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:04:21,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:04:21,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:04:21,174 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:04:21,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 09:04:21,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:04:21,252 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 09:04:21,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:04:21,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:04:21,286 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:04:21,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:04:21,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:04:21,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011854514] [2023-04-01 09:04:21,321 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:04:21,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917866827] [2023-04-01 09:04:21,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917866827] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:04:21,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1164395570] [2023-04-01 09:04:21,363 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 09:04:21,363 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:04:21,366 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:04:21,370 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:04:21,371 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:04:21,588 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 87 for LOIs [2023-04-01 09:04:22,970 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 113 for LOIs [2023-04-01 09:04:23,079 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 92 for LOIs [2023-04-01 09:04:23,110 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:04:23,123 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:04:25,395 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '319#(and (exists ((v_main_~b~0.base_BEFORE_CALL_1 Int)) (and (not (= (select (select |#memory_int| v_main_~b~0.base_BEFORE_CALL_1) 0) 1)) (not (= |#StackHeapBarrier| v_main_~b~0.base_BEFORE_CALL_1)) (not (= v_main_~b~0.base_BEFORE_CALL_1 0)))) (exists ((v_main_~a~0.base_BEFORE_CALL_1 Int) (|v_old(#length)_BEFORE_CALL_3| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_3| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_3| (Array Int Int))) (and (not (= (select |v_old(#memory_int)_BEFORE_CALL_3| 2) |v_old(#length)_BEFORE_CALL_3|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 3) 50) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 7) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 6) 99) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 1) 0) 48) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 1) 1) 0) (= (select |v_old(#valid)_BEFORE_CALL_3| 0) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 1) 113) (not (= |v_old(#valid)_BEFORE_CALL_3| |v_old(#length)_BEFORE_CALL_3|)) (not (= v_main_~a~0.base_BEFORE_CALL_1 0)) (not (= v_main_~a~0.base_BEFORE_CALL_1 3)) (= 2 (select |v_old(#length)_BEFORE_CALL_3| 1)) (= (select |v_old(#length)_BEFORE_CALL_3| 3) 12) (not (= |v_old(#length)_BEFORE_CALL_3| (select |v_old(#memory_int)_BEFORE_CALL_3| 1))) (not (= (select |v_old(#memory_int)_BEFORE_CALL_3| 2) |v_old(#valid)_BEFORE_CALL_3|)) (= (select |v_old(#length)_BEFORE_CALL_3| 2) 8) (= (select |v_old(#valid)_BEFORE_CALL_3| v_main_~a~0.base_BEFORE_CALL_1) 0) (not (= v_main_~a~0.base_BEFORE_CALL_1 1)) (not (= v_main_~a~0.base_BEFORE_CALL_1 |#StackHeapBarrier|)) (not (= |v_old(#valid)_BEFORE_CALL_3| (select |v_old(#memory_int)_BEFORE_CALL_3| 1))) (= (select |v_old(#valid)_BEFORE_CALL_3| 2) 1) (= 101 (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 0)) (= (select |v_old(#valid)_BEFORE_CALL_3| 1) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 4) 102) (= (select |v_old(#valid)_BEFORE_CALL_3| 3) 1) (not (= v_main_~a~0.base_BEFORE_CALL_1 2)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 5) 46) (= 110 (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 2)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_3| 2) (select |v_old(#memory_int)_BEFORE_CALL_3| 1))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (<= ~N~0 1) (= |#NULL.offset| 0) (< 0 ~N~0) (= |#NULL.base| 0))' at error location [2023-04-01 09:04:25,396 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:04:25,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:04:25,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2023-04-01 09:04:25,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294261652] [2023-04-01 09:04:25,396 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:04:25,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 09:04:25,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:04:25,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 09:04:25,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2023-04-01 09:04:25,398 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:04:25,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:04:25,508 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2023-04-01 09:04:25,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 09:04:25,509 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2023-04-01 09:04:25,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:04:25,511 INFO L225 Difference]: With dead ends: 51 [2023-04-01 09:04:25,511 INFO L226 Difference]: Without dead ends: 42 [2023-04-01 09:04:25,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2023-04-01 09:04:25,514 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 10 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:04:25,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 71 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:04:25,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-04-01 09:04:25,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 30. [2023-04-01 09:04:25,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 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) [2023-04-01 09:04:25,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2023-04-01 09:04:25,519 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 18 [2023-04-01 09:04:25,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:04:25,520 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2023-04-01 09:04:25,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:04:25,520 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2023-04-01 09:04:25,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 09:04:25,523 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:04:25,523 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:04:25,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 09:04:25,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-04-01 09:04:25,724 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:04:25,724 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:04:25,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1062231974, now seen corresponding path program 1 times [2023-04-01 