/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/s12if.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 09:07:21,710 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 09:07:21,713 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 09:07:21,754 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 09:07:21,755 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 09:07:21,757 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 09:07:21,760 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 09:07:21,762 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 09:07:21,764 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 09:07:21,768 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 09:07:21,770 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 09:07:21,771 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 09:07:21,772 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 09:07:21,774 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 09:07:21,774 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 09:07:21,776 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 09:07:21,776 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 09:07:21,777 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 09:07:21,780 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 09:07:21,784 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 09:07:21,785 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 09:07:21,786 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 09:07:21,787 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 09:07:21,789 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 09:07:21,796 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 09:07:21,797 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 09:07:21,797 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 09:07:21,798 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 09:07:21,799 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 09:07:21,799 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 09:07:21,799 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 09:07:21,800 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 09:07:21,801 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 09:07:21,802 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 09:07:21,802 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 09:07:21,802 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 09:07:21,803 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 09:07:21,803 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 09:07:21,803 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 09:07:21,804 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 09:07:21,804 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 09:07:21,806 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 09:07:21,834 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 09:07:21,834 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 09:07:21,834 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 09:07:21,835 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 09:07:21,835 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 09:07:21,835 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 09:07:21,836 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 09:07:21,836 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 09:07:21,836 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 09:07:21,836 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 09:07:21,837 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 09:07:21,837 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 09:07:21,837 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 09:07:21,837 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 09:07:21,837 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 09:07:21,838 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 09:07:21,838 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 09:07:21,838 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 09:07:21,839 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 09:07:21,839 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 09:07:21,839 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 09:07:21,839 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 09:07:21,839 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 09:07:21,839 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 09:07:21,839 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 09:07:21,840 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 09:07:21,840 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 09:07:21,840 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 09:07:21,840 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 09:07:21,840 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 09:07:21,840 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 09:07:21,841 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 09:07:21,841 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:07:21,841 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 09:07:21,841 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 09:07:21,841 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 09:07:21,842 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 09:07:21,842 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 09:07:21,842 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 09:07:21,842 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 09:07:21,842 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 09:07:21,842 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 09:07:22,087 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 09:07:22,113 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 09:07:22,115 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 09:07:22,117 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 09:07:22,117 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 09:07:22,118 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/s12if.c [2023-04-01 09:07:23,245 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 09:07:23,425 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 09:07:23,426 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s12if.c [2023-04-01 09:07:23,430 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5606bbe3c/6c147a9a74eb4ada89d80a090262a18d/FLAG24cc8d0c9 [2023-04-01 09:07:23,442 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5606bbe3c/6c147a9a74eb4ada89d80a090262a18d [2023-04-01 09:07:23,444 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 09:07:23,445 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 09:07:23,446 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 09:07:23,446 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 09:07:23,450 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 09:07:23,451 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:07:23" (1/1) ... [2023-04-01 09:07:23,452 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a4def6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:07:23, skipping insertion in model container [2023-04-01 09:07:23,453 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:07:23" (1/1) ... [2023-04-01 09:07:23,459 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 09:07:23,474 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 09:07:23,623 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/s12if.c[588,601] [2023-04-01 09:07:23,652 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:07:23,668 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 09:07:23,677 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/s12if.c[588,601] [2023-04-01 09:07:23,690 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:07:23,702 INFO L208 MainTranslator]: Completed translation [2023-04-01 09:07:23,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:07:23 WrapperNode [2023-04-01 09:07:23,703 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 09:07:23,704 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 09:07:23,704 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 09:07:23,704 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 09:07:23,716 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:07:23" (1/1) ... [2023-04-01 09:07:23,716 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:07:23" (1/1) ... [2023-04-01 09:07:23,727 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:07:23" (1/1) ... [2023-04-01 09:07:23,727 