09:04:25,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:04:25,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668288396] [2023-04-01 09:04:25,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:04:25,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:04:25,747 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:04:25,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1665259508] [2023-04-01 09:04:25,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:04:25,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:04:25,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:04:25,749 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:04:25,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 09:04:25,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:04:25,807 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 09:04:25,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:04:25,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:04:25,830 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 09:04:25,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:04:25,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668288396] [2023-04-01 09:04:25,831 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:04:25,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665259508] [2023-04-01 09:04:25,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665259508] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:04:25,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:04:25,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 09:04:25,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739952726] [2023-04-01 09:04:25,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:04:25,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 09:04:25,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:04:25,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 09:04:25,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 09:04:25,833 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:04:25,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:04:25,867 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2023-04-01 09:04:25,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 09:04:25,868 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2023-04-01 09:04:25,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:04:25,870 INFO L225 Difference]: With dead ends: 43 [2023-04-01 09:04:25,870 INFO L226 Difference]: Without dead ends: 33 [2023-04-01 09:04:25,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:04:25,877 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 09:04:25,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 38 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 09:04:25,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-01 09:04:25,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2023-04-01 09:04:25,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 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) [2023-04-01 09:04:25,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2023-04-01 09:04:25,890 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 18 [2023-04-01 09:04:25,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:04:25,891 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2023-04-01 09:04:25,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:04:25,891 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2023-04-01 09:04:25,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-01 09:04:25,893 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:04:25,893 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:04:25,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 09:04:26,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:04:26,098 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:04:26,099 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:04:26,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1643446050, now seen corresponding path program 1 times [2023-04-01 09:04:26,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:04:26,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5824867] [2023-04-01 09:04:26,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:04:26,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:04:26,138 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:04:26,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [141263670] [2023-04-01 09:04:26,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:04:26,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:04:26,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:04:26,144 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:04:26,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 09:04:26,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:04:26,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 30 conjunts are in the unsatisfiable core [2023-04-01 09:04:26,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:04:26,249 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-04-01 09:04:26,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-04-01 09:04:26,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 09:04:26,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 09:04:26,316 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:04:26,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2023-04-01 09:04:26,324 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 10 treesize of output 8 [2023-04-01 09:04:26,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 09:04:26,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 19 [2023-04-01 09:04:26,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 09:04:26,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:04:26,418 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:04:26,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:04:26,547 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:04:26,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5824867] [2023-04-01 09:04:26,548 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:04:26,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141263670] [2023-04-01 09:04:26,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141263670] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:04:26,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1834403240] [2023-04-01 09:04:26,550 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 09:04:26,550 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:04:26,550 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:04:26,550 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:04:26,550 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:04:26,629 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 87 for LOIs [2023-04-01 09:04:27,781 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 112 for LOIs [2023-04-01 09:04:27,846 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 92 for LOIs [2023-04-01 09:04:27,858 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:04:27,864 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:04:29,556 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '762#(and (= |__VERIFIER_assert_#in~cond| 0) (exists ((v_main_~b~0.base_BEFORE_CALL_2 Int)) (and (not (= v_main_~b~0.base_BEFORE_CALL_2 0)) (not (= |#StackHeapBarrier| v_main_~b~0.base_BEFORE_CALL_2)) (not (= (select (select |#memory_int| v_main_~b~0.base_BEFORE_CALL_2) 0) 1)))) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (exists ((v_main_~a~0.base_BEFORE_CALL_2 Int) (|v_old(#memory_int)_BEFORE_CALL_7| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_7| (Array Int Int)) (|v_old(#length)_BEFORE_CALL_7| (Array Int Int))) (and (not (= v_main_~a~0.base_BEFORE_CALL_2 1)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 7) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 1) 113) (= (select |v_old(#valid)_BEFORE_CALL_7| 1) 1) (= (select |v_old(#valid)_BEFORE_CALL_7| 2) 1) (= (select |v_old(#valid)_BEFORE_CALL_7| 0) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 1) 1) 0) (not (= v_main_~a~0.base_BEFORE_CALL_2 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 1) 0) 48) (= (select |v_old(#valid)_BEFORE_CALL_7| 3) 1) (not (= (select |v_old(#memory_int)_BEFORE_CALL_7| 1) |v_old(#valid)_BEFORE_CALL_7|)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_7| 2) |v_old(#length)_BEFORE_CALL_7|)) (= 102 (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 4)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 3) 50) (= 2 (select |v_old(#length)_BEFORE_CALL_7| 1)) (= 101 (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 6) 99) (= 8 (select |v_old(#length)_BEFORE_CALL_7| 2)) (= 46 (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 5)) (= 110 (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 2)) (not (= v_main_~a~0.base_BEFORE_CALL_2 3)) (= (select |v_old(#valid)_BEFORE_CALL_7| v_main_~a~0.base_BEFORE_CALL_2) 0) (= (select |v_old(#length)_BEFORE_CALL_7| 3) 12) (not (= (select |v_old(#memory_int)_BEFORE_CALL_7| 1) |v_old(#length)_BEFORE_CALL_7|)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_7| 2) |v_old(#valid)_BEFORE_CALL_7|)) (not (= v_main_~a~0.base_BEFORE_CALL_2 |#StackHeapBarrier|)) (not (= |v_old(#valid)_BEFORE_CALL_7| |v_old(#length)_BEFORE_CALL_7|)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_7| 1) (select |v_old(#memory_int)_BEFORE_CALL_7| 2))) (not (= v_main_~a~0.base_BEFORE_CALL_2 2)))) (< 0 ~N~0) (= |#NULL.base| 0))' at error location [2023-04-01 09:04:29,556 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:04:29,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:04:29,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2023-04-01 09:04:29,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079759052] [2023-04-01 09:04:29,557 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:04:29,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 09:04:29,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:04:29,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 09:04:29,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=899, Unknown=4, NotChecked=0, Total=992 [2023-04-01 09:04:29,558 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 17 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 09:04:31,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-01 09:04:32,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:04:32,214 INFO L93 Difference]: Finished difference Result 67 states and 82 transitions. [2023-04-01 09:04:32,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-01 09:04:32,214 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 19 [2023-04-01 09:04:32,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:04:32,215 INFO L225 Difference]: With dead ends: 67 [2023-04-01 09:04:32,215 INFO L226 Difference]: Without dead ends: 65 [2023-04-01 09:04:32,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=190, Invalid=1603, Unknown=13, NotChecked=0, Total=1806 [2023-04-01 09:04:32,217 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 46 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 33 mSolverCounterUnsat, 48 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 48 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-04-01 09:04:32,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 118 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 205 Invalid, 48 Unknown, 0 Unchecked, 2.3s Time] [2023-04-01 09:04:32,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-04-01 09:04:32,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 35. [2023-04-01 09:04:32,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.32) internal successors, (33), 26 states have internal predecessors, (33), 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) [2023-04-01 09:04:32,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2023-04-01 09:04:32,230 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 19 [2023-04-01 09:04:32,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:04:32,230 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2023-04-01 09:04:32,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 09:04:32,231 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2023-04-01 09:04:32,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 09:04:32,231 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:04:32,231 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:04:32,236 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-01 09:04:32,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:04:32,432 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:04:32,432 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:04:32,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1321485858, now seen corresponding path program 2 times [2023-04-01 09:04:32,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:04:32,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106247321] [2023-04-01 09:04:32,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:04:32,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:04:32,450 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:04:32,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [524986680] [2023-04-01 09:04:32,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 09:04:32,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:04:32,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:04:32,461 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:04:32,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 09:04:32,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 09:04:32,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:04:32,531 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 09:04:32,532 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:04:32,568 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 09:04:32,568 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:04:32,605 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 09:04:32,606 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:04:32,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106247321] [2023-04-01 09:04:32,606 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:04:32,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524986680] [2023-04-01 