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:07:23" (1/1) ... [2023-04-01 09:07:23,736 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:07:23" (1/1) ... [2023-04-01 09:07:23,741 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:07:23" (1/1) ... [2023-04-01 09:07:23,742 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:07:23" (1/1) ... [2023-04-01 09:07:23,743 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:07:23" (1/1) ... [2023-04-01 09:07:23,745 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 09:07:23,749 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 09:07:23,749 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 09:07:23,749 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 09:07:23,750 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:07:23" (1/1) ... [2023-04-01 09:07:23,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:07:23,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:07:23,781 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 09:07:23,783 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 09:07:23,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 09:07:23,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 09:07:23,811 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 09:07:23,811 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 09:07:23,811 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 09:07:23,811 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 09:07:23,811 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 09:07:23,811 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 09:07:23,812 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 09:07:23,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 09:07:23,812 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 09:07:23,812 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 09:07:23,812 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 09:07:23,812 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 09:07:23,812 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 09:07:23,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 09:07:23,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 09:07:23,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 09:07:23,813 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 09:07:23,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 09:07:23,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 09:07:23,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 09:07:23,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 09:07:23,880 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 09:07:23,887 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 09:07:24,146 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 09:07:24,206 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 09:07:24,206 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 09:07:24,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:07:24 BoogieIcfgContainer [2023-04-01 09:07:24,208 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 09:07:24,210 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 09:07:24,210 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 09:07:24,213 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 09:07:24,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 09:07:23" (1/3) ... [2023-04-01 09:07:24,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39b2674 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:07:24, skipping insertion in model container [2023-04-01 09:07:24,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:07:23" (2/3) ... [2023-04-01 09:07:24,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39b2674 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:07:24, skipping insertion in model container [2023-04-01 09:07:24,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:07:24" (3/3) ... [2023-04-01 09:07:24,215 INFO L112 eAbstractionObserver]: Analyzing ICFG s12if.c [2023-04-01 09:07:24,230 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 09:07:24,231 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 09:07:24,269 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 09:07:24,277 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;@2bd4810, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 09:07:24,277 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 09:07:24,281 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 09:07:24,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-01 09:07:24,288 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:07:24,289 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 09:07:24,290 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:07:24,296 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:07:24,297 INFO L85 PathProgramCache]: Analyzing trace with hash 27340442, now seen corresponding path program 1 times [2023-04-01 09:07:24,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:07:24,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853887398] [2023-04-01 09:07:24,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:07:24,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:07:24,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:07:24,627 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 09:07:24,628 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:07:24,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853887398] [2023-04-01 09:07:24,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853887398] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:07:24,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:07:24,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 09:07:24,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82363079] [2023-04-01 09:07:24,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:07:24,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 09:07:24,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:07:24,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 09:07:24,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 09:07:24,675 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 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:07:24,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:07:24,775 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2023-04-01 09:07:24,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 09:07:24,777 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2023-04-01 09:07:24,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:07:24,784 INFO L225 Difference]: With dead ends: 46 [2023-04-01 09:07:24,784 INFO L226 Difference]: Without dead ends: 21 [2023-04-01 09:07:24,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 09:07:24,793 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 22 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:07:24,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 36 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:07:24,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-01 09:07:24,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-04-01 09:07:24,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:07:24,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2023-04-01 09:07:24,823 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2023-04-01 09:07:24,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:07:24,823 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2023-04-01 09:07:24,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:07:24,823 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2023-04-01 09:07:24,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 09:07:24,824 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:07:24,824 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:07:24,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 09:07:24,825 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:07:24,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:07:24,825 INFO L85 PathProgramCache]: Analyzing trace with hash 933496895, now seen corresponding path program 1 times [2023-04-01 09:07:24,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:07:24,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951666363] [2023-04-01 09:07:24,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:07:24,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:07:24,856 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:07:24,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [809670200] [2023-04-01 