09:04:32,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524986680] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:04:32,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [474688580] [2023-04-01 09:04:32,608 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 09:04:32,608 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:04:32,608 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:04:32,608 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:04:32,608 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:04:32,675 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 87 for LOIs [2023-04-01 09:04:33,744 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 112 for LOIs [2023-04-01 09:04:33,804 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 92 for LOIs [2023-04-01 09:04:33,816 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:04:33,825 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:04:35,387 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1096#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (exists ((|v_old(#memory_int)_BEFORE_CALL_11| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_11| (Array Int Int)) (|v_old(#length)_BEFORE_CALL_11| (Array Int Int)) (v_main_~a~0.base_BEFORE_CALL_3 Int)) (and (= 46 (select (select |v_old(#memory_int)_BEFORE_CALL_11| 2) 5)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_11| 2) |v_old(#valid)_BEFORE_CALL_11|)) (not (= v_main_~a~0.base_BEFORE_CALL_3 1)) (not (= |v_old(#valid)_BEFORE_CALL_11| (select |v_old(#memory_int)_BEFORE_CALL_11| 1))) (not (= v_main_~a~0.base_BEFORE_CALL_3 2)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_11| 2) (select |v_old(#memory_int)_BEFORE_CALL_11| 1))) (= 110 (select (select |v_old(#memory_int)_BEFORE_CALL_11| 2) 2)) (not (= v_main_~a~0.base_BEFORE_CALL_3 3)) (= 1 (select |v_old(#valid)_BEFORE_CALL_11| 2)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_11| 2) 3) 50) (not (= (select |v_old(#memory_int)_BEFORE_CALL_11| 2) |v_old(#length)_BEFORE_CALL_11|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_11| 2) 1) 113) (= (select (select |v_old(#memory_int)_BEFORE_CALL_11| 1) 1) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_11| 2) 6) 99) (= (select |v_old(#valid)_BEFORE_CALL_11| v_main_~a~0.base_BEFORE_CALL_3) 0) (not (= |v_old(#length)_BEFORE_CALL_11| (select |v_old(#memory_int)_BEFORE_CALL_11| 1))) (not (= v_main_~a~0.base_BEFORE_CALL_3 |#StackHeapBarrier|)) (= 101 (select (select |v_old(#memory_int)_BEFORE_CALL_11| 2) 0)) (= 12 (select |v_old(#length)_BEFORE_CALL_11| 3)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_11| 2) 7) 0) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_11| 1) 0)) (= (select |v_old(#valid)_BEFORE_CALL_11| 1) 1) (not (= v_main_~a~0.base_BEFORE_CALL_3 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_11| 2) 4) 102) (= 8 (select |v_old(#length)_BEFORE_CALL_11| 2)) (= (select |v_old(#valid)_BEFORE_CALL_11| 3) 1) (= (select |v_old(#length)_BEFORE_CALL_11| 1) 2) (not (= |v_old(#valid)_BEFORE_CALL_11| |v_old(#length)_BEFORE_CALL_11|)) (= (select |v_old(#valid)_BEFORE_CALL_11| 0) 0))) (= |#NULL.offset| 0) (< 0 ~N~0) (= |#NULL.base| 0) (exists ((v_main_~b~0.base_BEFORE_CALL_3 Int)) (and (not (= |#StackHeapBarrier| v_main_~b~0.base_BEFORE_CALL_3)) (not (= v_main_~b~0.base_BEFORE_CALL_3 0)) (not (= (select (select |#memory_int| v_main_~b~0.base_BEFORE_CALL_3) 0) 1)))))' at error location [2023-04-01 09:04:35,388 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:04:35,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:04:35,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-04-01 09:04:35,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395193349] [2023-04-01 09:04:35,388 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:04:35,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 09:04:35,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:04:35,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 09:04:35,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=485, Unknown=1, NotChecked=0, Total=552 [2023-04-01 09:04:35,390 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:04:35,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:04:35,557 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2023-04-01 09:04:35,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 09:04:35,557 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2023-04-01 09:04:35,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:04:35,558 INFO L225 Difference]: With dead ends: 74 [2023-04-01 09:04:35,558 INFO L226 Difference]: Without dead ends: 59 [2023-04-01 09:04:35,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=95, Invalid=660, Unknown=1, NotChecked=0, Total=756 [2023-04-01 09:04:35,560 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:04:35,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 84 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:04:35,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-04-01 09:04:35,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 38. [2023-04-01 09:04:35,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 29 states have internal predecessors, (36), 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) [2023-04-01 09:04:35,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2023-04-01 09:04:35,567 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 21 [2023-04-01 09:04:35,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:04:35,567 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2023-04-01 09:04:35,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:04:35,568 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2023-04-01 09:04:35,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 09:04:35,568 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:04:35,568 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:04:35,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 09:04:35,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:04:35,777 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:04:35,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:04:35,777 INFO L85 PathProgramCache]: Analyzing trace with hash -230270114, now seen corresponding path program 3 times [2023-04-01 09:04:35,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:04:35,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511868080] [2023-04-01 09:04:35,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:04:35,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:04:35,794 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:04:35,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [637177277] [2023-04-01 09:04:35,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 09:04:35,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:04:35,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:04:35,796 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:04:35,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 09:04:35,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 09:04:35,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:04:35,863 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 09:04:35,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:04:35,903 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:04:35,903 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:04:35,942 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:04:35,942 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:04:35,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511868080] [2023-04-01 09:04:35,943 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:04:35,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637177277] [2023-04-01 09:04:35,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637177277] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:04:35,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1759030803] [2023-04-01 09:04:35,944 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 09:04:35,945 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:04:35,945 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:04:35,945 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:04:35,945 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:04:36,016 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 87 for LOIs [2023-04-01 09:04:36,947 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 112 for LOIs [2023-04-01 09:04:36,988 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 92 for LOIs [2023-04-01 09:04:36,997 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:04:37,002 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:04:38,617 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1431#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_old(#length)_BEFORE_CALL_15| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_15| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_15| (Array Int Int)) (v_main_~a~0.base_BEFORE_CALL_4 Int)) (and (not (= v_main_~a~0.base_BEFORE_CALL_4 1)) (= (select |v_old(#valid)_BEFORE_CALL_15| v_main_~a~0.base_BEFORE_CALL_4) 0) (= (select |v_old(#valid)_BEFORE_CALL_15| 2) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_15| 2) 1) 113) (= (select |v_old(#length)_BEFORE_CALL_15| 3) 12) (= (select |v_old(#valid)_BEFORE_CALL_15| 0) 0) (= 101 (select (select |v_old(#memory_int)_BEFORE_CALL_15| 2) 0)) (not (= |v_old(#valid)_BEFORE_CALL_15| |v_old(#length)_BEFORE_CALL_15|)) (not (= |v_old(#valid)_BEFORE_CALL_15| (select |v_old(#memory_int)_BEFORE_CALL_15| 1))) (= 110 (select (select |v_old(#memory_int)_BEFORE_CALL_15| 2) 2)) (= (select |v_old(#length)_BEFORE_CALL_15| 2) 8) (= (select (select |v_old(#memory_int)_BEFORE_CALL_15| 1) 0) 48) (not (= v_main_~a~0.base_BEFORE_CALL_4 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_15| 2) 7) 0) (not (= (select |v_old(#memory_int)_BEFORE_CALL_15| 2) |v_old(#length)_BEFORE_CALL_15|)) (= (select |v_old(#length)_BEFORE_CALL_15| 1) 2) (= (select |v_old(#valid)_BEFORE_CALL_15| 1) 1) (not (= v_main_~a~0.base_BEFORE_CALL_4 3)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_15| 2) 6) 99) (not (= |v_old(#valid)_BEFORE_CALL_15| (select |v_old(#memory_int)_BEFORE_CALL_15| 2))) (not (= (select |v_old(#memory_int)_BEFORE_CALL_15| 2) (select |v_old(#memory_int)_BEFORE_CALL_15| 1))) (not (= v_main_~a~0.base_BEFORE_CALL_4 2)) (= 102 (select (select |v_old(#memory_int)_BEFORE_CALL_15| 2) 4)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_15| 2) 3) 50) (not (= |v_old(#length)_BEFORE_CALL_15| (select |v_old(#memory_int)_BEFORE_CALL_15| 1))) (= (select |v_old(#valid)_BEFORE_CALL_15| 3) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_15| 2) 5) 46) (= (select (select |v_old(#memory_int)_BEFORE_CALL_15| 1) 1) 0) (not (= v_main_~a~0.base_BEFORE_CALL_4 |#StackHeapBarrier|)))) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (exists ((v_main_~b~0.base_BEFORE_CALL_4 Int)) (and (not (= v_main_~b~0.base_BEFORE_CALL_4 0)) (not (= (select (select |#memory_int| v_main_~b~0.base_BEFORE_CALL_4) 0) 1)) (not (= |#StackHeapBarrier| v_main_~b~0.base_BEFORE_CALL_4)))) (< 0 ~N~0) (= |#NULL.base| 0))' at error location [2023-04-01 09:04:38,617 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:04:38,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:04:38,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-04-01 09:04:38,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094568556] [2023-04-01 09:04:38,618 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:04:38,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 09:04:38,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:04:38,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 09:04:38,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2023-04-01 09:04:38,619 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:04:38,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:04:38,835 INFO L93 Difference]: Finished difference Result 76 states and 92 transitions. [2023-04-01 09:04:38,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 09:04:38,836 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2023-04-01 09:04:38,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:04:38,836 INFO L225 Difference]: With dead ends: 76 [2023-04-01 09:04:38,836 INFO L226 Difference]: Without dead ends: 52 [2023-04-01 09:04:38,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=158, Invalid=964, Unknown=0, NotChecked=0, Total=1122 [2023-04-01 09:04:38,838 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 15 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:04:38,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 58 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:04:38,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-04-01 09:04:38,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2023-04-01 09:04:38,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 09:04:38,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2023-04-01 09:04:38,846 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 21 [2023-04-01 09:04:38,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:04:38,846 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2023-04-01 09:04:38,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:04:38,847 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2023-04-01 09:04:38,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 09:04:38,848 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:04:38,848 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:04:38,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 09:04:39,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:04:39,054 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:04:39,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:04:39,054 INFO L85 PathProgramCache]: Analyzing trace with hash 2073248434, now seen corresponding path program 4 times [2023-04-01 09:04:39,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:04:39,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150861751] [2023-04-01 09:04:39,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:04:39,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:04:39,071 