09:07:24,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:07:24,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:07:24,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:07:24,859 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 09:07:24,861 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 09:07:24,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:07:24,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 44 conjunts are in the unsatisfiable core [2023-04-01 09:07:24,979 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:07:25,079 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 09:07:25,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 09:07:25,132 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 09:07:25,236 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 26 treesize of output 21 [2023-04-01 09:07:25,337 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 26 treesize of output 21 [2023-04-01 09:07:25,471 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:07:25,471 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:07:25,611 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 7 treesize of output 5 [2023-04-01 09:07:25,709 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 5 treesize of output 3 [2023-04-01 09:07:25,831 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:07:25,943 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:07:25,943 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:07:25,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951666363] [2023-04-01 09:07:25,944 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:07:25,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809670200] [2023-04-01 09:07:25,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809670200] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:07:25,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1357072624] [2023-04-01 09:07:25,981 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 09:07:25,982 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:07:25,985 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:07:25,989 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:07:25,990 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:07:26,209 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 87 for LOIs [2023-04-01 09:07:29,395 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 107 for LOIs [2023-04-01 09:07:29,462 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 92 for LOIs [2023-04-01 09:07:29,475 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:07:29,483 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:07:31,499 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '273#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= ~N~0 0)) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (exists ((|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)) (|v_main_~#sum~0.base_BEFORE_CALL_1| Int)) (and (not (= (* 2 ~N~0) (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_1|) 0))) (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) 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) (not (= |v_old(#valid)_BEFORE_CALL_3| |v_old(#length)_BEFORE_CALL_3|)) (= (select |v_old(#valid)_BEFORE_CALL_3| |v_main_~#sum~0.base_BEFORE_CALL_1|) 0) (= 2 (select |v_old(#length)_BEFORE_CALL_3| 1)) (= (select |v_old(#length)_BEFORE_CALL_3| 3) 12) (not (= 2 |v_main_~#sum~0.base_BEFORE_CALL_1|)) (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 (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 3) 105) (not (= 3 |v_main_~#sum~0.base_BEFORE_CALL_1|)) (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) (= 49 (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 1)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 2) 50) (= (select |v_old(#valid)_BEFORE_CALL_3| 1) 1) (not (= |v_main_~#sum~0.base_BEFORE_CALL_1| |#StackHeapBarrier|)) (= 115 (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 0)) (not (= |v_main_~#sum~0.base_BEFORE_CALL_1| 1)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 4) 102) (not (= |v_main_~#sum~0.base_BEFORE_CALL_1| 0)) (= (select |v_old(#valid)_BEFORE_CALL_3| 3) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 5) 46) (not (= (select |v_old(#memory_int)_BEFORE_CALL_3| 2) (select |v_old(#memory_int)_BEFORE_CALL_3| 1))))) (= |#NULL.base| 0))' at error location [2023-04-01 09:07:31,500 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:07:31,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:07:31,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2023-04-01 09:07:31,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128366401] [2023-04-01 09:07:31,501 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:07:31,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 09:07:31,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:07:31,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 09:07:31,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1328, Unknown=0, NotChecked=0, Total=1482 [2023-04-01 09:07:31,504 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 25 states, 20 states have (on average 1.25) internal successors, (25), 22 states have internal predecessors, (25), 5 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 09:07:32,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:07:32,024 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2023-04-01 09:07:32,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-01 09:07:32,025 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 20 states have (on average 1.25) internal successors, (25), 22 states have internal predecessors, (25), 5 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 20 [2023-04-01 09:07:32,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:07:32,027 INFO L225 Difference]: With dead ends: 35 [2023-04-01 09:07:32,027 INFO L226 Difference]: Without dead ends: 30 [2023-04-01 09:07:32,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=218, Invalid=1762, Unknown=0, NotChecked=0, Total=1980 [2023-04-01 09:07:32,029 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 35 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 09:07:32,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 74 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 09:07:32,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-04-01 09:07:32,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2023-04-01 09:07:32,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:07:32,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-04-01 09:07:32,038 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 20 [2023-04-01 09:07:32,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:07:32,038 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-04-01 09:07:32,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 20 states have (on average 1.25) internal successors, (25), 22 states have internal predecessors, (25), 5 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 09:07:32,038 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-04-01 09:07:32,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 09:07:32,039 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:07:32,039 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:07:32,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 09:07:32,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:07:32,248 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:07:32,248 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:07:32,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1878810709, now seen corresponding path program 2 times [2023-04-01 09:07:32,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:07:32,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526153914] [2023-04-01 09:07:32,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:07:32,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:07:32,267 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:07:32,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [318456959] [2023-04-01 09:07:32,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 09:07:32,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:07:32,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:07:32,279 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 09:07:32,299 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 09:07:32,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 09:07:32,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:07:32,346 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 09:07:32,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:07:32,406 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 09:07:32,406 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:07:32,444 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 09:07:32,445 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:07:32,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526153914] [2023-04-01 09:07:32,445 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:07:32,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318456959] [2023-04-01 09:07:32,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318456959] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:07:32,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1883980181] [2023-04-01 09:07:32,447 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 09:07:32,447 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:07:32,447 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:07:32,447 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:07:32,447 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:07:32,567 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 87 for LOIs [2023-04-01 09:07:34,740 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 107 for LOIs [2023-04-01 09:07:34,807 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 92 for LOIs [2023-04-01 09:07:34,819 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:07:34,826 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:07:36,325 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '534#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= ~N~0 0)) (not (= |#StackHeapBarrier| 0)) (exists ((|v_old(#memory_int)_BEFORE_CALL_7| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_7| (Array Int Int)) (|v_main_~#sum~0.base_BEFORE_CALL_2| Int) (|v_old(#length)_BEFORE_CALL_7| (Array Int Int))) (and (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 7) 0) (= (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) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 1) 0) 48) (not (= |v_main_~#sum~0.base_BEFORE_CALL_2| 0)) (= (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) 105) (not (= 3 |v_main_~#sum~0.base_BEFORE_CALL_2|)) (= 2 (select |v_old(#length)_BEFORE_CALL_7| 1)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 0) 115) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 6) 99) (not (= |v_main_~#sum~0.base_BEFORE_CALL_2| 1)) (not (= |v_main_~#sum~0.base_BEFORE_CALL_2| |#StackHeapBarrier|)) (= 0 (select |v_old(#valid)_BEFORE_CALL_7| |v_main_~#sum~0.base_BEFORE_CALL_2|)) (= 8 (select |v_old(#length)_BEFORE_CALL_7| 2)) (= 46 (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 5)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 2) 50) (= 49 (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 1)) (not (= (* 2 ~N~0) (select (select |#memory_int| |v_main_~#sum~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 (= 2 |v_main_~#sum~0.base_BEFORE_CALL_2|)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_7| 2) |v_old(#valid)_BEFORE_CALL_7|)) (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))))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 09:07:36,325 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:07:36,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:07:36,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-04-01 09:07:36,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204406655] [2023-04-01 09:07:36,326 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:07:36,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 09:07:36,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:07:36,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 09:07:36,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2023-04-01 09:07:36,328 INFO L87 Difference]: Start difference. First operand 25 states and 29 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 09:07:36,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:07:36,455 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2023-04-01 09:07:36,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 09:07:36,456 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 09:07:36,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:07:36,457 INFO L225 Difference]: With dead ends: 35 [2023-04-01 09:07:36,457 INFO L226 Difference]: Without dead ends: 28 [2023-04-01 09:07:36,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2023-04-01 09:07:36,459 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:07:36,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 58 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:07:36,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-01 09:07:36,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2023-04-01 09:07:36,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:07:36,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2023-04-01 09:07:36,470 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 21 [2023-04-01 09:07:36,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:07:36,471 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2023-04-01 09:07:36,471 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 09:07:36,471 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2023-04-01 09:07:36,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 09:07:36,472 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:07:36,472 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:07:36,479 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 09:07:36,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-01 09:07:36,678 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:07:36,678 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:07:36,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1166617831, now seen corresponding path program 3 times [2023-04-01 09:07:36,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:07:36,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839608882] [2023-04-01 09:07:36,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:07:36,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:07:36,694 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:07:36,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [86398991] [2023-04-01 09:07:36,694 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 09:07:36,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:07:36,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:07:36,696 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 09:07:36,722 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 09:07:36,771 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 09:07:36,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:07:36,772 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 09:07:36,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:07:36,801 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 09:07:36,802 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:07:36,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 09:07:36,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:07:36,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839608882] [2023-04-01 09:07:36,832 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:07:36,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86398991] [2023-04-01 09:07:36,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86398991] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:07:36,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1747441148] [2023-04-01 09:07:36,833 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 09:07:36,834 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:07:36,834 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:07:36,834 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:07:36,834 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:07:36,907 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 87 for LOIs [2023-04-01 09:07:38,949 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 107 for LOIs [2023-04-01 09:07:39,009 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 92 for LOIs [2023-04-01 09:07:39,021 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:07:39,027 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:07:40,437 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '786#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= ~N~0 0)) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (exists ((|v_old(#memory_int)_BEFORE_CALL_11| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_11| (Array Int Int)) (|v_main_~#sum~0.base_BEFORE_CALL_3| Int) (|v_old(#length)_BEFORE_CALL_11| (Array