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:04:39,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [988125989] [2023-04-01 09:04:39,071 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 09:04:39,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:04:39,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:04:39,072 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:04:39,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 09:04:39,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:04:39,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 09:04:39,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:04:39,172 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:04:39,173 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:04:39,213 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:04:39,214 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:04:39,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150861751] [2023-04-01 09:04:39,214 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:04:39,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988125989] [2023-04-01 09:04:39,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988125989] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:04:39,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1038501598] [2023-04-01 09:04:39,215 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 09:04:39,215 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:04:39,216 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:04:39,216 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:04:39,216 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:04:39,260 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 87 for LOIs [2023-04-01 09:04:40,142 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 112 for LOIs [2023-04-01 09:04:40,201 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 92 for LOIs [2023-04-01 09:04:40,212 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:04:40,218 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:04:41,735 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1797#(and (exists ((v_main_~b~0.base_BEFORE_CALL_5 Int)) (and (not (= (select (select |#memory_int| v_main_~b~0.base_BEFORE_CALL_5) 0) 1)) (not (= |#StackHeapBarrier| v_main_~b~0.base_BEFORE_CALL_5)) (not (= v_main_~b~0.base_BEFORE_CALL_5 0)))) (exists ((|v_old(#length)_BEFORE_CALL_19| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_19| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_19| (Array Int Int)) (v_main_~a~0.base_BEFORE_CALL_5 Int)) (and (= (select (select |v_old(#memory_int)_BEFORE_CALL_19| 1) 0) 48) (not (= v_main_~a~0.base_BEFORE_CALL_5 0)) (= 12 (select |v_old(#length)_BEFORE_CALL_19| 3)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_19| 1) (select |v_old(#memory_int)_BEFORE_CALL_19| 2))) (not (= v_main_~a~0.base_BEFORE_CALL_5 1)) (= 110 (select (select |v_old(#memory_int)_BEFORE_CALL_19| 2) 2)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_19| 1) |v_old(#valid)_BEFORE_CALL_19|)) (= 102 (select (select |v_old(#memory_int)_BEFORE_CALL_19| 2) 4)) (= (select |v_old(#valid)_BEFORE_CALL_19| v_main_~a~0.base_BEFORE_CALL_5) 0) (not (= (select |v_old(#memory_int)_BEFORE_CALL_19| 1) |v_old(#length)_BEFORE_CALL_19|)) (= (select |v_old(#valid)_BEFORE_CALL_19| 0) 0) (not (= v_main_~a~0.base_BEFORE_CALL_5 2)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_19| 2) 3) 50) (not (= |v_old(#length)_BEFORE_CALL_19| (select |v_old(#memory_int)_BEFORE_CALL_19| 2))) (= (select |v_old(#valid)_BEFORE_CALL_19| 3) 1) (= (select |v_old(#length)_BEFORE_CALL_19| 1) 2) (= 101 (select (select |v_old(#memory_int)_BEFORE_CALL_19| 2) 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_19| 2) 1) 113) (= (select (select |v_old(#memory_int)_BEFORE_CALL_19| 2) 6) 99) (= (select |v_old(#length)_BEFORE_CALL_19| 2) 8) (not (= v_main_~a~0.base_BEFORE_CALL_5 |#StackHeapBarrier|)) (= (select |v_old(#valid)_BEFORE_CALL_19| 2) 1) (not (= v_main_~a~0.base_BEFORE_CALL_5 3)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_19| 2) 7) 0) (not (= |v_old(#valid)_BEFORE_CALL_19| (select |v_old(#memory_int)_BEFORE_CALL_19| 2))) (= 1 (select |v_old(#valid)_BEFORE_CALL_19| 1)) (not (= |v_old(#valid)_BEFORE_CALL_19| |v_old(#length)_BEFORE_CALL_19|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_19| 2) 5) 46) (= (select (select |v_old(#memory_int)_BEFORE_CALL_19| 1) 1) 0))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (< 0 ~N~0) (= |#NULL.base| 0))' at error location [2023-04-01 09:04:41,735 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:04:41,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:04:41,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-04-01 09:04:41,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140632554] [2023-04-01 09:04:41,736 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:04:41,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 09:04:41,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:04:41,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 09:04:41,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2023-04-01 09:04:41,737 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:04:41,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:04:41,900 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2023-04-01 09:04:41,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 09:04:41,901 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2023-04-01 09:04:41,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:04:41,901 INFO L225 Difference]: With dead ends: 70 [2023-04-01 09:04:41,901 INFO L226 Difference]: Without dead ends: 61 [2023-04-01 09:04:41,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2023-04-01 09:04:41,902 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 18 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:04:41,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 84 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:04:41,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-04-01 09:04:41,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 43. [2023-04-01 09:04:41,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 33 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 09:04:41,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2023-04-01 09:04:41,911 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 22 [2023-04-01 09:04:41,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:04:41,911 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2023-04-01 09:04:41,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:04:41,911 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2023-04-01 09:04:41,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 09:04:41,912 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:04:41,912 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:04:41,920 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-04-01 09:04:42,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:04:42,118 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:04:42,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:04:42,118 