Int Int))) (and (not (= (* 2 ~N~0) (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_3|) 0))) (= 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_old(#valid)_BEFORE_CALL_11| (select |v_old(#memory_int)_BEFORE_CALL_11| 1))) (not (= (select |v_old(#memory_int)_BEFORE_CALL_11| 2) (select |v_old(#memory_int)_BEFORE_CALL_11| 1))) (= 1 (select |v_old(#valid)_BEFORE_CALL_11| 2)) (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) 3) 105) (= (select (select |v_old(#memory_int)_BEFORE_CALL_11| 1) 1) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_11| 2) 6) 99) (not (= |v_old(#length)_BEFORE_CALL_11| (select |v_old(#memory_int)_BEFORE_CALL_11| 1))) (= (select |v_old(#valid)_BEFORE_CALL_11| |v_main_~#sum~0.base_BEFORE_CALL_3|) 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)) (not (= 2 |v_main_~#sum~0.base_BEFORE_CALL_3|)) (= 115 (select (select |v_old(#memory_int)_BEFORE_CALL_11| 2) 0)) (= (select |v_old(#valid)_BEFORE_CALL_11| 1) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_11| 2) 4) 102) (not (= |v_main_~#sum~0.base_BEFORE_CALL_3| 1)) (= 8 (select |v_old(#length)_BEFORE_CALL_11| 2)) (not (= |v_main_~#sum~0.base_BEFORE_CALL_3| 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_11| 2) 1) 49) (= (select |v_old(#valid)_BEFORE_CALL_11| 3) 1) (not (= 3 |v_main_~#sum~0.base_BEFORE_CALL_3|)) (= (select |v_old(#length)_BEFORE_CALL_11| 1) 2) (not (= |v_old(#valid)_BEFORE_CALL_11| |v_old(#length)_BEFORE_CALL_11|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_11| 2) 2) 50) (= (select |v_old(#valid)_BEFORE_CALL_11| 0) 0) (not (= |v_main_~#sum~0.base_BEFORE_CALL_3| |#StackHeapBarrier|)))) (= |#NULL.base| 0))' at error location [2023-04-01 09:07:40,437 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:07:40,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:07:40,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-04-01 09:07:40,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917347834] [2023-04-01 09:07:40,437 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:07:40,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 09:07:40,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:07:40,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 09:07:40,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2023-04-01 09:07:40,439 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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 09:07:40,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:07:40,517 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2023-04-01 09:07:40,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 09:07:40,517 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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 09:07:40,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:07:40,518 INFO L225 Difference]: With dead ends: 37 [2023-04-01 09:07:40,518 INFO L226 Difference]: Without dead ends: 24 [2023-04-01 09:07:40,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2023-04-01 09:07:40,519 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 09:07:40,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 58 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 09:07:40,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-04-01 09:07:40,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-04-01 09:07:40,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:07:40,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2023-04-01 09:07:40,527 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2023-04-01 09:07:40,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:07:40,527 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2023-04-01 09:07:40,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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 09:07:40,527 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2023-04-01 09:07:40,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 09:07:40,528 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:07:40,528 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] [2023-04-01 09:07:40,534 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-01 09:07:40,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:07:40,734 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:07:40,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:07:40,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1565570042, now seen corresponding path program 4 times [2023-04-01 09:07:40,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:07:40,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310471483] [2023-04-01 09:07:40,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:07:40,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:07:40,756 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:07:40,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1433857491] [2023-04-01 09:07:40,757 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 09:07:40,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:07:40,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:07:40,771 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 09:07:40,788 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 09:07:40,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:07:40,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 57 conjunts are in the unsatisfiable core [2023-04-01 09:07:40,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:07:40,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2023-04-01 09:07:40,867 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 09:07:40,883 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 09:07:40,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-04-01 09:07:40,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-04-01 09:07:41,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-04-01 09:07:41,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-04-01 09:07:41,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-04-01 09:07:41,212 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:07:41,213 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:07:41,313 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 7 treesize of output 5 [2023-04-01 09:07:41,360 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 9 treesize of output 7 [2023-04-01 09:07:41,465 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 5 treesize of output 3 [2023-04-01 09:07:41,548 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 09:07:41,548 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 44 [2023-04-01 09:07:41,556 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 3 [2023-04-01 09:07:41,557 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 09:07:41,559 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 09:07:41,917 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:07:41,917 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:07:41,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310471483] [2023-04-01 09:07:41,917 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:07:41,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433857491] [2023-04-01 09:07:41,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433857491] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:07:41,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [761872182] [2023-04-01 09:07:41,919 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 09:07:41,919 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:07:41,919 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:07:41,919 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:07:41,920 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:07:41,984 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 87 for LOIs [2023-04-01 09:07:43,751 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 107 for LOIs [2023-04-01 09:07:43,806 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 92 for LOIs [2023-04-01 09:07:43,814 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:07:43,819 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:07:45,569 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1070#(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_~#sum~0.base_BEFORE_CALL_4| Int)) (and (not (= 3 |v_main_~#sum~0.base_BEFORE_CALL_4|)) (not (= |v_main_~#sum~0.base_BEFORE_CALL_4| |#StackHeapBarrier|)) (not (= |v_main_~#sum~0.base_BEFORE_CALL_4| 1)) (= (select |v_old(#valid)_BEFORE_CALL_15| 2) 1) (not (= 2 |v_main_~#sum~0.base_BEFORE_CALL_4|)) (not (= |v_main_~#sum~0.base_BEFORE_CALL_4| 0)) (= (select |v_old(#length)_BEFORE_CALL_15| 3) 12) (= (select (select |v_old(#memory_int)_BEFORE_CALL_15| 2) 1) 49) (= 115 (select (select |v_old(#memory_int)_BEFORE_CALL_15| 2) 0)) (= (select |v_old(#valid)_BEFORE_CALL_15| 0) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_15| 2) 3) 105) (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))) (= (select |v_old(#length)_BEFORE_CALL_15| 2) 8) (= (select (select |v_old(#memory_int)_BEFORE_CALL_15| 1) 0) 48) (= (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(#valid)_BEFORE_CALL_15| |v_main_~#sum~0.base_BEFORE_CALL_4|) 0) (= (select |v_old(#length)_BEFORE_CALL_15| 1) 2) (= (select |v_old(#valid)_BEFORE_CALL_15| 1) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_15| 2) 6) 99) (= (select (select |v_old(#memory_int)_BEFORE_CALL_15| 2) 2) 50) (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))) (= 102 (select (select |v_old(#memory_int)_BEFORE_CALL_15| 2) 4)) (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 (= (* 2 ~N~0) (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_4|) 0))))) (not (= ~N~0 0)) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 09:07:45,569 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:07:45,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:07:45,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2023-04-01 09:07:45,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070155556] [2023-04-01 09:07:45,569 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:07:45,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-01 09:07:45,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:07:45,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-01 09:07:45,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1450, Unknown=0, NotChecked=0, Total=1560 [2023-04-01 09:07:45,571 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 26 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:07:45,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:07:45,995 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2023-04-01 09:07:45,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 09:07:46,000 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2023-04-01 09:07:46,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:07:46,000 INFO L225 Difference]: With dead ends: 36 [2023-04-01 09:07:46,001 INFO L226 Difference]: Without dead ends: 31 [2023-04-01 09:07:46,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=122, Invalid=1600, Unknown=0, NotChecked=0, Total=1722 [2023-04-01 09:07:46,002 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 3 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 09:07:46,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 148 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 09:07:46,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-04-01 09:07:46,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2023-04-01 09:07:46,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:07:46,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2023-04-01 09:07:46,011 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 23 [2023-04-01 09:07:46,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:07:46,011 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2023-04-01 09:07:46,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:07:46,012 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2023-04-01 09:07:46,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 09:07:46,012 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:07:46,012 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:07:46,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 09:07:46,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:07:46,217 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:07:46,217 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:07:46,217 INFO L85 PathProgramCache]: Analyzing trace with hash 2036782350, now seen corresponding path program 5 times [2023-04-01 09:07:46,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:07:46,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307113346] [2023-04-01 09:07:46,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:07:46,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:07:46,231 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:07:46,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [972957352] [2023-04-01 09:07:46,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 09:07:46,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:07:46,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:07:46,233 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 09:07:46,247 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 09:07:46,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 09:07:46,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:07:46,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 09:07:46,366 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:07:46,417 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 09:07:46,417 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:07:46,471 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 09:07:46,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:07:46,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307113346] [2023-04-01 09:07:46,472 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:07:46,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972957352] [2023-04-01 09:07:46,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972957352] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:07:46,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1322485583] [2023-04-01 09:07:46,473 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 09:07:46,473 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:07:46,474 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:07:46,474 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:07:46,474 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:07:46,519 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 87 for LOIs [2023-04-01 09:07:48,080 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 107 for LOIs [2023-04-01 09:07:48,134 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 92 for LOIs [2023-04-01 09:07:48,142 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:07:48,146 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:07:49,527 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1354#(and (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_~#sum~0.base_BEFORE_CALL_5| Int)) (and (= (select (select |v_old(#memory_int)_BEFORE_CALL_19| 1) 0) 48) (= (select |v_old(#valid)_BEFORE_CALL_19| |v_main_~#sum~0.base_BEFORE_CALL_5|) 0) (not (= (* 2 ~N~0) (select (select |#memory_int| |v_main_~#sum~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_~#sum~0.base_BEFORE_CALL_5| 0)) (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)) (not (= 3 |v_main_~#sum~0.base_BEFORE_CALL_5|)) (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_~#sum~0.base_BEFORE_CALL_5| |#StackHeapBarrier|)) (not (= |v_old(#length)_BEFORE_CALL_19| (select |v_old(#memory_int)_BEFORE_CALL_19| 2))) (not (= 2 |v_main_~#sum~0.base_BEFORE_CALL_5|)) (= (select |v_old(#valid)_BEFORE_CALL_19| 3) 1) (= (select |v_old(#length)_BEFORE_CALL_19| 1) 2) (= (select (select |v_old(#memory_int)_BEFORE_CALL_19| 2) 3) 105) (not (= |v_main_~#sum~0.base_BEFORE_CALL_5| 1)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_19| 2) 6) 99) (= (select |v_old(#length)_BEFORE_CALL_19| 2) 8) (= (select |v_old(#valid)_BEFORE_CALL_19| 2) 1) (= 49 (select (select |v_old(#memory_int)_BEFORE_CALL_19| 2) 1)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_19| 2) 7) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_19| 2) 2) 50) (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) (= 115 (select (select |v_old(#memory_int)_BEFORE_CALL_19| 2) 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_19| 1) 1) 0))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= ~N~0 0)) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 09:07:49,528 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:07:49,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:07:49,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-04-01 09:07:49,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248077463] [2023-04-01 09:07:49,528 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:07:49,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 09:07:49,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:07:49,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 