INFO L85 PathProgramCache]: Analyzing trace with hash -64170914, now seen corresponding path program 5 times [2023-04-01 09:04:42,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:04:42,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715069276] [2023-04-01 09:04:42,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:04:42,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:04:42,138 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:04:42,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1681241677] [2023-04-01 09:04:42,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 09:04:42,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:04:42,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:04:42,145 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:04:42,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 09:04:42,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 09:04:42,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:04:42,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 43 conjunts are in the unsatisfiable core [2023-04-01 09:04:42,251 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:04:42,302 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-04-01 09:04:42,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-04-01 09:04:42,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 09:04:42,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 09:04:42,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 38 treesize of output 11 [2023-04-01 09:04:42,373 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 10 treesize of output 8 [2023-04-01 09:04:42,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-04-01 09:04:42,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-04-01 09:04:42,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-04-01 09:04:42,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 09:04:42,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 09:04:42,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-04-01 09:04:42,530 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-04-01 09:04:42,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 24 [2023-04-01 09:04:42,630 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 09:04:42,630 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:04:58,946 WARN L839 $PredicateComparison]: unable to prove that (forall ((main_~i~0 Int) (v_ArrVal_294 Int) (v_ArrVal_289 (Array Int Int))) (or (< (+ main_~i~0 1) c_~N~0) (= (select (store (select (store |c_#memory_int| c_main_~a~0.base v_ArrVal_289) c_main_~b~0.base) (+ (* main_~i~0 8) c_main_~b~0.offset) v_ArrVal_294) c_main_~b~0.offset) 1))) is different from false [2023-04-01 09:04:59,502 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:04:59,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-04-01 09:04:59,508 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:04:59,527 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2023-04-01 09:04:59,528 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:04:59,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715069276] [2023-04-01 09:04:59,528 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:04:59,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681241677] [2023-04-01 09:04:59,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681241677] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:04:59,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1232760587] [2023-04-01 09:04:59,530 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 09:04:59,530 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:04:59,530 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:04:59,530 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:04:59,530 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:04:59,597 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 87 for LOIs [2023-04-01 09:05:00,561 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 112 for LOIs [2023-04-01 09:05:00,618 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 92 for LOIs [2023-04-01 09:05:00,629 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:05:00,636 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:05:02,391 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2164#(and (exists ((|v_old(#memory_int)_BEFORE_CALL_23| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_23| (Array Int Int)) (|v_old(#length)_BEFORE_CALL_23| (Array Int Int)) (v_main_~a~0.base_BEFORE_CALL_6 Int)) (and (= (select (select |v_old(#memory_int)_BEFORE_CALL_23| 1) 0) 48) (not (= v_main_~a~0.base_BEFORE_CALL_6 |#StackHeapBarrier|)) (= 12 (select |v_old(#length)_BEFORE_CALL_23| 3)) (= (select |v_old(#valid)_BEFORE_CALL_23| 2) 1) (= (select |v_old(#valid)_BEFORE_CALL_23| 0) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_23| 1) 1) 0) (= 8 (select |v_old(#length)_BEFORE_CALL_23| 2)) (not (= v_main_~a~0.base_BEFORE_CALL_6 2)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_23| 2) 4) 102) (= (select (select |v_old(#memory_int)_BEFORE_CALL_23| 2) 3) 50) (not (= (select |v_old(#memory_int)_BEFORE_CALL_23| 1) |v_old(#length)_BEFORE_CALL_23|)) (not (= |v_old(#valid)_BEFORE_CALL_23| (select |v_old(#memory_int)_BEFORE_CALL_23| 1))) (not (= |v_old(#valid)_BEFORE_CALL_23| |v_old(#length)_BEFORE_CALL_23|)) (= 110 (select (select |v_old(#memory_int)_BEFORE_CALL_23| 2) 2)) (not (= |v_old(#valid)_BEFORE_CALL_23| (select |v_old(#memory_int)_BEFORE_CALL_23| 2))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_23| 2) 6) 99) (not (= (select |v_old(#memory_int)_BEFORE_CALL_23| 2) |v_old(#length)_BEFORE_CALL_23|)) (not (= v_main_~a~0.base_BEFORE_CALL_6 0)) (= 101 (select (select |v_old(#memory_int)_BEFORE_CALL_23| 2) 0)) (not (= v_main_~a~0.base_BEFORE_CALL_6 1)) (= (select |v_old(#valid)_BEFORE_CALL_23| 1) 1) (= (select |v_old(#valid)_BEFORE_CALL_23| 3) 1) (= (select |v_old(#valid)_BEFORE_CALL_23| v_main_~a~0.base_BEFORE_CALL_6) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_23| 2) 5) 46) (not (= v_main_~a~0.base_BEFORE_CALL_6 3)) (= 113 (select (select |v_old(#memory_int)_BEFORE_CALL_23| 2) 1)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_23| 2) (select |v_old(#memory_int)_BEFORE_CALL_23| 1))) (= 0 (select (select |v_old(#memory_int)_BEFORE_CALL_23| 2) 7)) (= (select |v_old(#length)_BEFORE_CALL_23| 1) 2))) (exists ((v_main_~b~0.base_BEFORE_CALL_6 Int)) (and (not (= (select (select |#memory_int| v_main_~b~0.base_BEFORE_CALL_6) 0) 1)) (not (= |#StackHeapBarrier| v_main_~b~0.base_BEFORE_CALL_6)) (not (= v_main_~b~0.base_BEFORE_CALL_6 0)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (< 0 ~N~0) (= |#NULL.base| 0))' at error location [2023-04-01 09:05:02,391 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:05:02,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:05:02,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2023-04-01 09:05:02,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981617678] [2023-04-01 09:05:02,392 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:05:02,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-04-01 