09:07:49,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2023-04-01 09:07:49,529 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 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 09:07:49,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:07:49,656 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2023-04-01 09:07:49,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 09:07:49,657 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 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 24 [2023-04-01 09:07:49,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:07:49,658 INFO L225 Difference]: With dead ends: 41 [2023-04-01 09:07:49,658 INFO L226 Difference]: Without dead ends: 33 [2023-04-01 09:07:49,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2023-04-01 09:07:49,659 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:07:49,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 44 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:07:49,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-01 09:07:49,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2023-04-01 09:07:49,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:07:49,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2023-04-01 09:07:49,668 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 24 [2023-04-01 09:07:49,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:07:49,668 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2023-04-01 09:07:49,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 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 09:07:49,668 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2023-04-01 09:07:49,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 09:07:49,668 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:07:49,669 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:07:49,674 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 09:07:49,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:07:49,873 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:07:49,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:07:49,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1247780542, now seen corresponding path program 6 times [2023-04-01 09:07:49,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:07:49,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186811701] [2023-04-01 09:07:49,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:07:49,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:07:49,891 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:07:49,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1421010151] [2023-04-01 09:07:49,891 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 09:07:49,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:07:49,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:07:49,895 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 09:07:49,898 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 09:07:49,962 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 09:07:49,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:07:49,963 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 09:07:49,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:07:50,006 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 09:07:50,006 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:07:50,043 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 09:07:50,043 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:07:50,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186811701] [2023-04-01 09:07:50,044 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:07:50,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421010151] [2023-04-01 09:07:50,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421010151] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:07:50,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1730021715] [2023-04-01 09:07:50,045 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 09:07:50,045 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:07:50,046 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:07:50,046 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:07:50,046 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:07:50,098 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 87 for LOIs [2023-04-01 09:07:51,659 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 107 for LOIs [2023-04-01 09:07:51,701 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 92 for LOIs [2023-04-01 09:07:51,710 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:07:51,715 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:07:53,088 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1647#(and (exists ((|v_old(#memory_int)_BEFORE_CALL_23| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_23| (Array Int Int)) (|v_main_~#sum~0.base_BEFORE_CALL_6| Int) (|v_old(#length)_BEFORE_CALL_23| (Array Int Int))) (and (= (select (select |v_old(#memory_int)_BEFORE_CALL_23| 1) 0) 48) (= 115 (select (select |v_old(#memory_int)_BEFORE_CALL_23| 2) 0)) (= 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) (= 49 (select (select |v_old(#memory_int)_BEFORE_CALL_23| 2) 1)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_23| 1) 1) 0) (= 8 (select |v_old(#length)_BEFORE_CALL_23| 2)) (not (= |v_main_~#sum~0.base_BEFORE_CALL_6| |#StackHeapBarrier|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_23| 2) 4) 102) (not (= 3 |v_main_~#sum~0.base_BEFORE_CALL_6|)) (not (= |v_main_~#sum~0.base_BEFORE_CALL_6| 1)) (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|)) (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 (= 2 |v_main_~#sum~0.base_BEFORE_CALL_6|)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_23| 2) |v_old(#length)_BEFORE_CALL_23|)) (not (= |v_main_~#sum~0.base_BEFORE_CALL_6| 0)) (= (select |v_old(#valid)_BEFORE_CALL_23| |v_main_~#sum~0.base_BEFORE_CALL_6|) 0) (= (select |v_old(#valid)_BEFORE_CALL_23| 1) 1) (= (select |v_old(#valid)_BEFORE_CALL_23| 3) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_23| 2) 5) 46) (not (= (* 2 ~N~0) (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_6|) 0))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_23| 2) 2) 50) (= (select (select |v_old(#memory_int)_BEFORE_CALL_23| 2) 3) 105) (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))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= ~N~0 0)) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 09:07:53,088 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:07:53,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:07:53,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2023-04-01 09:07:53,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773637782] [2023-04-01 09:07:53,089 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:07:53,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 09:07:53,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:07:53,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 09:07:53,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2023-04-01 09:07:53,090 INFO L87 Difference]: Start difference. First operand 27 states and 30 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 09:07:53,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:07:53,196 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2023-04-01 09:07:53,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 09:07:53,197 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 24 [2023-04-01 09:07:53,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:07:53,198 INFO L225 Difference]: With dead ends: 43 [2023-04-01 09:07:53,198 INFO L226 Difference]: Without dead ends: 27 [2023-04-01 09:07:53,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2023-04-01 09:07:53,199 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:07:53,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 66 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:07:53,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-04-01 09:07:53,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-04-01 09:07:53,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:07:53,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2023-04-01 09:07:53,208 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2023-04-01 09:07:53,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:07:53,208 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2023-04-01 09:07:53,208 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 09:07:53,208 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2023-04-01 09:07:53,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-01 09:07:53,209 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:07:53,209 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:07:53,214 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 09:07:53,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:07:53,413 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:07:53,413 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:07:53,413 INFO L85 PathProgramCache]: Analyzing trace with hash -247409057, now seen corresponding path program 7 times [2023-04-01 09:07:53,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:07:53,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234702841] [2023-04-01 09:07:53,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:07:53,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:07:53,446 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:07:53,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1740377236] [2023-04-01 09:07:53,446 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 09:07:53,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:07:53,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:07:53,465 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 09:07:53,472 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 09:07:53,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:07:53,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 82 conjunts are in the unsatisfiable core [2023-04-01 09:07:53,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:07:53,560 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 09:07:53,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 09:07:53,586 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 09:07:53,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-04-01 09:07:53,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2023-04-01 09:07:53,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 41 [2023-04-01 09:07:53,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 41 [2023-04-01 09:07:53,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 41 [2023-04-01 09:07:53,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 41 [2023-04-01 09:07:53,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 41 [2023-04-01 09:07:53,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 41 [2023-04-01 09:07:54,077 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:07:54,077 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:07:54,149 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 7 treesize of output 5 [2023-04-01 09:07:54,193 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 9 treesize of output 7 [2023-04-01 09:07:54,241 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 09:07:54,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 24 [2023-04-01 09:07:54,249 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 9 treesize of output 7 [2023-04-01 09:07:54,377 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 5 treesize of output 3 [2023-04-01 09:07:54,531 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 09:07:54,532 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 44 [2023-04-01 09:07:54,540 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 3 [2023-04-01 09:07:54,541 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 09:07:54,545 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 09:07:54,546 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 09:07:54,671 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 31 treesize of output 29 [2023-04-01 09:07:54,676 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 3 [2023-04-01 09:07:54,678 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 09:07:54,680 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 09:07:54,681 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 09:07:54,683 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 09:07:55,849 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:07:55,868 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:07:55,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:07:55,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234702841] [2023-04-01 09:07:55,868 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:07:55,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740377236] [2023-04-01 09:07:55,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740377236] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:07:55,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2011888380] [2023-04-01 09:07:55,870 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 09:07:55,870 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:07:55,870 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:07:55,870 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:07:55,870 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:07:55,911 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 87 for LOIs [2023-04-01 09:07:57,442 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 107 for LOIs [2023-04-01 09:07:57,502 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 92 for LOIs [2023-04-01 09:07:57,513 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:07:57,518 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:07:59,509 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1977#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= ~N~0 0)) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (exists ((|v_old(#length)_BEFORE_CALL_27| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_27| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_27| (Array Int Int)) (|v_main_~#sum~0.base_BEFORE_CALL_7| Int)) (and (= (select (select |v_old(#memory_int)_BEFORE_CALL_27| 2) 7) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_27| 1) 0) 48) (not (= |v_old(#valid)_BEFORE_CALL_27| (select |v_old(#memory_int)_BEFORE_CALL_27| 1))) (not (= |v_main_~#sum~0.base_BEFORE_CALL_7| 0)) (not (= (* 2 ~N~0) (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_7|) 0))) (not (= |v_old(#valid)_BEFORE_CALL_27| |v_old(#length)_BEFORE_CALL_27|)) (= (select |v_old(#length)_BEFORE_CALL_27| 1) 2) (not (= 2 |v_main_~#sum~0.base_BEFORE_CALL_7|)) (= (select |v_old(#length)_BEFORE_CALL_27| 2) 8) (not (= (select |v_old(#memory_int)_BEFORE_CALL_27| 1) |v_old(#length)_BEFORE_CALL_27|)) (= (select |v_old(#valid)_BEFORE_CALL_27| 1) 1) (not (= |v_main_~#sum~0.base_BEFORE_CALL_7| 1)) (= 49 (select (select |v_old(#memory_int)_BEFORE_CALL_27| 2) 1)) (not (= |v_main_~#sum~0.base_BEFORE_CALL_7| |#StackHeapBarrier|)) (= (select |v_old(#valid)_BEFORE_CALL_27| 0) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_27| 2) 6) 99) (= (select (select |v_old(#memory_int)_BEFORE_CALL_27| 1) 1) 0) (= (select |v_old(#valid)_BEFORE_CALL_27| 2) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_27| 2) 2) 50) (= 115 (select (select |v_old(#memory_int)_BEFORE_CALL_27| 2) 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_27| 2) 3) 105) (= (select |v_old(#valid)_BEFORE_CALL_27| |v_main_~#sum~0.base_BEFORE_CALL_7|) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_27| 2) 4) 102) (not (= (select |v_old(#memory_int)_BEFORE_CALL_27| 1) (select |v_old(#memory_int)_BEFORE_CALL_27| 2))) (= 12 (select |v_old(#length)_BEFORE_CALL_27| 3)) (= (select |v_old(#valid)_BEFORE_CALL_27| 3) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_27| 2) 5) 46) (not (= |v_old(#valid)_BEFORE_CALL_27| (select |v_old(#memory_int)_BEFORE_CALL_27| 2))) (not (= 3 |v_main_~#sum~0.base_BEFORE_CALL_7|)) (not (= |v_old(#length)_BEFORE_CALL_27| (select |v_old(#memory_int)_BEFORE_CALL_27| 2))))) (= |#NULL.base| 0))' at error location [2023-04-01 09:07:59,510 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:07:59,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:07:59,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2023-04-01 09:07:59,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818003393] [2023-04-01 09:07:59,510 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:07:59,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-04-01 09:07:59,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:07:59,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-04-01 09:07:59,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=2091, Unknown=0, NotChecked=0, Total=2256 [2023-04-01 09:07:59,512 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 34 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 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)