09:05:02,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:05:02,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-04-01 09:05:02,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1270, Unknown=9, NotChecked=72, Total=1482 [2023-04-01 09:05:02,394 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 24 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 09:05:12,486 WARN L223 SmtUtils]: Spent 10.01s on a formula simplification. DAG size of input: 37 DAG size of output: 35 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 09:05:12,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:05:12,867 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2023-04-01 09:05:12,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 09:05:12,867 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2023-04-01 09:05:12,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:05:12,868 INFO L225 Difference]: With dead ends: 55 [2023-04-01 09:05:12,868 INFO L226 Difference]: Without dead ends: 53 [2023-04-01 09:05:12,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 28.9s TimeCoverageRelationStatistics Valid=215, Invalid=1850, Unknown=9, NotChecked=88, Total=2162 [2023-04-01 09:05:12,869 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 29 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 09:05:12,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 116 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 308 Invalid, 0 Unknown, 32 Unchecked, 0.2s Time] [2023-04-01 09:05:12,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-04-01 09:05:12,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2023-04-01 09:05:12,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 38 states have internal predecessors, (40), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 09:05:12,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2023-04-01 09:05:12,880 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 23 [2023-04-01 09:05:12,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:05:12,881 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2023-04-01 09:05:12,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 09:05:12,881 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2023-04-01 09:05:12,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-01 09:05:12,882 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:05:12,882 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] [2023-04-01 09:05:12,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 09:05:13,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-04-01 09:05:13,090 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:05:13,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:05:13,091 INFO L85 PathProgramCache]: Analyzing trace with hash -409251036, now seen corresponding path program 1 times [2023-04-01 09:05:13,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:05:13,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729814000] [2023-04-01 09:05:13,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:05:13,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:05:13,106 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:05:13,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1007442807] [2023-04-01 09:05:13,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:05:13,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:05:13,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:05:13,107 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:05:13,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 09:05:13,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-01 09:05:13,174 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-04-01 09:05:13,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-01 09:05:13,208 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-04-01 09:05:13,208 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-04-01 09:05:13,209 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-01 09:05:13,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 09:05:13,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:05:13,414 INFO L445 BasicCegarLoop]: Path program histogram: [5, 1, 1, 1, 1] [2023-04-01 09:05:13,416 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-01 09:05:13,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.04 09:05:13 BoogieIcfgContainer [2023-04-01 09:05:13,435 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-01 09:05:13,436 INFO L158 Benchmark]: Toolchain (without parser) took 54185.55ms. Allocated memory was 269.5MB in the beginning and 488.6MB in the end (delta: 219.2MB). Free memory was 211.9MB in the beginning and 262.5MB in the end (delta: -50.5MB). Peak memory consumption was 170.1MB. Max. memory is 8.0GB. [2023-04-01 09:05:13,436 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 182.5MB. Free memory is still 130.9MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-01 09:05:13,436 INFO L158 Benchmark]: CACSL2BoogieTranslator took 194.79ms. Allocated memory is still 269.5MB. Free memory was 211.9MB in the beginning and 201.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-04-01 09:05:13,436 INFO L158 Benchmark]: Boogie Preprocessor took 37.34ms. Allocated memory is still 269.5MB. Free memory was 201.4MB in the beginning and 199.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-04-01 09:05:13,437 INFO L158 Benchmark]: RCFGBuilder took 352.29ms. Allocated memory is still 269.5MB. Free memory was 199.3MB in the beginning and 184.6MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2023-04-01 09:05:13,437 INFO L158 Benchmark]: TraceAbstraction took 53596.00ms. Allocated memory was 269.5MB in the beginning and 488.6MB in the end (delta: 219.2MB). Free memory was 184.1MB in the beginning and 262.5MB in the end (delta: -78.4MB). Peak memory consumption was 141.8MB. Max. memory is 8.0GB. [2023-04-01 09:05:13,438 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 182.5MB. Free memory is still 130.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 194.79ms. Allocated memory is still 269.5MB. Free memory was 211.9MB in the beginning and 201.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 37.34ms. Allocated memory is still 269.5MB. Free memory was 201.4MB in the beginning and 199.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 352.29ms. Allocated memory is still 269.5MB. Free memory was 199.3MB in the beginning and 184.6MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * TraceAbstraction took 53596.00ms. Allocated memory was 269.5MB in the beginning and 488.6MB in the end (delta: 219.2MB). Free memory was 184.1MB in the beginning and 262.5MB in the end (delta: -78.4MB). Peak memory consumption was 141.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) VAL [N=2, \old(N)=0] [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [N=2, \old(N)=0, \old(cond)=1] [L13] COND FALSE !(!cond) [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [N=2, \old(N)=0] [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] a[0] = 8 [L32] b[0] = 1 [L34] i=1 VAL [N=2, \old(N)=0, a={-2:0}, b={-1:0}, i=1] [L34] COND TRUE i